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[PATCH OLK-5.10] iommu/iova: increase the iova_rcache depot max size to 128
by Zhang Zekun 21 Jun '23

21 Jun '23

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7ASVH CVE: NA --------------------------------------- In fio test with iodepth=256 with allowd cpus to 0-255, we observe a serve performance decrease. The statistic of cache hit rate are relatively low. Here are some statistics about the iova_cpu_rcahe of all cpus: iova alloc order 0 1 2 3 4 5 ---------------------------------------------------------------------- average cpu_rcache hit rate 0.9941 0.7408 0.8109 0.8854 0.9082 0.8887 Jobs: 12 (f=12): [R(12)][20.0%][r=1091MiB/s][r=279k IOPS][eta 00m:28s] Jobs: 12 (f=12): [R(12)][22.2%][r=1426MiB/s][r=365k IOPS][eta 00m:28s] Jobs: 12 (f=12): [R(12)][25.0%][r=1607MiB/s][r=411k IOPS][eta 00m:27s] Jobs: 12 (f=12): [R(12)][27.8%][r=1501MiB/s][r=384k IOPS][eta 00m:26s] Jobs: 12 (f=12): [R(12)][30.6%][r=1486MiB/s][r=380k IOPS][eta 00m:25s] Jobs: 12 (f=12): [R(12)][33.3%][r=1393MiB/s][r=357k IOPS][eta 00m:24s] Jobs: 12 (f=12): [R(12)][36.1%][r=1550MiB/s][r=397k IOPS][eta 00m:23s] Jobs: 12 (f=12): [R(12)][38.9%][r=1485MiB/s][r=380k IOPS][eta 00m:22s] The under lying hisi sas driver has 16 thread irqs to free iova, but these irq call back function will only free iovas on 16 certain cpus(cpu{0, 16,32...,240}). For example, thread irq which smp affinity is 0-15, will only free iova on cpu 0. However, the driver will alloc iova on all cpus(cpu{0-255}), cpus without free iova in local cpu_rcache need to get free iovas from iova_rcache->depot. The current size of iova_rcache->depot max size is 32, and it seems to be too small for 256 users (16 cpus will put iovas to iova_rcache->depot and 240 cpus will try to get iova from it). Set iova_rcache->depot to 128 can fix the performance issue, and the performance can return to normal. iova alloc order 0 1 2 3 4 5 ---------------------------------------------------------------------- average cpu_rcache hit rate 0.9925 0.9736 0.9789 0.9867 0.9889 0.9906 Jobs: 12 (f=12): [R(12)][12.9%][r=7526MiB/s][r=1927k IOPS][eta 04m:30s] Jobs: 12 (f=12): [R(12)][13.2%][r=7527MiB/s][r=1927k IOPS][eta 04m:29s] Jobs: 12 (f=12): [R(12)][13.5%][r=7529MiB/s][r=1927k IOPS][eta 04m:28s] Jobs: 12 (f=12): [R(12)][13.9%][r=7531MiB/s][r=1928k IOPS][eta 04m:27s] Jobs: 12 (f=12): [R(12)][14.2%][r=7529MiB/s][r=1928k IOPS][eta 04m:26s] Jobs: 12 (f=12): [R(12)][14.5%][r=7528MiB/s][r=1927k IOPS][eta 04m:25s] Jobs: 12 (f=12): [R(12)][14.8%][r=7527MiB/s][r=1927k IOPS][eta 04m:24s] Jobs: 12 (f=12): [R(12)][15.2%][r=7525MiB/s][r=1926k IOPS][eta 04m:23s] Signed-off-by: Zhang Zekun <zhangzekun11(a)huawei.com> --- include/linux/iova.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/linux/iova.h b/include/linux/iova.h index dfa51ae49666..5f7029f3d0f2 100644 --- a/include/linux/iova.h +++ b/include/linux/iova.h @@ -26,7 +26,7 @@ struct iova_magazine; struct iova_cpu_rcache; #define IOVA_RANGE_CACHE_MAX_SIZE 6 /* log of max cached IOVA range size (in pages) */ -#define MAX_GLOBAL_MAGS 32 /* magazines per bin */ +#define MAX_GLOBAL_MAGS 128 /* magazines per bin */ struct iova_rcache { spinlock_t lock; -- 2.17.1

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[PATCH v2 openEuler-22.03-LTS-SP2] arm64: kernel: disable CNP on LINXICORE9100
by Tong Tiangen 21 Jun '23

21 Jun '23

hulk inclusion category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I7F28R CVE: NA -------------------------------- On Hisilicon LINXICORE9100 cores, sharing tlb entries on two cores when TTBRx.CNP=1 differs from the standard ARM core. This causes issues when tlb entries sharing between CPU cores. Avoid these issues by disabling CNP feature for Hisilicon LINXICORE9100 cores. Signed-off-by: Tong Tiangen <tongtiangen(a)huawei.com> --- Documentation/arm64/silicon-errata.rst | 2 ++ arch/arm64/Kconfig | 11 +++++++++++ arch/arm64/configs/openeuler_defconfig | 1 + arch/arm64/include/asm/cpucaps.h | 1 + arch/arm64/include/asm/cputype.h | 2 ++ arch/arm64/kernel/cpu_errata.c | 14 ++++++++++++++ arch/arm64/kernel/cpufeature.c | 3 +++ 7 files changed, 34 insertions(+) diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst index 2305def38396..41728b336105 100644 --- a/Documentation/arm64/silicon-errata.rst +++ b/Documentation/arm64/silicon-errata.rst @@ -151,6 +151,8 @@ stable kernels. +----------------+-----------------+-----------------+-----------------------------+ | Hisilicon | Hip09 | #162100801 | HISILICON_ERRATUM_162100801 | +----------------+-----------------+-----------------+-----------------------------+ +| Hisilicon | LINXICORE9100 | #162100125 | HISILICON_ERRATUM_162100125 | ++----------------+-----------------+-----------------+-----------------------------+ +----------------+-----------------+-----------------+-----------------------------+ | Qualcomm Tech. | Kryo/Falkor v1 | E1003 | QCOM_FALKOR_ERRATUM_1003 | +----------------+-----------------+-----------------+-----------------------------+ diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index e0143a3a9937..9a238d088245 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -812,6 +812,17 @@ config HISILICON_ERRATUM_162100801 If unsure, say Y. +config HISILICON_ERRATUM_162100125 + bool "Hisilicon erratum 162100125" + default y + help + On Hisilicon LINXICORE9100 cores, sharing tlb entries on two cores when + TTBRx.CNP=1 differs from the standard ARM core. This causes issues when + tlb entries sharing between CPU cores. Avoid these issues by disabling + CNP support for Hisilicon LINXICORE9100 cores. + + If unsure, say Y. + config QCOM_FALKOR_ERRATUM_1003 bool "Falkor E1003: Incorrect translation due to ASID change" default y diff --git a/arch/arm64/configs/openeuler_defconfig b/arch/arm64/configs/openeuler_defconfig index 49e6d4734c59..eb4ee0522446 100644 --- a/arch/arm64/configs/openeuler_defconfig +++ b/arch/arm64/configs/openeuler_defconfig @@ -391,6 +391,7 @@ CONFIG_SOCIONEXT_SYNQUACER_PREITS=y CONFIG_HISILICON_ERRATUM_HIP08_RU_PREFETCH=y # CONFIG_HISILICON_HIP08_RU_PREFETCH_DEFAULT_OFF is not set CONFIG_HISILICON_ERRATUM_162100801=y +CONFIG_HISILICON_ERRATUM_162100125=y # end of ARM errata workarounds via the alternatives framework CONFIG_ARM64_4K_PAGES=y diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h index 37240e1f553c..b43f8e374114 100644 --- a/arch/arm64/include/asm/cpucaps.h +++ b/arch/arm64/include/asm/cpucaps.h @@ -74,6 +74,7 @@ #define ARM64_SPECTRE_BHB 66 #define ARM64_WORKAROUND_1742098 67 #define ARM64_HAS_WFXT 68 +#define ARM64_WORKAROUND_HISILICON_ERRATUM_162100125 69 #define ARM64_NCAPS 80 diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h index 812781fba3f9..e6b0ec40932d 100644 --- a/arch/arm64/include/asm/cputype.h +++ b/arch/arm64/include/asm/cputype.h @@ -111,6 +111,7 @@ #define HISI_CPU_PART_TSV110 0xD01 #define HISI_CPU_PART_TSV200 0xD02 +#define HISI_CPU_PART_LINXICORE9100 0xD02 #define PHYTIUM_CPU_PART_1500A 0X660 #define PHYTIUM_CPU_PART_2000AHK 0X661 @@ -161,6 +162,7 @@ #define MIDR_FUJITSU_A64FX MIDR_CPU_MODEL(ARM_CPU_IMP_FUJITSU, FUJITSU_CPU_PART_A64FX) #define MIDR_HISI_TSV110 MIDR_CPU_MODEL(ARM_CPU_IMP_HISI, HISI_CPU_PART_TSV110) #define MIDR_HISI_TSV200 MIDR_CPU_MODEL(ARM_CPU_IMP_HISI, HISI_CPU_PART_TSV200) +#define MIDR_HISI_LINXICORE9100 MIDR_CPU_MODEL(ARM_CPU_IMP_HISI, HISI_CPU_PART_LINXICORE9100) #define MIDR_FT_1500A MIDR_CPU_MODEL(ARM_CPU_IMP_PHYTIUM, PHYTIUM_CPU_PART_1500A) #define MIDR_FT_2000AHK MIDR_CPU_MODEL(ARM_CPU_IMP_PHYTIUM, PHYTIUM_CPU_PART_2000AHK) #define MIDR_FT_2000PLUS MIDR_CPU_MODEL(ARM_CPU_IMP_PHYTIUM, PHYTIUM_CPU_PART_2000PLUS) diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c index 0955af96391b..7f175b3aac15 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -324,6 +324,13 @@ static const struct midr_range cavium_erratum_30115_cpus[] = { }; #endif +#ifdef CONFIG_HISILICON_ERRATUM_162100125 +static const struct midr_range hisilicon_erratum_162100125_cpus[] = { + MIDR_REV(MIDR_HISI_LINXICORE9100, 0, 0), + {}, +}; +#endif + #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003 static const struct arm64_cpu_capabilities qcom_erratum_1003_list[] = { { @@ -519,6 +526,13 @@ const struct arm64_cpu_capabilities arm64_errata[] = { .cpu_enable = hisilicon_1980005_enable, }, #endif +#ifdef CONFIG_HISILICON_ERRATUM_162100125 + { + .desc = "Hisilicon erratum 162100125", + .capability = ARM64_WORKAROUND_HISILICON_ERRATUM_162100125, + ERRATA_MIDR_RANGE_LIST(hisilicon_erratum_162100125_cpus), + }, +#endif #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003 { .desc = "Qualcomm Technologies Falkor/Kryo erratum 1003", diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 3b746db0f40c..57631fa553f6 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1330,6 +1330,9 @@ has_useable_cnp(const struct arm64_cpu_capabilities *entry, int scope) if (is_kdump_kernel()) return false; + if (cpus_have_const_cap(ARM64_WORKAROUND_HISILICON_ERRATUM_162100125)) + return false; + return has_cpuid_feature(entry, scope); } -- 2.25.1

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[PATCH openEuler-1.0-LTS 1/3] net/sched: flower: fix possible OOB write in fl_set_geneve_opt()
by Yongqiang Liu 21 Jun '23

21 Jun '23

From: Hangyu Hua <hbh25y(a)gmail.com> stable inclusion from stable-v4.19.285 commit 59a27414bb00e48c4153a8b794fb4e69910a6a1b category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I7E6ML CVE: CVE-2023-35788 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 4d56304e5827c8cc8cc18c75343d283af7c4825c ] If we send two TCA_FLOWER_KEY_ENC_OPTS_GENEVE packets and their total size is 252 bytes(key->enc_opts.len = 252) then key->enc_opts.len = opt->length = data_len / 4 = 0 when the third TCA_FLOWER_KEY_ENC_OPTS_GENEVE packet enters fl_set_geneve_opt. This bypasses the next bounds check and results in an out-of-bounds. Fixes: 0a6e77784f49 ("net/sched: allow flower to match tunnel options") Signed-off-by: Hangyu Hua <hbh25y(a)gmail.com> Reviewed-by: Simon Horman <simon.horman(a)corigine.com> Reviewed-by: Pieter Jansen van Vuuren <pieter.jansen-van-vuuren(a)amd.com> Link: https://lore.kernel.org/r/20230531102805.27090-1-hbh25y@gmail.com Signed-off-by: Paolo Abeni <pabeni(a)redhat.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Zhengchao Shao <shaozhengchao(a)huawei.com> Reviewed-by: Yue Haibing <yuehaibing(a)huawei.com> Reviewed-by: Wang Weiyang <wangweiyang2(a)huawei.com> Signed-off-by: Yongqiang Liu <liuyongqiang13(a)huawei.com> --- net/sched/cls_flower.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c index bd27251ba953..fff54fa798d5 100644 --- a/net/sched/cls_flower.c +++ b/net/sched/cls_flower.c @@ -634,6 +634,9 @@ static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, if (option_len > sizeof(struct geneve_opt)) data_len = option_len - sizeof(struct geneve_opt); + if (key->enc_opts.len > FLOW_DIS_TUN_OPTS_MAX - 4) + return -ERANGE; + opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; memset(opt, 0xff, option_len); opt->length = data_len / 4; -- 2.25.1

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[PATCH OLK-5.10] block: don't set GD_NEED_PART_SCAN if scan partition failed
by Li Lingfeng 21 Jun '23

21 Jun '23

From: Yu Kuai <yukuai3(a)huawei.com> mainline inclusion from mainline-v6.3-rc6~9^2 commit 3723091ea1884d599cc8b8bf719d6f42e8d4d8b1 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7F7J3 CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- Currently if disk_scan_partitions() failed, GD_NEED_PART_SCAN will still set, and partition scan will be proceed again when blkdev_get_by_dev() is called. However, this will cause a problem that re-assemble partitioned raid device will creat partition for underlying disk. Test procedure: mdadm -CR /dev/md0 -l 1 -n 2 /dev/sda /dev/sdb -e 1.0 sgdisk -n 0:0:+100MiB /dev/md0 blockdev --rereadpt /dev/sda blockdev --rereadpt /dev/sdb mdadm -S /dev/md0 mdadm -A /dev/md0 /dev/sda /dev/sdb Test result: underlying disk partition and raid partition can be observed at the same time Note that this can still happen in come corner cases that GD_NEED_PART_SCAN can be set for underlying disk while re-assemble raid device. Fixes: e5cfefa97bcc ("block: fix scan partition for exclusively open device again") Reviewed-by: Jan Kara <jack(a)suse.cz> Reviewed-by: Ming Lei <ming.lei(a)redhat.com> Signed-off-by: Yu Kuai <yukuai3(a)huawei.com> Signed-off-by: Jens Axboe <axboe(a)kernel.dk> Conflicts: block/genhd.c Signed-off-by: Li Lingfeng <lilingfeng3(a)huawei.com> --- block/genhd.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/block/genhd.c b/block/genhd.c index 3c34dd011585..83f407e1563a 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -770,6 +770,13 @@ int disk_scan_partitions(struct gendisk *disk, fmode_t mode) else blkdev_put(bdev, mode & ~FMODE_EXCL); + /* + * If blkdev_get_by_dev() failed early, GD_NEED_PART_SCAN is still set, + * and this will cause that re-assemble partitioned raid device will + * creat partition for underlying disk. + */ + clear_bit(GD_NEED_PART_SCAN, &disk->state); + if (!(mode & FMODE_EXCL)) { bd_abort_claiming(claim, claim, disk_scan_partitions); bdput(claim); -- 2.31.1

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[PATCH openEuler-22.03-LTS-SP2] arm64: kernel: disable CNP on LINXICORE9100
by Tong Tiangen 21 Jun '23

21 Jun '23

hulk inclusion category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I7F28R CVE: NA -------------------------------- On Hisilicon LINXICORE9100 cores, sharing tlb entries on two cores when TTBRx.CNP=1 differs from the standard ARM core. This causes issues when tlb entries sharing between CPU cores. Avoid these issues by disabling CNP feature for Hisilicon LINXICORE9100 cores. Signed-off-by: Tong Tiangen <tongtiangen(a)huawei.com> --- Documentation/arm64/silicon-errata.rst | 2 ++ arch/arm64/Kconfig | 11 +++++++++++ arch/arm64/include/asm/cpucaps.h | 1 + arch/arm64/include/asm/cputype.h | 2 ++ arch/arm64/kernel/cpu_errata.c | 14 ++++++++++++++ arch/arm64/kernel/cpufeature.c | 3 +++ 6 files changed, 33 insertions(+) diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst index 2305def38396..41728b336105 100644 --- a/Documentation/arm64/silicon-errata.rst +++ b/Documentation/arm64/silicon-errata.rst @@ -151,6 +151,8 @@ stable kernels. +----------------+-----------------+-----------------+-----------------------------+ | Hisilicon | Hip09 | #162100801 | HISILICON_ERRATUM_162100801 | +----------------+-----------------+-----------------+-----------------------------+ +| Hisilicon | LINXICORE9100 | #162100125 | HISILICON_ERRATUM_162100125 | ++----------------+-----------------+-----------------+-----------------------------+ +----------------+-----------------+-----------------+-----------------------------+ | Qualcomm Tech. | Kryo/Falkor v1 | E1003 | QCOM_FALKOR_ERRATUM_1003 | +----------------+-----------------+-----------------+-----------------------------+ diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index e0143a3a9937..9a238d088245 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -812,6 +812,17 @@ config HISILICON_ERRATUM_162100801 If unsure, say Y. +config HISILICON_ERRATUM_162100125 + bool "Hisilicon erratum 162100125" + default y + help + On Hisilicon LINXICORE9100 cores, sharing tlb entries on two cores when + TTBRx.CNP=1 differs from the standard ARM core. This causes issues when + tlb entries sharing between CPU cores. Avoid these issues by disabling + CNP support for Hisilicon LINXICORE9100 cores. + + If unsure, say Y. + config QCOM_FALKOR_ERRATUM_1003 bool "Falkor E1003: Incorrect translation due to ASID change" default y diff --git a/arch/arm64/include/asm/cpucaps.h b/arch/arm64/include/asm/cpucaps.h index 37240e1f553c..b43f8e374114 100644 --- a/arch/arm64/include/asm/cpucaps.h +++ b/arch/arm64/include/asm/cpucaps.h @@ -74,6 +74,7 @@ #define ARM64_SPECTRE_BHB 66 #define ARM64_WORKAROUND_1742098 67 #define ARM64_HAS_WFXT 68 +#define ARM64_WORKAROUND_HISILICON_ERRATUM_162100125 69 #define ARM64_NCAPS 80 diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h index 812781fba3f9..e6b0ec40932d 100644 --- a/arch/arm64/include/asm/cputype.h +++ b/arch/arm64/include/asm/cputype.h @@ -111,6 +111,7 @@ #define HISI_CPU_PART_TSV110 0xD01 #define HISI_CPU_PART_TSV200 0xD02 +#define HISI_CPU_PART_LINXICORE9100 0xD02 #define PHYTIUM_CPU_PART_1500A 0X660 #define PHYTIUM_CPU_PART_2000AHK 0X661 @@ -161,6 +162,7 @@ #define MIDR_FUJITSU_A64FX MIDR_CPU_MODEL(ARM_CPU_IMP_FUJITSU, FUJITSU_CPU_PART_A64FX) #define MIDR_HISI_TSV110 MIDR_CPU_MODEL(ARM_CPU_IMP_HISI, HISI_CPU_PART_TSV110) #define MIDR_HISI_TSV200 MIDR_CPU_MODEL(ARM_CPU_IMP_HISI, HISI_CPU_PART_TSV200) +#define MIDR_HISI_LINXICORE9100 MIDR_CPU_MODEL(ARM_CPU_IMP_HISI, HISI_CPU_PART_LINXICORE9100) #define MIDR_FT_1500A MIDR_CPU_MODEL(ARM_CPU_IMP_PHYTIUM, PHYTIUM_CPU_PART_1500A) #define MIDR_FT_2000AHK MIDR_CPU_MODEL(ARM_CPU_IMP_PHYTIUM, PHYTIUM_CPU_PART_2000AHK) #define MIDR_FT_2000PLUS MIDR_CPU_MODEL(ARM_CPU_IMP_PHYTIUM, PHYTIUM_CPU_PART_2000PLUS) diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c index 0955af96391b..7f175b3aac15 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -324,6 +324,13 @@ static const struct midr_range cavium_erratum_30115_cpus[] = { }; #endif +#ifdef CONFIG_HISILICON_ERRATUM_162100125 +static const struct midr_range hisilicon_erratum_162100125_cpus[] = { + MIDR_REV(MIDR_HISI_LINXICORE9100, 0, 0), + {}, +}; +#endif + #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003 static const struct arm64_cpu_capabilities qcom_erratum_1003_list[] = { { @@ -519,6 +526,13 @@ const struct arm64_cpu_capabilities arm64_errata[] = { .cpu_enable = hisilicon_1980005_enable, }, #endif +#ifdef CONFIG_HISILICON_ERRATUM_162100125 + { + .desc = "Hisilicon erratum 162100125", + .capability = ARM64_WORKAROUND_HISILICON_ERRATUM_162100125, + ERRATA_MIDR_RANGE_LIST(hisilicon_erratum_162100125_cpus), + }, +#endif #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003 { .desc = "Qualcomm Technologies Falkor/Kryo erratum 1003", diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 3b746db0f40c..57631fa553f6 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1330,6 +1330,9 @@ has_useable_cnp(const struct arm64_cpu_capabilities *entry, int scope) if (is_kdump_kernel()) return false; + if (cpus_have_const_cap(ARM64_WORKAROUND_HISILICON_ERRATUM_162100125)) + return false; + return has_cpuid_feature(entry, scope); } -- 2.25.1

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[PATCH openEuler-22.03-LTS-SP2] kernel: update SP2 OPENEULER_MINOR value to 2
by Jialin Zhang 21 Jun '23

21 Jun '23

hulk inclusion category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I796HQ -------------------------------- The version information OPENEULER_MINOR is not right in SP2, update it's value to 2. Signed-off-by: Jialin Zhang <zhangjialin11(a)huawei.com> --- Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Makefile b/Makefile index 4778c71a1e75..b36218bd47c2 100644 --- a/Makefile +++ b/Makefile @@ -5,7 +5,7 @@ SUBLEVEL = 0 EXTRAVERSION = NAME = Kleptomaniac Octopus OPENEULER_MAJOR = 2203 -OPENEULER_MINOR = 1 +OPENEULER_MINOR = 2 # *DOCUMENTATION* # To see a list of typical targets execute "make help" -- 2.25.1

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[PATCH openEuler-22.03-LTS-SP2] kernel: update SP2 OPENEULER_MINOR value to 2
by Jialin Zhang 21 Jun '23

21 Jun '23

hulk inclusion category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I796HQ -------------------------------- The version information OPENEULER_MINOR is not right in SP2, update it's value to 2. Signed-off-by: Jialin Zhang <zhangjialin11(a)huawei.com> --- Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Makefile b/Makefile index 4778c71a1e75..b36218bd47c2 100644 --- a/Makefile +++ b/Makefile @@ -5,7 +5,7 @@ SUBLEVEL = 0 EXTRAVERSION = NAME = Kleptomaniac Octopus OPENEULER_MAJOR = 2203 -OPENEULER_MINOR = 1 +OPENEULER_MINOR = 2 # *DOCUMENTATION* # To see a list of typical targets execute "make help" -- 2.25.1

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[PATCH openEuler-22.03-LTS-SP2 0/3] Revert "locking/rwsem: Prevent
by Zheng Zengkai 21 Jun '23

21 Jun '23

2f06f702925b ("locking/rwsem: Prevent potential lock starvation"): This patch may have some impact on reader performance as it reduces reader optimistic spinning especially if the lock critical sections are short the number of contending readers are small. This patch will lead to 30%+ performance degradation to fio write_iops_blocksize 4KB testcase, and we stress the system with mysql tpcc for 12 hours, no hungtask occur, So revert this patchset temporarily. Zheng Zengkai (3): Revert "locking/rwsem: Prevent potential lock starvation" Revert "locking/rwsem: Pass the current atomic count to rwsem_down_read_slowpath()" Revert "locking/rwsem: Better collate rwsem_read_trylock()" kernel/locking/rwsem.c | 56 ++++++++++++++---------------------------- 1 file changed, 19 insertions(+), 37 deletions(-) -- 2.20.1

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[PATCH openEuler-22.03-LTS-SP2 0/1] uacce: fix the uacce isolattion reference counting error
by Wenkai Lin 21 Jun '23

21 Jun '23

From: JiangShui Yang <yangjiangshui(a)h-partners.com> Due to the process change of the lock, A thread invokes the 'put_queue' twice. The value of uacce reference counting becomes a negative number. The 'fops_open' and 'fops_release' are symmetrical. So move the process of decrement to 'fops_release' from 'put_queue'. Kai Ye (1): uacce: fix the uacce isolattion reference counting error drivers/misc/uacce/uacce.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- 2.30.0

2 2

[PATCH OLK-5.10 0/1] fs/stat: make tmp variable 16-bytes aligned in copy stat
by Yang Yingliang 21 Jun '23

21 Jun '23

The tmp variable is used to copy_to_user(), it has better performance if the address accesseed by ldp instruction is 16 bytes aligned on arm64. The performance of nginx test is improved after this patch: http "Connection: close" 1.11% http "Connection: keep-alive" 2.11% https "Connection: close" 1.56% https "Connection: keep-alive" 0.18% Yang Yingliang (1): fs/stat: make tmp variable 16-bytes aligned in copy stat fs/stat.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) -- 2.25.1

2 2

[PATCH OLK-5.10 0/2] fix memleak with efi_fake_mem
by Wupeng Ma 21 Jun '23

21 Jun '23

From: Ma Wupeng <mawupeng1(a)huawei.com> 1. fix memleak with efi_fake_mem 2. disable efi_fake_mem support by default for arm64 Ma Wupeng (2): efi: Fix UAF for arm64 when enable efi_fake_mem config: Disable EFI_FAKE_MEMMAP support for arm64 by default arch/arm64/configs/openeuler_defconfig | 3 +-- drivers/firmware/efi/fake_mem.c | 13 +++++++++++++ 2 files changed, 14 insertions(+), 2 deletions(-) -- 2.25.1

2 3

[PATCH OLK-5.10 0/3] fix memory reliable related issues
by Wupeng Ma 21 Jun '23

21 Jun '23

From: Ma Wupeng <mawupeng1(a)huawei.com> Fix memory reliable related issues. Ma Wupeng (3): mm: mem_reliable: Fix reliable page counter mismatch problem mm: mem_reliable: Update reliable page counter to zero if underflows efi: Disable mirror feature during crashkernel drivers/firmware/efi/efi.c | 6 ++++++ include/linux/mem_reliable.h | 15 +++++++++++++-- mm/memory.c | 1 + 3 files changed, 20 insertions(+), 2 deletions(-) -- 2.25.1

2 4

[PATCH OLK-5.10] memcg: fix implicit declaration of memcg_print_bad_task()
by Liu Shixin 21 Jun '23

21 Jun '23

hulk inclusion category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6NYW4 CVE: NA -------------------------------- Fix implicit declaration of function 'memcg_print_bad_task'. Fixes: 9cd6f55e9c33 ("mm: oom: move memcg_print_bad_task() out of mem_cgroup_scan_tasks()") Signed-off-by: Liu Shixin <liushixin2(a)huawei.com> --- include/linux/memcontrol.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 5b8982e95876..e1c24b0056d0 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -420,6 +420,8 @@ bool memcg_low_priority_scan_tasks(int (*)(struct task_struct *, void *), void memcg_print_bad_task(struct oom_control *oc); extern int sysctl_memcg_qos_handler(struct ctl_table *table, int write, void __user *buffer, size_t *length, loff_t *ppos); +#else +void memcg_print_bad_task(struct oom_control *oc); #endif /* @@ -1695,6 +1697,10 @@ unsigned long mem_cgroup_soft_limit_reclaim(pg_data_t *pgdat, int order, { return 0; } + +static inline void memcg_print_bad_task(struct oom_control *oc) +{ +} #endif /* CONFIG_MEMCG */ /* idx can be of type enum memcg_stat_item or node_stat_item */ -- 2.25.1

2 1

[PATCH opwnEuler-22.03-LTS-SP2 0/1] uacce: remove uacce device refcnt
by Wenkai Lin 21 Jun '23

21 Jun '23

From: JiangShui Yang <yangjiangshui(a)h-partners.com> Delete the reference counting so that the isolation policy can be dynamically configured. Wenkai Lin (1): uacce: remove uacce device refcnt drivers/misc/uacce/uacce.c | 5 ----- include/linux/uacce.h | 2 -- 2 files changed, 7 deletions(-) -- 2.30.0

1 1

[PATCH openEuler-22.03-LTS-SP2 0/2] Fix NULL pointer and Keep PERF_PMU_CAP_EXCLUSIVE
by Junhao He 20 Jun '23

20 Jun '23

1) Fix NULL pointer for hisi_ptt 2) Keep to advertise PERF_PMU_CAP_EXCLUSIVE. Such ptt pmus can only have one event scheduled at a time. Junhao He (2): hwtracing: hisi_ptt: Add dummy callback pmu::read() hwtracing: hisi_ptt: Keep to advertise PERF_PMU_CAP_EXCLUSIVE drivers/hwtracing/ptt/hisi_ptt.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) -- 2.33.0

2 3

[PATCH OLK-5.10 0/2] nbd: validate the block size in nbd_set_size
by Zhong Jinghua 20 Jun '23

20 Jun '23

nbd: validate the block size in nbd_set_size Christoph Hellwig (1): nbd: validate the block size in nbd_set_size Zhong Jinghua (1): nbd: fix incomplete validation of ioctl arg drivers/block/nbd.c | 51 ++++++++++++++++++--------------------------- 1 file changed, 20 insertions(+), 31 deletions(-) -- 2.31.1

2 3

[PATCH openEuler-22.03-LTS-SP2 v2 0/2] Fix some warning messages in netacc
by Liu Jian 20 Jun '23

20 Jun '23

v1->v2: add bugzilla tag. Fix below warning messages: libbpf: Error in bpf_create_map_xattr(redissock_map):ERROR: strerror_r(-524)=22(-524). Retrying without BTF. rmmod: ERROR: Module localip is not currently loaded Hengqi Chen (1): libbpf: Support uniform BTF-defined key/value specification across all BPF maps Liu Jian (1): tools: ignore one warning message tools/lib/bpf/libbpf.c | 24 ++++++++++++++++++++++++ tools/netacc/net-acc | 2 +- 2 files changed, 25 insertions(+), 1 deletion(-) -- 2.34.1

2 3

[PATCH openEuler-1.0-LTS 0/5] sched: Some fixes for smart grid
by Zhang Changzhong 20 Jun '23

20 Jun '23

Some fixes for smart gird, as follows: Hui Tang (5): sched: Fix timer storm for smart grid sched: fix dereference NULL pointers sched: Fix memory leak on error branch sched: clear credit count in error branch sched: Adjust few parameters range for smart grid kernel/fork.c | 2 +- kernel/sched/core.c | 32 ++++++++++++++++++++++++++++---- kernel/sched/fair.c | 40 ++++++++++++++++++++-------------------- kernel/sysctl.c | 6 ++++-- 4 files changed, 53 insertions(+), 27 deletions(-) -- 2.9.5

1 5

[OLK-5.10 v2] RDMA/hns: Fix CQ and QP cache affinity
by Chengchang Tang 20 Jun '23

20 Jun '23

driver inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7DCX0 --------------------------------------------------------------------------- Currently, the affinity between QP cache and CQ cache is not considered when assigning QPN, it will affect the message rate of HW. Allocate QPN from QP cache with better CQ affinity to get better performance. Fixes: c746005b2800 ("RDMA/hns: Create QP with selected QPN for bank load balance") Signed-off-by: Chengchang Tang <tangchengchang(a)huawei.com> --- drivers/infiniband/hw/hns/hns_roce_device.h | 1 + drivers/infiniband/hw/hns/hns_roce_qp.c | 29 ++++++++++++++++----- 2 files changed, 24 insertions(+), 6 deletions(-) diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h index 01c16a4d97c5..9694cef03adb 100644 --- a/drivers/infiniband/hw/hns/hns_roce_device.h +++ b/drivers/infiniband/hw/hns/hns_roce_device.h @@ -101,6 +101,7 @@ #define HNS_ROCE_CQ_BANK_NUM 4 #define CQ_BANKID_SHIFT 2 +#define CQ_BANKID_MASK GENMASK(1, 0) enum { SERV_TYPE_RC, diff --git a/drivers/infiniband/hw/hns/hns_roce_qp.c b/drivers/infiniband/hw/hns/hns_roce_qp.c index f64464fbad41..2c11b1a0b0c7 100644 --- a/drivers/infiniband/hw/hns/hns_roce_qp.c +++ b/drivers/infiniband/hw/hns/hns_roce_qp.c @@ -171,14 +171,29 @@ static void hns_roce_ib_qp_event(struct hns_roce_qp *hr_qp, } } -static u8 get_least_load_bankid_for_qp(struct hns_roce_bank *bank) +static u8 get_affinity_cq_bank(u8 qp_bank) { - u32 least_load = bank[0].inuse; + return (qp_bank >> 1) & CQ_BANKID_MASK; +} + +static u8 get_least_load_bankid_for_qp(struct ib_qp_init_attr *init_attr, + struct hns_roce_bank *bank) +{ +#define INVALID_LOAD_QPNUM 0xFFFFFFFF + struct ib_cq *scq = init_attr->send_cq; + u32 least_load = INVALID_LOAD_QPNUM; + unsigned long cqn = 0; u8 bankid = 0; u32 bankcnt; u8 i; - for (i = 1; i < HNS_ROCE_QP_BANK_NUM; i++) { + if (scq) + cqn = to_hr_cq(scq)->cqn; + + for (i = 0; i < HNS_ROCE_QP_BANK_NUM; i++) { + if (scq && (get_affinity_cq_bank(i) != (cqn & CQ_BANKID_MASK))) + continue; + bankcnt = bank[i].inuse; if (bankcnt < least_load) { least_load = bankcnt; @@ -210,7 +225,9 @@ static int alloc_qpn_with_bankid(struct hns_roce_bank *bank, u8 bankid, return 0; } -static int alloc_qpn(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp) + +static int alloc_qpn(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp, + struct ib_qp_init_attr *init_attr) { struct hns_roce_qp_table *qp_table = &hr_dev->qp_table; unsigned long num = 0; @@ -222,7 +239,7 @@ static int alloc_qpn(struct hns_roce_dev *hr_dev, struct hns_roce_qp *hr_qp) hr_qp->doorbell_qpn = 1; } else { mutex_lock(&qp_table->bank_mutex); - bankid = get_least_load_bankid_for_qp(qp_table->bank); + bankid = get_least_load_bankid_for_qp(init_attr, qp_table->bank); ret = alloc_qpn_with_bankid(&qp_table->bank[bankid], bankid, &num); @@ -1218,7 +1235,7 @@ static int hns_roce_create_qp_common(struct hns_roce_dev *hr_dev, } } - ret = alloc_qpn(hr_dev, hr_qp); + ret = alloc_qpn(hr_dev, hr_qp, init_attr); if (ret) { ibdev_err(ibdev, "failed to alloc QPN, ret = %d.\n", ret); goto err_qpn; -- 2.30.0

1 0

[PATCH OLK-5.10] relayfs: fix out-of-bounds access in relay_file_read
by GONG, Ruiqi 20 Jun '23

20 Jun '23

From: Zhang Zhengming <zhang.zhengming(a)h3c.com> stable inclusion from stable-v5.10.180 commit 1b0df44753bf9e45eaf5cee34f87597193f862e8 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I7E5C1 CVE: CVE-2023-3268 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… ---------------------------------------- commit 43ec16f1450f4936025a9bdf1a273affdb9732c1 upstream. There is a crash in relay_file_read, as the var from point to the end of last subbuf. The oops looks something like: pc : __arch_copy_to_user+0x180/0x310 lr : relay_file_read+0x20c/0x2c8 Call trace: __arch_copy_to_user+0x180/0x310 full_proxy_read+0x68/0x98 vfs_read+0xb0/0x1d0 ksys_read+0x6c/0xf0 __arm64_sys_read+0x20/0x28 el0_svc_common.constprop.3+0x84/0x108 do_el0_svc+0x74/0x90 el0_svc+0x1c/0x28 el0_sync_handler+0x88/0xb0 el0_sync+0x148/0x180 We get the condition by analyzing the vmcore: 1). The last produced byte and last consumed byte both at the end of the last subbuf 2). A softirq calls function(e.g __blk_add_trace) to write relay buffer occurs when an program is calling relay_file_read_avail(). relay_file_read relay_file_read_avail relay_file_read_consume(buf, 0, 0); //interrupted by softirq who will write subbuf .... return 1; //read_start point to the end of the last subbuf read_start = relay_file_read_start_pos //avail is equal to subsize avail = relay_file_read_subbuf_avail //from points to an invalid memory address from = buf->start + read_start //system is crashed copy_to_user(buffer, from, avail) Link: https://lkml.kernel.org/r/20230419040203.37676-1-zhang.zhengming@h3c.com Fixes: 8d62fdebdaf9 ("relay file read: start-pos fix") Signed-off-by: Zhang Zhengming <zhang.zhengming(a)h3c.com> Reviewed-by: Zhao Lei <zhao_lei1(a)hoperun.com> Reviewed-by: Zhou Kete <zhou.kete(a)h3c.com> Reviewed-by: Pengcheng Yang <yangpc(a)wangsu.com> Cc: Jens Axboe <axboe(a)kernel.dk> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: GONG, Ruiqi <gongruiqi1(a)huawei.com> --- kernel/relay.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/relay.c b/kernel/relay.c index b08d936d5fa7..9cae6bf2e66a 100644 --- a/kernel/relay.c +++ b/kernel/relay.c @@ -1077,7 +1077,8 @@ static size_t relay_file_read_start_pos(struct rchan_buf *buf) size_t subbuf_size = buf->chan->subbuf_size; size_t n_subbufs = buf->chan->n_subbufs; size_t consumed = buf->subbufs_consumed % n_subbufs; - size_t read_pos = consumed * subbuf_size + buf->bytes_consumed; + size_t read_pos = (consumed * subbuf_size + buf->bytes_consumed) + % (n_subbufs * subbuf_size); read_subbuf = read_pos / subbuf_size; padding = buf->padding[read_subbuf]; -- 2.25.1

2 1

[PATCH OLK-5.10 v2] memstick: r592: Fix UAF bug in r592_remove due to race condition
by Chen Zhongjin 20 Jun '23

20 Jun '23

From: Zheng Wang <zyytlz.wz(a)163.com> mainline inclusion from mainline-v6.4-rc1 commit 63264422785021704c39b38f65a78ab9e4a186d7 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7EK74 CVE: CVE-2023-3141 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- In r592_probe, dev->detect_timer was bound with r592_detect_timer. In r592_irq function, the timer function will be invoked by mod_timer. If we remove the module which will call hantro_release to make cleanup, there may be a unfinished work. The possible sequence is as follows, which will cause a typical UAF bug. Fix it by canceling the work before cleanup in r592_remove. CPU0 CPU1 |r592_detect_timer r592_remove | memstick_free_host| put_device; | kfree(host); | | | queue_work | &host->media_checker //use Signed-off-by: Zheng Wang <zyytlz.wz(a)163.com> Link: https://lore.kernel.org/r/20230307164338.1246287-1-zyytlz.wz@163.com Signed-off-by: Ulf Hansson <ulf.hansson(a)linaro.org> Signed-off-by: Chen Zhongjin <chenzhongjin(a)huawei.com> --- drivers/memstick/host/r592.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/memstick/host/r592.c b/drivers/memstick/host/r592.c index eaa2a94d18be..dd06c18495eb 100644 --- a/drivers/memstick/host/r592.c +++ b/drivers/memstick/host/r592.c @@ -828,7 +828,7 @@ static void r592_remove(struct pci_dev *pdev) /* Stop the processing thread. That ensures that we won't take any more requests */ kthread_stop(dev->io_thread); - + del_timer_sync(&dev->detect_timer); r592_enable_device(dev, false); while (!error && dev->req) { -- 2.17.1

2 1

[PATCH OLK-5.10] net/sched: flower: fix possible OOB write in fl_set_geneve_opt()
by Zhengchao Shao 20 Jun '23

20 Jun '23

From: Hangyu Hua <hbh25y(a)gmail.com> stable inclusion from stable-v5.10.183 commit 7c5c67aa294444b53f697dc3ddce61b33ff8badd category: bugfix bugzilla: 188914 CVE: CVE-2023-35788 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 4d56304e5827c8cc8cc18c75343d283af7c4825c ] If we send two TCA_FLOWER_KEY_ENC_OPTS_GENEVE packets and their total size is 252 bytes(key->enc_opts.len = 252) then key->enc_opts.len = opt->length = data_len / 4 = 0 when the third TCA_FLOWER_KEY_ENC_OPTS_GENEVE packet enters fl_set_geneve_opt. This bypasses the next bounds check and results in an out-of-bounds. Fixes: 0a6e77784f49 ("net/sched: allow flower to match tunnel options") Signed-off-by: Hangyu Hua <hbh25y(a)gmail.com> Reviewed-by: Simon Horman <simon.horman(a)corigine.com> Reviewed-by: Pieter Jansen van Vuuren <pieter.jansen-van-vuuren(a)amd.com> Link: https://lore.kernel.org/r/20230531102805.27090-1-hbh25y@gmail.com Signed-off-by: Paolo Abeni <pabeni(a)redhat.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Zhengchao Shao <shaozhengchao(a)huawei.com> --- net/sched/cls_flower.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/sched/cls_flower.c b/net/sched/cls_flower.c index 8ff6945b9f8f..275122cc0b6d 100644 --- a/net/sched/cls_flower.c +++ b/net/sched/cls_flower.c @@ -1080,6 +1080,9 @@ static int fl_set_geneve_opt(const struct nlattr *nla, struct fl_flow_key *key, if (option_len > sizeof(struct geneve_opt)) data_len = option_len - sizeof(struct geneve_opt); + if (key->enc_opts.len > FLOW_DIS_TUN_OPTS_MAX - 4) + return -ERANGE; + opt = (struct geneve_opt *)&key->enc_opts.data[key->enc_opts.len]; memset(opt, 0xff, option_len); opt->length = data_len / 4; -- 2.34.1

2 1

[PATCH openEuler-1.0-LTS] memstick: r592: Fix UAF bug in r592_remove due to race condition
by Yongqiang Liu 20 Jun '23

20 Jun '23

From: Zheng Wang <zyytlz.wz(a)163.com> mainline inclusion from mainline-v6.4-rc1 commit 63264422785021704c39b38f65a78ab9e4a186d7 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7EK74 CVE: CVE-2023-3141 -------------------------------- In r592_probe, dev->detect_timer was bound with r592_detect_timer. In r592_irq function, the timer function will be invoked by mod_timer. If we remove the module which will call hantro_release to make cleanup, there may be a unfinished work. The possible sequence is as follows, which will cause a typical UAF bug. Fix it by canceling the work before cleanup in r592_remove. CPU0 CPU1 |r592_detect_timer r592_remove | memstick_free_host| put_device; | kfree(host); | | | queue_work | &host->media_checker //use Signed-off-by: Zheng Wang <zyytlz.wz(a)163.com> Link: https://lore.kernel.org/r/20230307164338.1246287-1-zyytlz.wz@163.com Signed-off-by: Ulf Hansson <ulf.hansson(a)linaro.org> Signed-off-by: Chen Zhongjin <chenzhongjin(a)huawei.com> Reviewed-by: Xu Kuohai <xukuohai(a)huawei.com> Reviewed-by: Xiu Jianfeng <xiujianfeng(a)huawei.com> Signed-off-by: Yongqiang Liu <liuyongqiang13(a)huawei.com> --- drivers/memstick/host/r592.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/memstick/host/r592.c b/drivers/memstick/host/r592.c index 627d6e62fe31..61b9c97cf0e7 100644 --- a/drivers/memstick/host/r592.c +++ b/drivers/memstick/host/r592.c @@ -827,7 +827,7 @@ static void r592_remove(struct pci_dev *pdev) /* Stop the processing thread. That ensures that we won't take any more requests */ kthread_stop(dev->io_thread); - + del_timer_sync(&dev->detect_timer); r592_enable_device(dev, false); while (!error && dev->req) { -- 2.25.1

1 0

[PATCH OLK-5.10] memstick: r592: Fix UAF bug in r592_remove due to race condition
by Chen Zhongjin 20 Jun '23

20 Jun '23

From: Zheng Wang <zyytlz.wz(a)163.com> mainline inclusion from mainline-v6.4-rc1 commit 63264422785021704c39b38f65a78ab9e4a186d7 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7EK74 CVE: CVE-2023-3141 -------------------------------- In r592_probe, dev->detect_timer was bound with r592_detect_timer. In r592_irq function, the timer function will be invoked by mod_timer. If we remove the module which will call hantro_release to make cleanup, there may be a unfinished work. The possible sequence is as follows, which will cause a typical UAF bug. Fix it by canceling the work before cleanup in r592_remove. CPU0 CPU1 |r592_detect_timer r592_remove | memstick_free_host| put_device; | kfree(host); | | | queue_work | &host->media_checker //use Signed-off-by: Zheng Wang <zyytlz.wz(a)163.com> Link: https://lore.kernel.org/r/20230307164338.1246287-1-zyytlz.wz@163.com Signed-off-by: Ulf Hansson <ulf.hansson(a)linaro.org> Signed-off-by: Chen Zhongjin <chenzhongjin(a)huawei.com> --- drivers/memstick/host/r592.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/memstick/host/r592.c b/drivers/memstick/host/r592.c index eaa2a94d18be..dd06c18495eb 100644 --- a/drivers/memstick/host/r592.c +++ b/drivers/memstick/host/r592.c @@ -828,7 +828,7 @@ static void r592_remove(struct pci_dev *pdev) /* Stop the processing thread. That ensures that we won't take any more requests */ kthread_stop(dev->io_thread); - + del_timer_sync(&dev->detect_timer); r592_enable_device(dev, false); while (!error && dev->req) { -- 2.17.1

1 0

[PATCH openEuler-22.03-LTS-SP2 0/2] Fix some warning messages in netacc
by Liu Jian 20 Jun '23

20 Jun '23

Fix below warning messages: libbpf: Error in bpf_create_map_xattr(redissock_map):ERROR: strerror_r(-524)=22(-524). Retrying without BTF. rmmod: ERROR: Module localip is not currently loaded Hengqi Chen (1): libbpf: Support uniform BTF-defined key/value specification across all BPF maps Liu Jian (1): tools: ignore one warning message tools/lib/bpf/libbpf.c | 24 ++++++++++++++++++++++++ tools/netacc/net-acc | 2 +- 2 files changed, 25 insertions(+), 1 deletion(-) -- 2.34.1

2 3

[PATCH openEuler-22.03-LTS] mm: oom: move memcg_print_bad_task() out of mem_cgroup_scan_tasks()
by Liu Shixin 19 Jun '23

19 Jun '23

From: Kang Chen <void0red(a)hust.edu.cn> hulk inclusion category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I6NYW4 CVE: NA -------------------------------- raw call flow: oom_kill_process -> mem_cgroup_scan_tasks(.., .., message) -> memcg_print_bad_task(message, ..) message is "const char*" type, and incorrectly cast to "oom_control*" type in memcg_print_bad_task. Fix it by moving memcg_print_bad_task out of mem_cgroup_scan_tasks and call it in select_bad_process and dump_tasks. Furthermore, use struct oom_control* directly and remove the useless parm `ret`. Reviewed-by: Kefeng Wang <wangkefeng.wang(a)huawei.com> Signed-off-by: Kang Chen <void0red(a)hust.edu.cn> Conflicts: include/linux/memcontrol.h Signed-off-by: Liu Shixin <liushixin2(a)huawei.com> --- include/linux/memcontrol.h | 3 ++- mm/memcontrol.c | 16 +++++++++------- mm/oom_kill.c | 14 ++++++++------ 3 files changed, 19 insertions(+), 14 deletions(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index a0143237b8a7..3480d9030108 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -23,6 +23,7 @@ #include <linux/page-flags.h> #include <linux/kabi.h> #include <linux/dynamic_hugetlb.h> +#include <linux/oom.h> struct mem_cgroup; struct obj_cgroup; @@ -400,7 +401,7 @@ DECLARE_STATIC_KEY_FALSE(memcg_qos_stat_key); bool memcg_low_priority_scan_tasks(int (*)(struct task_struct *, void *), void *); -void memcg_print_bad_task(void *arg, int ret); +void memcg_print_bad_task(struct oom_control *oc); extern int sysctl_memcg_qos_handler(struct ctl_table *table, int write, void __user *buffer, size_t *length, loff_t *ppos); #endif diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 467c1f2fd6ae..81429e8266ab 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1201,9 +1201,6 @@ int mem_cgroup_scan_tasks(struct mem_cgroup *memcg, break; } } -#ifdef CONFIG_MEMCG_QOS - memcg_print_bad_task(arg, ret); -#endif return ret; } @@ -3950,14 +3947,12 @@ bool memcg_low_priority_scan_tasks(int (*fn)(struct task_struct *, void *), return oc->chosen ? true : false; } -void memcg_print_bad_task(void *arg, int ret) +void memcg_print_bad_task(struct oom_control *oc) { - struct oom_control *oc = arg; - if (!static_branch_likely(&memcg_qos_stat_key)) return; - if (!ret && oc->chosen) { + if (oc->chosen) { struct mem_cgroup *memcg; memcg = mem_cgroup_from_task(oc->chosen); @@ -3988,6 +3983,13 @@ int sysctl_memcg_qos_handler(struct ctl_table *table, int write, return ret; } + +#else + +void memcg_print_bad_task(struct oom_control *oc) +{ +} + #endif #ifdef CONFIG_NUMA diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 7eb4fda1ce87..41b1ea3b5703 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -408,9 +408,10 @@ static void select_bad_process(struct oom_control *oc) { oc->chosen_points = LONG_MIN; - if (is_memcg_oom(oc)) - mem_cgroup_scan_tasks(oc->memcg, oom_evaluate_task, oc); - else { + if (is_memcg_oom(oc)) { + if (!mem_cgroup_scan_tasks(oc->memcg, oom_evaluate_task, oc)) + memcg_print_bad_task(oc); + } else { struct task_struct *p; #ifdef CONFIG_MEMCG_QOS @@ -473,9 +474,10 @@ static void dump_tasks(struct oom_control *oc) pr_info("Tasks state (memory values in pages):\n"); pr_info("[ pid ] uid tgid total_vm rss pgtables_bytes swapents oom_score_adj name\n"); - if (is_memcg_oom(oc)) - mem_cgroup_scan_tasks(oc->memcg, dump_task, oc); - else { + if (is_memcg_oom(oc)) { + if (!mem_cgroup_scan_tasks(oc->memcg, dump_task, oc)) + memcg_print_bad_task(oc); + } else { struct task_struct *p; rcu_read_lock(); -- 2.25.1

2 1

[PATCH OLK-5.10] mm/page_alloc: allow high-order pages to be stored on the per-cpu lists
by Tu Jinjiang 19 Jun '23

19 Jun '23

From: Mel Gorman <mgorman(a)techsingularity.net> mainline inclusion from mainline-v5.14-rc1 commit 44042b4498728f4376e84bae1ac8016d146d850b category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I7EQDW CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… ------------------------------------------- The per-cpu page allocator (PCP) only stores order-0 pages. This means that all THP and "cheap" high-order allocations including SLUB contends on the zone->lock. This patch extends the PCP allocator to store THP and "cheap" high-order pages. Note that struct per_cpu_pages increases in size to 256 bytes (4 cache lines) on x86-64. Note that this is not necessarily a universal performance win because of how it is implemented. High-order pages can cause pcp->high to be exceeded prematurely for lower-orders so for example, a large number of THP pages being freed could release order-0 pages from the PCP lists. Hence, much depends on the allocation/free pattern as observed by a single CPU to determine if caching helps or hurts a particular workload. That said, basic performance testing passed. The following is a netperf UDP_STREAM test which hits the relevant patches as some of the network allocations are high-order. netperf-udp 5.13.0-rc2 5.13.0-rc2 mm-pcpburst-v3r4 mm-pcphighorder-v1r7 Hmean send-64 261.46 ( 0.00%) 266.30 * 1.85%* Hmean send-128 516.35 ( 0.00%) 536.78 * 3.96%* Hmean send-256 1014.13 ( 0.00%) 1034.63 * 2.02%* Hmean send-1024 3907.65 ( 0.00%) 4046.11 * 3.54%* Hmean send-2048 7492.93 ( 0.00%) 7754.85 * 3.50%* Hmean send-3312 11410.04 ( 0.00%) 11772.32 * 3.18%* Hmean send-4096 13521.95 ( 0.00%) 13912.34 * 2.89%* Hmean send-8192 21660.50 ( 0.00%) 22730.72 * 4.94%* Hmean send-16384 31902.32 ( 0.00%) 32637.50 * 2.30%* Functionally, a patch like this is necessary to make bulk allocation of high-order pages work with similar performance to order-0 bulk allocations. The bulk allocator is not updated in this series as it would have to be determined by bulk allocation users how they want to track the order of pages allocated with the bulk allocator. Link: https://lkml.kernel.org/r/20210611135753.GC30378@techsingularity.net Signed-off-by: Mel Gorman <mgorman(a)techsingularity.net> Acked-by: Vlastimil Babka <vbabka(a)suse.cz> Cc: Zi Yan <ziy(a)nvidia.com> Cc: Dave Hansen <dave.hansen(a)linux.intel.com> Cc: Michal Hocko <mhocko(a)kernel.org> Cc: Jesper Dangaard Brouer <brouer(a)redhat.com> Signed-off-by: Andrew Morton <akpm(a)linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds(a)linux-foundation.org> Conflicts: include/linux/mmzone.h mm/internal.h mm/page_alloc.c Signed-off-by: Tu Jinjiang <tujinjiang(a)huawei.com> --- include/linux/gfp.h | 2 +- include/linux/mmzone.h | 20 ++++- mm/page_alloc.c | 170 ++++++++++++++++++++++++++++++----------- mm/swap.c | 2 +- 4 files changed, 145 insertions(+), 49 deletions(-) diff --git a/include/linux/gfp.h b/include/linux/gfp.h index 5c3df92a4745..e81a001861dd 100644 --- a/include/linux/gfp.h +++ b/include/linux/gfp.h @@ -600,7 +600,7 @@ void * __meminit alloc_pages_exact_nid(int nid, size_t size, gfp_t gfp_mask); extern void __free_pages(struct page *page, unsigned int order); extern void free_pages(unsigned long addr, unsigned int order); -extern void free_unref_page(struct page *page); +extern void free_unref_page(struct page *page, unsigned int order); extern void free_unref_page_list(struct list_head *list); struct page_frag_cache; diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 0a70b4bdd236..85b91e4f6ebd 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -318,6 +318,24 @@ enum zone_watermarks { NR_WMARK }; +/* + * One per migratetype for each PAGE_ALLOC_COSTLY_ORDER plus one additional + * for pageblock size for THP if configured. + */ +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +#define NR_PCP_THP 1 +#else +#define NR_PCP_THP 0 +#endif +#define NR_PCP_LISTS (MIGRATE_PCPTYPES * (PAGE_ALLOC_COSTLY_ORDER + 1 + NR_PCP_THP)) + +/* + * Shift to encode migratetype and order in the same integer, with order + * in the least significant bits. + */ +#define NR_PCP_ORDER_WIDTH 8 +#define NR_PCP_ORDER_MASK ((1<<NR_PCP_ORDER_WIDTH) - 1) + #define min_wmark_pages(z) (z->_watermark[WMARK_MIN] + z->watermark_boost) #define low_wmark_pages(z) (z->_watermark[WMARK_LOW] + z->watermark_boost) #define high_wmark_pages(z) (z->_watermark[WMARK_HIGH] + z->watermark_boost) @@ -329,7 +347,7 @@ struct per_cpu_pages { int batch; /* chunk size for buddy add/remove */ /* Lists of pages, one per migrate type stored on the pcp-lists */ - struct list_head lists[MIGRATE_PCPTYPES]; + struct list_head lists[NR_PCP_LISTS]; }; struct per_cpu_pageset { diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 12da70f39e0c..e3dbafd45f0c 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -222,6 +222,49 @@ static int __init early_init_on_free(char *buf) } early_param("init_on_free", early_init_on_free); +static inline unsigned int order_to_pindex(int migratetype, int order) +{ + int base = order; + +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + if (order > PAGE_ALLOC_COSTLY_ORDER) { + VM_BUG_ON(order != pageblock_order); + base = PAGE_ALLOC_COSTLY_ORDER + 1; + } +#else + VM_BUG_ON(order > PAGE_ALLOC_COSTLY_ORDER); +#endif + + return (MIGRATE_PCPTYPES * base) + migratetype; +} + +static inline int pindex_to_order(unsigned int pindex) +{ + int order = pindex / MIGRATE_PCPTYPES; + +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + if (order > PAGE_ALLOC_COSTLY_ORDER) { + order = pageblock_order; + VM_BUG_ON(order != pageblock_order); + } +#else + VM_BUG_ON(order > PAGE_ALLOC_COSTLY_ORDER); +#endif + + return order; +} + +static inline bool pcp_allowed_order(unsigned int order) +{ + if (order <= PAGE_ALLOC_COSTLY_ORDER) + return true; +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + if (order == pageblock_order) + return true; +#endif + return false; +} + /* * A cached value of the page's pageblock's migratetype, used when the page is * put on a pcplist. Used to avoid the pageblock migratetype lookup when @@ -693,11 +736,11 @@ static void bad_page(struct page *page, const char *reason) * The first tail page's ->compound_order holds the order of allocation. * This usage means that zero-order pages may not be compound. */ - +static void free_the_page(struct page *page, unsigned int order); void free_compound_page(struct page *page) { mem_cgroup_uncharge(page); - __free_pages_ok(page, compound_order(page), FPI_NONE); + free_the_page(page, compound_order(page)); } void prep_compound_page(struct page *page, unsigned int order) @@ -1294,9 +1337,9 @@ __always_inline bool free_pages_prepare(struct page *page, * to pcp lists. With debug_pagealloc also enabled, they are also rechecked when * moved from pcp lists to free lists. */ -static bool free_pcp_prepare(struct page *page) +static bool free_pcp_prepare(struct page *page, unsigned int order) { - return free_pages_prepare(page, 0, true); + return free_pages_prepare(page, order, true); } static bool bulkfree_pcp_prepare(struct page *page) @@ -1313,12 +1356,12 @@ static bool bulkfree_pcp_prepare(struct page *page) * debug_pagealloc enabled, they are checked also immediately when being freed * to the pcp lists. */ -static bool free_pcp_prepare(struct page *page) +static bool free_pcp_prepare(struct page *page, unsigned int order) { if (debug_pagealloc_enabled_static()) - return free_pages_prepare(page, 0, true); + return free_pages_prepare(page, order, true); else - return free_pages_prepare(page, 0, false); + return free_pages_prepare(page, order, false); } static bool bulkfree_pcp_prepare(struct page *page) @@ -1350,8 +1393,10 @@ static inline void prefetch_buddy(struct page *page) static void free_pcppages_bulk(struct zone *zone, int count, struct per_cpu_pages *pcp) { - int migratetype = 0; + int pindex = 0; int batch_free = 0; + int nr_freed = 0; + unsigned int order; int prefetch_nr = READ_ONCE(pcp->batch); bool isolated_pageblocks; struct page *page, *tmp; @@ -1362,7 +1407,7 @@ static void free_pcppages_bulk(struct zone *zone, int count, * below while (list_empty(list)) loop. */ count = min(pcp->count, count); - while (count) { + while (count > 0) { struct list_head *list; /* @@ -1374,24 +1419,31 @@ static void free_pcppages_bulk(struct zone *zone, int count, */ do { batch_free++; - if (++migratetype == MIGRATE_PCPTYPES) - migratetype = 0; - list = &pcp->lists[migratetype]; + if (++pindex == NR_PCP_LISTS) + pindex = 0; + list = &pcp->lists[pindex]; } while (list_empty(list)); /* This is the only non-empty list. Free them all. */ - if (batch_free == MIGRATE_PCPTYPES) + if (batch_free == NR_PCP_LISTS) batch_free = count; + order = pindex_to_order(pindex); + BUILD_BUG_ON(MAX_ORDER >= (1<<NR_PCP_ORDER_WIDTH)); do { page = list_last_entry(list, struct page, lru); /* must delete to avoid corrupting pcp list */ list_del(&page->lru); - pcp->count--; + nr_freed += 1 << order; + count -= 1 << order; if (bulkfree_pcp_prepare(page)) continue; + /* Encode order with the migratetype */ + page->index <<= NR_PCP_ORDER_WIDTH; + page->index |= order; + list_add_tail(&page->lru, &head); /* @@ -1407,8 +1459,9 @@ static void free_pcppages_bulk(struct zone *zone, int count, prefetch_buddy(page); prefetch_nr--; } - } while (--count && --batch_free && !list_empty(list)); + } while (count > 0 && --batch_free && !list_empty(list)); } + pcp->count -= nr_freed; spin_lock(&zone->lock); isolated_pageblocks = has_isolate_pageblock(zone); @@ -1419,14 +1472,19 @@ static void free_pcppages_bulk(struct zone *zone, int count, */ list_for_each_entry_safe(page, tmp, &head, lru) { int mt = get_pcppage_migratetype(page); + + /* mt has been encoded with the order (see above) */ + order = mt & NR_PCP_ORDER_MASK; + mt >>= NR_PCP_ORDER_WIDTH; + /* MIGRATE_ISOLATE page should not go to pcplists */ VM_BUG_ON_PAGE(is_migrate_isolate(mt), page); /* Pageblock could have been isolated meanwhile */ if (unlikely(isolated_pageblocks)) mt = get_pageblock_migratetype(page); - __free_one_page(page, page_to_pfn(page), zone, 0, mt, FPI_NONE); - trace_mm_page_pcpu_drain(page, 0, mt); + __free_one_page(page, page_to_pfn(page), zone, order, mt, FPI_NONE); + trace_mm_page_pcpu_drain(page, order, mt); } spin_unlock(&zone->lock); } @@ -3182,11 +3240,12 @@ void mark_free_pages(struct zone *zone) } #endif /* CONFIG_PM */ -static bool free_unref_page_prepare(struct page *page, unsigned long pfn) +static bool free_unref_page_prepare(struct page *page, unsigned long pfn, + unsigned int order) { int migratetype; - if (!free_pcp_prepare(page)) + if (!free_pcp_prepare(page, order)) return false; migratetype = get_pfnblock_migratetype(page, pfn); @@ -3194,11 +3253,13 @@ static bool free_unref_page_prepare(struct page *page, unsigned long pfn) return true; } -static void free_unref_page_commit(struct page *page, unsigned long pfn) +static void free_unref_page_commit(struct page *page, unsigned long pfn, + unsigned int order) { struct zone *zone = page_zone(page); struct per_cpu_pages *pcp; int migratetype; + int pindex; migratetype = get_pcppage_migratetype(page); __count_vm_event(PGFREE); @@ -3220,16 +3281,17 @@ static void free_unref_page_commit(struct page *page, unsigned long pfn) } pcp = &this_cpu_ptr(zone->pageset)->pcp; - list_add(&page->lru, &pcp->lists[migratetype]); - pcp->count++; + pindex = order_to_pindex(migratetype, order); + list_add(&page->lru, &pcp->lists[pindex]); + pcp->count += 1 << order; if (pcp->count >= READ_ONCE(pcp->high)) free_pcppages_bulk(zone, READ_ONCE(pcp->batch), pcp); } /* - * Free a 0-order page + * Free a pcp page */ -void free_unref_page(struct page *page) +void free_unref_page(struct page *page, unsigned int order) { unsigned long flags; unsigned long pfn = page_to_pfn(page); @@ -3238,11 +3300,11 @@ void free_unref_page(struct page *page) if (free_page_to_dhugetlb_pool(page)) return; - if (!free_unref_page_prepare(page, pfn)) + if (!free_unref_page_prepare(page, pfn, order)) return; local_irq_save(flags); - free_unref_page_commit(page, pfn); + free_unref_page_commit(page, pfn, order); local_irq_restore(flags); } @@ -3261,7 +3323,7 @@ void free_unref_page_list(struct list_head *list) /* Prepare pages for freeing */ list_for_each_entry_safe(page, next, list, lru) { pfn = page_to_pfn(page); - if (!free_unref_page_prepare(page, pfn)) + if (!free_unref_page_prepare(page, pfn, 0)) list_del(&page->lru); set_page_private(page, pfn); } @@ -3272,7 +3334,7 @@ void free_unref_page_list(struct list_head *list) set_page_private(page, 0); trace_mm_page_free_batched(page); - free_unref_page_commit(page, pfn); + free_unref_page_commit(page, pfn, 0); /* * Guard against excessive IRQ disabled times when we get @@ -3407,7 +3469,8 @@ static inline void zone_statistics(struct zone *preferred_zone, struct zone *z) /* Remove page from the per-cpu list, caller must protect the list */ static inline -struct page *__rmqueue_pcplist(struct zone *zone, int migratetype, +struct page *__rmqueue_pcplist(struct zone *zone, unsigned int order, + int migratetype, unsigned int alloc_flags, struct per_cpu_pages *pcp, struct list_head *list) @@ -3416,16 +3479,30 @@ struct page *__rmqueue_pcplist(struct zone *zone, int migratetype, do { if (list_empty(list)) { - pcp->count += rmqueue_bulk(zone, 0, - READ_ONCE(pcp->batch), list, + int batch = READ_ONCE(pcp->batch); + int alloced; + + /* + * Scale batch relative to order if batch implies + * free pages can be stored on the PCP. Batch can + * be 1 for small zones or for boot pagesets which + * should never store free pages as the pages may + * belong to arbitrary zones. + */ + if (batch > 1) + batch = max(batch >> order, 2); + alloced = rmqueue_bulk(zone, order, + batch, list, migratetype, alloc_flags); + + pcp->count += alloced << order; if (unlikely(list_empty(list))) return NULL; } page = list_first_entry(list, struct page, lru); list_del(&page->lru); - pcp->count--; + pcp->count -= 1 << order; } while (check_new_pcp(page)); return page; @@ -3433,8 +3510,9 @@ struct page *__rmqueue_pcplist(struct zone *zone, int migratetype, /* Lock and remove page from the per-cpu list */ static struct page *rmqueue_pcplist(struct zone *preferred_zone, - struct zone *zone, gfp_t gfp_flags, - int migratetype, unsigned int alloc_flags) + struct zone *zone, unsigned int order, + gfp_t gfp_flags, int migratetype, + unsigned int alloc_flags) { struct per_cpu_pages *pcp; struct list_head *list; @@ -3443,8 +3521,8 @@ static struct page *rmqueue_pcplist(struct zone *preferred_zone, local_irq_save(flags); pcp = &this_cpu_ptr(zone->pageset)->pcp; - list = &pcp->lists[migratetype]; - page = __rmqueue_pcplist(zone, migratetype, alloc_flags, pcp, list); + list = &pcp->lists[order_to_pindex(migratetype, order)]; + page = __rmqueue_pcplist(zone, order, migratetype, alloc_flags, pcp, list); if (page) { __count_zid_vm_events(PGALLOC, page_zonenum(page), 1); zone_statistics(preferred_zone, zone); @@ -3465,15 +3543,15 @@ struct page *rmqueue(struct zone *preferred_zone, unsigned long flags; struct page *page; - if (likely(order == 0)) { + if (likely(pcp_allowed_order(order))) { /* * MIGRATE_MOVABLE pcplist could have the pages on CMA area and * we need to skip it when CMA area isn't allowed. */ if (!IS_ENABLED(CONFIG_CMA) || alloc_flags & ALLOC_CMA || migratetype != MIGRATE_MOVABLE) { - page = rmqueue_pcplist(preferred_zone, zone, gfp_flags, - migratetype, alloc_flags); + page = rmqueue_pcplist(preferred_zone, zone, order, + gfp_flags, migratetype, alloc_flags); goto out; } } @@ -5185,7 +5263,7 @@ unsigned long __alloc_pages_bulk(gfp_t gfp, int preferred_nid, /* Attempt the batch allocation */ local_irq_save(flags); pcp = &this_cpu_ptr(zone->pageset)->pcp; - pcp_list = &pcp->lists[ac.migratetype]; + pcp_list = &pcp->lists[order_to_pindex(ac.migratetype, 0)]; while (nr_populated < nr_pages) { @@ -5195,7 +5273,7 @@ unsigned long __alloc_pages_bulk(gfp_t gfp, int preferred_nid, continue; } - page = __rmqueue_pcplist(zone, ac.migratetype, alloc_flags, + page = __rmqueue_pcplist(zone, 0, ac.migratetype, alloc_flags, pcp, pcp_list); if (unlikely(!page)) { /* Try and get at least one page */ @@ -5454,8 +5532,8 @@ EXPORT_SYMBOL(get_zeroed_page); static inline void free_the_page(struct page *page, unsigned int order) { - if (order == 0) /* Via pcp? */ - free_unref_page(page); + if (pcp_allowed_order(order)) /* Via pcp? */ + free_unref_page(page, order); else __free_pages_ok(page, order, FPI_NONE); } @@ -6873,13 +6951,13 @@ static void pageset_update(struct per_cpu_pages *pcp, unsigned long high, static void pageset_init(struct per_cpu_pageset *p) { struct per_cpu_pages *pcp; - int migratetype; + int pindex; memset(p, 0, sizeof(*p)); pcp = &p->pcp; - for (migratetype = 0; migratetype < MIGRATE_PCPTYPES; migratetype++) - INIT_LIST_HEAD(&pcp->lists[migratetype]); + for (pindex = 0; pindex < NR_PCP_LISTS; pindex++) + INIT_LIST_HEAD(&pcp->lists[pindex]); /* * Set batch and high values safe for a boot pageset. A true percpu diff --git a/mm/swap.c b/mm/swap.c index c37fac5a73e8..d33ec3bb0564 100644 --- a/mm/swap.c +++ b/mm/swap.c @@ -95,7 +95,7 @@ static void __put_single_page(struct page *page) { __page_cache_release(page); mem_cgroup_uncharge(page); - free_unref_page(page); + free_unref_page(page, 0); } static void __put_compound_page(struct page *page) -- 2.25.1

2 1

[PATCH OLK-5.10] posix-cpu-timers: Implement timer_wait_running callback
by Xiongfeng Wang 19 Jun '23

19 Jun '23

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7EQ8B -------------------------------- For posix CPU timers, the .timer_wait_running() callback is missing, which cause WARN_ON() in timer_wait_running(). Commit f7abf14f0001 ("posix-cpu-timers: Implement the missing timer_wait_running callback") solved the problem. But it introduce a kabi broken which is hard to fix. The commit also describe a livelock in preemptible kernel. To fix the livelock, we add cond_resched() in the retry loop. *** below is from origin commit merge tag The reason is that for CONFIG_POSIX_CPU_TIMERS_TASK_WORK enabled systems there is a livelock issue independent of RT. CONFIG_POSIX_CPU_TIMERS_TASK_WORK=y moves the expiry of POSIX CPU timers out from hard interrupt context to task work, which is handled before returning to user space or to a VM. The expiry mechanism moves the expired timers to a stack local list head with sighand lock held. Once sighand is dropped the task can be preempted and a task which wants to delete a timer will spin-wait until the expiry task is scheduled back in. In the worst case this will end up in a livelock when the preempting task and the expiry task are pinned on the same CPU. Signed-off-by: Xiongfeng Wang <wangxiongfeng2(a)huawei.com> --- kernel/time/posix-cpu-timers.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c index c97bc3e3b210..578d0ebedb67 100644 --- a/kernel/time/posix-cpu-timers.c +++ b/kernel/time/posix-cpu-timers.c @@ -1446,6 +1446,9 @@ static int do_cpu_nanosleep(const clockid_t which_clock, int flags, spin_lock_irq(&timer.it_lock); error = posix_cpu_timer_del(&timer); spin_unlock_irq(&timer.it_lock); +#ifdef CONFIG_POSIX_CPU_TIMERS_TASK_WORK + cond_resched(); +#endif } if ((it.it_value.tv_sec | it.it_value.tv_nsec) == 0) { @@ -1546,6 +1549,18 @@ static int thread_cpu_timer_create(struct k_itimer *timer) return posix_cpu_timer_create(timer); } +static void posix_cpu_timer_wait_running(struct k_itimer *timr) +{ +#ifdef CONFIG_POSIX_CPU_TIMERS_TASK_WORK + rcu_read_unlock(); + cond_resched(); + rcu_read_lock(); +#else + cpu_relax(); +#endif +} + + const struct k_clock clock_posix_cpu = { .clock_getres = posix_cpu_clock_getres, .clock_set = posix_cpu_clock_set, @@ -1556,6 +1571,7 @@ const struct k_clock clock_posix_cpu = { .timer_del = posix_cpu_timer_del, .timer_get = posix_cpu_timer_get, .timer_rearm = posix_cpu_timer_rearm, + .timer_wait_running = posix_cpu_timer_wait_running, }; const struct k_clock clock_process = { -- 2.20.1

2 1

[PATCH openEuler-1.0-LTS] fbcon: Check font dimension limits
by Yongqiang Liu 19 Jun '23

19 Jun '23

From: Samuel Thibault <samuel.thibault(a)ens-lyon.org> mainline inclusion from mainline-v6.2-rc7 commit 2b09d5d364986f724f17001ccfe4126b9b43a0be category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I7C2TM CVE: CVE-2023-3161 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- blit_x and blit_y are u32, so fbcon currently cannot support fonts larger than 32x32. The 32x32 case also needs shifting an unsigned int, to properly set bit 31, otherwise we get "UBSAN: shift-out-of-bounds in fbcon_set_font", as reported on: http://lore.kernel.org/all/IA1PR07MB98308653E259A6F2CE94A4AFABCE9@IA1PR07MB… Kernel Branch: 6.2.0-rc5-next-20230124 Kernel config: https://drive.google.com/file/d/1F-LszDAizEEH0ZX0HcSR06v5q8FPl2Uv/view?usp=… Reproducer: https://drive.google.com/file/d/1mP1jcLBY7vWCNM60OMf-ogw-urQRjNrm/view?usp=… Reported-by: Sanan Hasanov <sanan.hasanov(a)Knights.ucf.edu> Signed-off-by: Samuel Thibault <samuel.thibault(a)ens-lyon.org> Fixes: 2d2699d98492 ("fbcon: font setting should check limitation of driver") Cc: stable(a)vger.kernel.org Tested-by: Miko Larsson <mikoxyzzz(a)gmail.com> Reviewed-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Helge Deller <deller(a)gmx.de> Signed-off-by: Zhang Changzhong <zhangchangzhong(a)huawei.com> Reviewed-by: Wang Weiyang <wangweiyang2(a)huawei.com> Reviewed-by: yongqiang Liu <liuyongqiang13(a)huawei.com> Reviewed-by: Zhang Xiaoxu <zhangxiaoxu5(a)huawei.com> Signed-off-by: Yongqiang Liu <liuyongqiang13(a)huawei.com> --- drivers/video/fbdev/core/fbcon.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c index 5ecb90440c81..f5178eefec64 100644 --- a/drivers/video/fbdev/core/fbcon.c +++ b/drivers/video/fbdev/core/fbcon.c @@ -2446,9 +2446,12 @@ static int fbcon_set_font(struct vc_data *vc, struct console_font *font, h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres)) return -EINVAL; + if (font->width > 32 || font->height > 32) + return -EINVAL; + /* Make sure drawing engine can handle the font */ - if (!(info->pixmap.blit_x & (1 << (font->width - 1))) || - !(info->pixmap.blit_y & (1 << (font->height - 1)))) + if (!(info->pixmap.blit_x & BIT(font->width - 1)) || + !(info->pixmap.blit_y & BIT(font->height - 1))) return -EINVAL; /* Make sure driver can handle the font length */ -- 2.25.1

1 0

[PATCH openEuler-1.0-LTS] sched/rt: Fix possible warn when push_rt_task
by Yongqiang Liu 19 Jun '23

19 Jun '23

From: Hui Tang <tanghui20(a)huawei.com> hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7DX9Y CVE: NA ------------------------------- A warn may be triggered during reboot, as follows: reboot ->kernel_restart ->machine_restart ->smp_send_stop --- ipi handler set_cpu_online(cpu, false) balance_callback -> __balance_callback ->push_rt_task -> find_lock_lowest_rq <从vec->mask获取的rq> -> find_lowest_rq -> cpupri_find -> cpupri_find_fitness -> __cpupri_find [cpumask_and(..., vec->mask)] -> set_task_cpu(next_task, lowest_rq->cpu) --- WARN_ON(!oneline(cpu) So add !cpu_online(lowest_rq->cpu) check before set_task_cpu(). The fix does not completely fix the problem, since cpu_online_mask may be cleared after check. Fixes: 4ff9083b8a9a8 ("sched/core: WARN() when migrating to an offline CPU") Signed-off-by: Hui Tang <tanghui20(a)huawei.com> Reviewed-by: Zhang Qiao <zhangqiao22(a)huawei.com> Reviewed-by: Chen Hui <judy.chenhui(a)huawei.com> Signed-off-by: Yongqiang Liu <liuyongqiang13(a)huawei.com> --- kernel/sched/rt.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c index 4d6f1bc86b1b..5dff9a6fe2cf 100644 --- a/kernel/sched/rt.c +++ b/kernel/sched/rt.c @@ -1874,6 +1874,9 @@ static int push_rt_task(struct rq *rq) goto retry; } + if (unlikely(!cpu_online(lowest_rq->cpu))) + goto out; + deactivate_task(rq, next_task, 0); set_task_cpu(next_task, lowest_rq->cpu); activate_task(lowest_rq, next_task, 0); -- 2.25.1

1 0

[PATCH OLK-5.10] fbcon: Check font dimension limits
by Zhang Changzhong 19 Jun '23

19 Jun '23

From: Samuel Thibault <samuel.thibault(a)ens-lyon.org> mainline inclusion from mainline-v6.2-rc7 commit 2b09d5d364986f724f17001ccfe4126b9b43a0be category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I7C2TM CVE: CVE-2023-3161 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- blit_x and blit_y are u32, so fbcon currently cannot support fonts larger than 32x32. The 32x32 case also needs shifting an unsigned int, to properly set bit 31, otherwise we get "UBSAN: shift-out-of-bounds in fbcon_set_font", as reported on: http://lore.kernel.org/all/IA1PR07MB98308653E259A6F2CE94A4AFABCE9@IA1PR07MB… Kernel Branch: 6.2.0-rc5-next-20230124 Kernel config: https://drive.google.com/file/d/1F-LszDAizEEH0ZX0HcSR06v5q8FPl2Uv/view?usp=… Reproducer: https://drive.google.com/file/d/1mP1jcLBY7vWCNM60OMf-ogw-urQRjNrm/view?usp=… Reported-by: Sanan Hasanov <sanan.hasanov(a)Knights.ucf.edu> Signed-off-by: Samuel Thibault <samuel.thibault(a)ens-lyon.org> Fixes: 2d2699d98492 ("fbcon: font setting should check limitation of driver") Cc: stable(a)vger.kernel.org Tested-by: Miko Larsson <mikoxyzzz(a)gmail.com> Reviewed-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Helge Deller <deller(a)gmx.de> Signed-off-by: Zhang Changzhong <zhangchangzhong(a)huawei.com> --- drivers/video/fbdev/core/fbcon.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c index 2618d3b..1a2839e0 100644 --- a/drivers/video/fbdev/core/fbcon.c +++ b/drivers/video/fbdev/core/fbcon.c @@ -2513,9 +2513,12 @@ static int fbcon_set_font(struct vc_data *vc, struct console_font *font, h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres)) return -EINVAL; + if (font->width > 32 || font->height > 32) + return -EINVAL; + /* Make sure drawing engine can handle the font */ - if (!(info->pixmap.blit_x & (1 << (font->width - 1))) || - !(info->pixmap.blit_y & (1 << (font->height - 1)))) + if (!(info->pixmap.blit_x & BIT(font->width - 1)) || + !(info->pixmap.blit_y & BIT(font->height - 1))) return -EINVAL; /* Make sure driver can handle the font length */ -- 2.9.5

2 1

[PATCH openEuler-22.03-LTS] livepatch/powerpc: Fix issue that miss one layer on stack checking
by Zheng Yejian 19 Jun '23

19 Jun '23

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7BMC9 CVE: NA -------------------------------- Suppose task 'T' is running in function 'B', and user is doing livepatch for function 'A', and function 'A' is calling 'B'. Then task 'T' will be interrupted by stop_machine, and suppose that 'B' has not saved the link register (which point to address in 'A') into stack memory, and data in link register position may be invalid, then 'A' would be missed on stack checking. To find a solution, we list following cases (suppose calling chain: P -> A -> B, A runs `bl B`, 'nip' means instruction pointer found in interrupt frame, 'lr' means link register found in interrupt frame, 'frame->pc' means link register saved in first stack frame): 1. 'nip' is in 'A', `bl B` is not executed, then: 'lr' is in 'P', 'frame->pc' should be ignored; 2. 'nip' is in some ppc64_stub or ppc32_plt which also not save link register, then: 'lr' is in 'A', 'frame->pc' should be ignored; 3. 'nip' is in 'B', but 'B' has not saved link register, then: 'lr' is in 'A', 'frame->pc' should be ignored; 4. 'nip' is in 'B', 'B' has saved link register, then: 'lr' is in 'A', 'frame->pc' is also in 'A'; 5. 'nip' is in 'A', 'B' has returned but its stack pointer is not moved, then 'lr' is in 'A', 'frame->pc' is also in 'A'; 6. 'nip' is in 'A', 'B' has returned and its stack pointer is moved, then 'lr' is in 'A', 'frame->pc' is in 'P'. As a conclusion, we need to: 1. check 'nip' or 'lr' or both if they are not in same function; 2. ignore 'frame->pc' if 'nip' and 'lr' are not in same function. Signed-off-by: Zheng Yejian <zhengyejian1(a)huawei.com> Reviewed-by: Xu Kuohai <xukuohai(a)huawei.com> Reviewed-by: Yang Jihong <yangjihong1(a)huawei.com> --- arch/powerpc/kernel/livepatch_32.c | 74 +++++++++++++++++++++++++++++- arch/powerpc/kernel/livepatch_64.c | 57 +++++++++++++++++++++-- 2 files changed, 124 insertions(+), 7 deletions(-) diff --git a/arch/powerpc/kernel/livepatch_32.c b/arch/powerpc/kernel/livepatch_32.c index a3cf41af073e..b8ca50460e07 100644 --- a/arch/powerpc/kernel/livepatch_32.c +++ b/arch/powerpc/kernel/livepatch_32.c @@ -63,8 +63,20 @@ struct klp_func_list { }; struct stackframe { + /* stack frame to be unwinded */ unsigned long sp; + /* link register saved in last stack frame */ unsigned long pc; + /* instruction register saved in pt_regs */ + unsigned long nip; + /* link register saved in pt_regs */ + unsigned long link; + /* stack frame pointer (r1 register) saved in pt_regs */ + unsigned long sfp; + /* check if nip and link are in same function */ + unsigned int nip_link_in_same_func; + /* check if it is top frame before interrupt */ + unsigned int is_top_frame; }; struct walk_stackframe_args { @@ -235,6 +247,22 @@ static int klp_check_activeness_func(struct klp_patch *patch, int enable, return 0; } +static int check_addr_in_same_func(unsigned long addr1, unsigned long addr2) +{ + unsigned long size = 0; + unsigned long offset = 0; + unsigned long start; + + if (addr1 == 0 || addr2 == 0) + return 0; + if (addr1 == addr2) + return 1; + if (!kallsyms_lookup_size_offset(addr1, &size, &offset)) + return 0; + start = addr1 - offset; + return (addr2 >= start) && (addr2 - start < size); +} + static int unwind_frame(struct task_struct *tsk, struct stackframe *frame) { @@ -243,7 +271,35 @@ static int unwind_frame(struct task_struct *tsk, struct stackframe *frame) if (!validate_sp(frame->sp, tsk, STACK_FRAME_OVERHEAD)) return -1; + if (frame->nip != 0) + frame->nip = 0; + if (frame->link != 0) + frame->link = 0; + + frame->is_top_frame = (frame->sfp == frame->sp); stack = (unsigned long *)frame->sp; + + /* + * When switching to the exception stack, + * we save the NIP in pt_regs + * + * See if this is an exception frame. + * We look for the "regshere" marker in the current frame. + */ + if (validate_sp(frame->sp, tsk, STACK_INT_FRAME_SIZE) + && stack[STACK_FRAME_MARKER] == STACK_FRAME_REGS_MARKER) { + struct pt_regs *regs = (struct pt_regs *) + (frame->sp + STACK_FRAME_OVERHEAD); + frame->nip = regs->nip; + frame->link = regs->link; + frame->sfp = regs->gpr[PT_R1]; + frame->nip_link_in_same_func = check_addr_in_same_func(frame->nip, frame->link); + pr_debug("--- interrupt: task = %d/%s, trap %lx at NIP=0x%lx/%pS, LR=0x%lx/%pS, SFP=0x%lx, nip_link_in_same_func=%u\n", + tsk->pid, tsk->comm, regs->trap, + regs->nip, (void *)regs->nip, + regs->link, (void *)regs->link, + frame->sfp, frame->nip_link_in_same_func); + } frame->sp = stack[0]; frame->pc = stack[STACK_FRAME_LR_SAVE]; return 0; @@ -282,9 +338,22 @@ static int klp_check_jump_func(struct stackframe *frame, void *data) struct walk_stackframe_args *args = data; struct klp_func_list *check_funcs = args->check_funcs; - if (!check_func_list(check_funcs, &args->ret, frame->pc)) { + /* check NIP when the exception stack switching */ + if (frame->nip && !check_func_list(check_funcs, &args->ret, frame->nip)) + return args->ret; + if (frame->link && !frame->nip_link_in_same_func && + !check_func_list(check_funcs, &args->ret, frame->link)) return args->ret; + /* + * There are two cases that frame->pc is reliable: + * 1. frame->pc is not in top frame before interrupt; + * 2. nip and link are in same function; + */ + if (!frame->is_top_frame || frame->nip_link_in_same_func) { + if (!check_func_list(check_funcs, &args->ret, frame->pc)) + return args->ret; } + return 0; } @@ -302,7 +371,6 @@ static void free_list(struct klp_func_list **funcs) int klp_check_calltrace(struct klp_patch *patch, int enable) { struct task_struct *g, *t; - struct stackframe frame; unsigned long *stack; int ret = 0; struct klp_func_list *check_funcs = NULL; @@ -318,6 +386,8 @@ int klp_check_calltrace(struct klp_patch *patch, int enable) args.check_funcs = check_funcs; for_each_process_thread(g, t) { + struct stackframe frame = { 0 }; + if (t == current) { /* * Handle the current carefully on each CPUs, we shouldn't diff --git a/arch/powerpc/kernel/livepatch_64.c b/arch/powerpc/kernel/livepatch_64.c index f18cba61a011..d144d119f81a 100644 --- a/arch/powerpc/kernel/livepatch_64.c +++ b/arch/powerpc/kernel/livepatch_64.c @@ -68,9 +68,20 @@ struct klp_func_list { }; struct stackframe { + /* stack frame to be unwinded */ unsigned long sp; + /* link register saved in last stack frame */ unsigned long pc; + /* instruction register saved in pt_regs */ unsigned long nip; + /* link register saved in pt_regs */ + unsigned long link; + /* stack frame pointer (r1 register) saved in pt_regs */ + unsigned long sfp; + /* check if nip and link are in same function */ + unsigned int nip_link_in_same_func; + /* check if it is top frame before interrupt */ + unsigned int is_top_frame; }; struct walk_stackframe_args { @@ -255,6 +266,22 @@ static int klp_check_activeness_func(struct klp_patch *patch, int enable, return 0; } +static int check_addr_in_same_func(unsigned long addr1, unsigned long addr2) +{ + unsigned long size = 0; + unsigned long offset = 0; + unsigned long start; + + if (addr1 == 0 || addr2 == 0) + return 0; + if (addr1 == addr2) + return 1; + if (!kallsyms_lookup_size_offset(addr1, &size, &offset)) + return 0; + start = addr1 - offset; + return (addr2 >= start) && (addr2 - start < size); +} + static int unwind_frame(struct task_struct *tsk, struct stackframe *frame) { @@ -265,7 +292,10 @@ static int unwind_frame(struct task_struct *tsk, struct stackframe *frame) if (frame->nip != 0) frame->nip = 0; + if (frame->link != 0) + frame->link = 0; + frame->is_top_frame = (frame->sfp == frame->sp); stack = (unsigned long *)frame->sp; /* @@ -280,10 +310,14 @@ static int unwind_frame(struct task_struct *tsk, struct stackframe *frame) struct pt_regs *regs = (struct pt_regs *) (frame->sp + STACK_FRAME_OVERHEAD); frame->nip = regs->nip; - pr_debug("--- interrupt: task = %d/%s, trap %lx at NIP=x%lx/%pS, LR=0x%lx/%pS\n", + frame->link = regs->link; + frame->sfp = regs->gpr[PT_R1]; + frame->nip_link_in_same_func = check_addr_in_same_func(frame->nip, frame->link); + pr_debug("--- interrupt: task = %d/%s, trap %lx at NIP=0x%lx/%pS, LR=0x%lx/%pS, SFP=0x%lx, nip_link_in_same_func=%u\n", tsk->pid, tsk->comm, regs->trap, regs->nip, (void *)regs->nip, - regs->link, (void *)regs->link); + regs->link, (void *)regs->link, + frame->sfp, frame->nip_link_in_same_func); } frame->sp = stack[0]; @@ -332,9 +366,22 @@ static int klp_check_jump_func(struct stackframe *frame, void *data) struct walk_stackframe_args *args = data; struct klp_func_list *check_funcs = args->check_funcs; - if (!check_func_list(check_funcs, &args->ret, frame->pc)) { + /* check NIP when the exception stack switching */ + if (frame->nip && !check_func_list(check_funcs, &args->ret, frame->nip)) + return args->ret; + if (frame->link && !frame->nip_link_in_same_func && + !check_func_list(check_funcs, &args->ret, frame->link)) return args->ret; + /* + * There are two cases that frame->pc is reliable: + * 1. frame->pc is not in top frame before interrupt; + * 2. nip and link are in same function; + */ + if (!frame->is_top_frame || frame->nip_link_in_same_func) { + if (!check_func_list(check_funcs, &args->ret, frame->pc)) + return args->ret; } + return 0; } @@ -352,7 +399,6 @@ static void free_list(struct klp_func_list **funcs) int klp_check_calltrace(struct klp_patch *patch, int enable) { struct task_struct *g, *t; - struct stackframe frame; unsigned long *stack; int ret = 0; struct klp_func_list *check_funcs = NULL; @@ -367,6 +413,8 @@ int klp_check_calltrace(struct klp_patch *patch, int enable) args.ret = 0; for_each_process_thread(g, t) { + struct stackframe frame = { 0 }; + if (t == current) { /* * Handle the current carefully on each CPUs, @@ -405,7 +453,6 @@ int klp_check_calltrace(struct klp_patch *patch, int enable) frame.sp = (unsigned long)stack; frame.pc = stack[STACK_FRAME_LR_SAVE]; - frame.nip = 0; if (check_funcs != NULL) { klp_walk_stackframe(&frame, klp_check_jump_func, t, &args); if (args.ret) { -- 2.25.1

2 1

[PATCH OLK-5.10] livepatch/powerpc: Fix issue that miss one layer on stack checking
by Zheng Yejian 19 Jun '23

19 Jun '23

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7BMC9 CVE: NA -------------------------------- Suppose task 'T' is running in function 'B', and user is doing livepatch for function 'A', and function 'A' is calling 'B'. Then task 'T' will be interrupted by stop_machine, and suppose that 'B' has not saved the link register (which point to address in 'A') into stack memory, and data in link register position may be invalid, then 'A' would be missed on stack checking. To find a solution, we list following cases (suppose calling chain: P -> A -> B, A runs `bl B`, 'nip' means instruction pointer found in interrupt frame, 'lr' means link register found in interrupt frame, 'frame->pc' means link register saved in first stack frame): 1. 'nip' is in 'A', `bl B` is not executed, then: 'lr' is in 'P', 'frame->pc' should be ignored; 2. 'nip' is in some ppc64_stub or ppc32_plt which also not save link register, then: 'lr' is in 'A', 'frame->pc' should be ignored; 3. 'nip' is in 'B', but 'B' has not saved link register, then: 'lr' is in 'A', 'frame->pc' should be ignored; 4. 'nip' is in 'B', 'B' has saved link register, then: 'lr' is in 'A', 'frame->pc' is also in 'A'; 5. 'nip' is in 'A', 'B' has returned but its stack pointer is not moved, then 'lr' is in 'A', 'frame->pc' is also in 'A'; 6. 'nip' is in 'A', 'B' has returned and its stack pointer is moved, then 'lr' is in 'A', 'frame->pc' is in 'P'. As a conclusion, we need to: 1. check 'nip' or 'lr' or both if they are not in same function; 2. ignore 'frame->pc' if 'nip' and 'lr' are not in same function. Signed-off-by: Zheng Yejian <zhengyejian1(a)huawei.com> --- arch/powerpc/include/asm/livepatch.h | 11 ++++++++++ arch/powerpc/kernel/livepatch.c | 28 +++++++++++++++++++++++-- arch/powerpc/kernel/livepatch_32.c | 31 +++++++++++++++++++--------- arch/powerpc/kernel/livepatch_64.c | 31 +++++++++++++++++++--------- 4 files changed, 79 insertions(+), 22 deletions(-) diff --git a/arch/powerpc/include/asm/livepatch.h b/arch/powerpc/include/asm/livepatch.h index ae674ea59ab3..285602e637f1 100644 --- a/arch/powerpc/include/asm/livepatch.h +++ b/arch/powerpc/include/asm/livepatch.h @@ -121,9 +121,20 @@ struct arch_klp_data { #define KLP_MAX_REPLACE_SIZE sizeof_field(struct arch_klp_data, old_insns) struct stackframe { + /* stack frame to be unwinded */ unsigned long sp; + /* link register saved in last stack frame */ unsigned long pc; + /* instruction register saved in pt_regs */ unsigned long nip; + /* link register saved in pt_regs */ + unsigned long link; + /* stack frame pointer (r1 register) saved in pt_regs */ + unsigned long sfp; + /* check if nip and link are in same function */ + unsigned int nip_link_in_same_func; + /* check if it is top frame before interrupt */ + unsigned int is_top_frame; }; #ifdef PPC64_ELF_ABI_v1 diff --git a/arch/powerpc/kernel/livepatch.c b/arch/powerpc/kernel/livepatch.c index d568e8c8b16b..5ba38c2c7c5c 100644 --- a/arch/powerpc/kernel/livepatch.c +++ b/arch/powerpc/kernel/livepatch.c @@ -23,6 +23,7 @@ #include <linux/module.h> #include <linux/ftrace.h> #include <linux/livepatch.h> +#include <linux/kallsyms.h> #include <asm/probes.h> #include <asm/livepatch.h> #include <asm/code-patching.h> @@ -67,6 +68,22 @@ int klp_brk_handler(struct pt_regs *regs) return 1; } +static int check_addr_in_same_func(unsigned long addr1, unsigned long addr2) +{ + unsigned long size = 0; + unsigned long offset = 0; + unsigned long start; + + if (addr1 == 0 || addr2 == 0) + return 0; + if (addr1 == addr2) + return 1; + if (!kallsyms_lookup_size_offset(addr1, &size, &offset)) + return 0; + start = addr1 - offset; + return (addr2 >= start) && (addr2 - start < size); +} + int klp_unwind_frame(struct task_struct *tsk, struct stackframe *frame) { unsigned long *stack; @@ -79,7 +96,10 @@ int klp_unwind_frame(struct task_struct *tsk, struct stackframe *frame) if (frame->nip != 0) frame->nip = 0; + if (frame->link != 0) + frame->link = 0; + frame->is_top_frame = (frame->sfp == frame->sp); stack = (unsigned long *)frame->sp; /* @@ -94,10 +114,14 @@ int klp_unwind_frame(struct task_struct *tsk, struct stackframe *frame) struct pt_regs *regs = (struct pt_regs *) (frame->sp + STACK_FRAME_OVERHEAD); frame->nip = regs->nip; - pr_debug("--- interrupt: task = %d/%s, trap %lx at NIP=x%lx/%pS, LR=0x%lx/%pS\n", + frame->link = regs->link; + frame->sfp = regs->gpr[PT_R1]; + frame->nip_link_in_same_func = check_addr_in_same_func(frame->nip, frame->link); + pr_debug("--- interrupt: task = %d/%s, trap %lx at NIP=0x%lx/%pS, LR=0x%lx/%pS, SFP=0x%lx, nip_link_in_same_func=%u\n", tsk->pid, tsk->comm, regs->trap, regs->nip, (void *)regs->nip, - regs->link, (void *)regs->link); + regs->link, (void *)regs->link, + frame->sfp, frame->nip_link_in_same_func); } frame->sp = stack[0]; diff --git a/arch/powerpc/kernel/livepatch_32.c b/arch/powerpc/kernel/livepatch_32.c index 7b4ed23bf2ca..4ca060db93b2 100644 --- a/arch/powerpc/kernel/livepatch_32.c +++ b/arch/powerpc/kernel/livepatch_32.c @@ -254,13 +254,21 @@ static int klp_check_jump_func(struct stackframe *frame, void *data) struct walk_stackframe_args *args = data; struct klp_func_list *check_funcs = args->check_funcs; - /* check the PC first */ - if (!check_func_list(check_funcs, &args->ret, frame->pc)) - return args->ret; - /* check NIP when the exception stack switching */ if (frame->nip && !check_func_list(check_funcs, &args->ret, frame->nip)) return args->ret; + if (frame->link && !frame->nip_link_in_same_func && + !check_func_list(check_funcs, &args->ret, frame->link)) + return args->ret; + /* + * There are two cases that frame->pc is reliable: + * 1. frame->pc is not in top frame before interrupt; + * 2. nip and link are in same function; + */ + if (!frame->is_top_frame || frame->nip_link_in_same_func) { + if (!check_func_list(check_funcs, &args->ret, frame->pc)) + return args->ret; + } return 0; } @@ -280,10 +288,11 @@ static int do_check_calltrace(struct walk_stackframe_args *args, int (*fn)(struct stackframe *, void *)) { struct task_struct *g, *t; - struct stackframe frame; unsigned long *stack; for_each_process_thread(g, t) { + struct stackframe frame = { 0 }; + if (t == current) { /* * Handle the current carefully on each CPUs, we shouldn't @@ -311,7 +320,6 @@ static int do_check_calltrace(struct walk_stackframe_args *args, frame.sp = (unsigned long)stack; frame.pc = stack[STACK_FRAME_LR_SAVE]; - frame.nip = 0; klp_walk_stackframe(&frame, fn, t, args); if (args->ret) { pr_info("PID: %d Comm: %.20s\n", t->pid, t->comm); @@ -350,13 +358,16 @@ static int check_module_calltrace(struct stackframe *frame, void *data) { struct walk_stackframe_args *args = data; - /* check the PC first */ - if (within_module_core(frame->pc, args->mod)) - goto err_out; - /* check NIP when the exception stack switching */ if (frame->nip && within_module_core(frame->nip, args->mod)) goto err_out; + if (frame->link && !frame->nip_link_in_same_func && + within_module_core(frame->link, args->mod)) + goto err_out; + if (!frame->is_top_frame || frame->nip_link_in_same_func) { + if (within_module_core(frame->pc, args->mod)) + goto err_out; + } return 0; diff --git a/arch/powerpc/kernel/livepatch_64.c b/arch/powerpc/kernel/livepatch_64.c index a2ec7c8c1bad..b33839b5916a 100644 --- a/arch/powerpc/kernel/livepatch_64.c +++ b/arch/powerpc/kernel/livepatch_64.c @@ -273,13 +273,21 @@ static int klp_check_jump_func(struct stackframe *frame, void *data) struct walk_stackframe_args *args = data; struct klp_func_list *check_funcs = args->check_funcs; - /* check the PC first */ - if (!check_func_list(check_funcs, &args->ret, frame->pc)) - return args->ret; - /* check NIP when the exception stack switching */ if (frame->nip && !check_func_list(check_funcs, &args->ret, frame->nip)) return args->ret; + if (frame->link && !frame->nip_link_in_same_func && + !check_func_list(check_funcs, &args->ret, frame->link)) + return args->ret; + /* + * There are two cases that frame->pc is reliable: + * 1. frame->pc is not in top frame before interrupt; + * 2. nip and link are in same function; + */ + if (!frame->is_top_frame || frame->nip_link_in_same_func) { + if (!check_func_list(check_funcs, &args->ret, frame->pc)) + return args->ret; + } return 0; } @@ -299,10 +307,11 @@ static int do_check_calltrace(struct walk_stackframe_args *args, int (*fn)(struct stackframe *, void *)) { struct task_struct *g, *t; - struct stackframe frame; unsigned long *stack; for_each_process_thread(g, t) { + struct stackframe frame = { 0 }; + if (t == current) { /* * Handle the current carefully on each CPUs, @@ -332,7 +341,6 @@ static int do_check_calltrace(struct walk_stackframe_args *args, frame.sp = (unsigned long)stack; frame.pc = stack[STACK_FRAME_LR_SAVE]; - frame.nip = 0; klp_walk_stackframe(&frame, fn, t, args); if (args->ret) { pr_debug("%s FAILED when %s\n", __func__, @@ -373,13 +381,16 @@ static int check_module_calltrace(struct stackframe *frame, void *data) { struct walk_stackframe_args *args = data; - /* check the PC first */ - if (within_module_core(frame->pc, args->mod)) - goto err_out; - /* check NIP when the exception stack switching */ if (frame->nip && within_module_core(frame->nip, args->mod)) goto err_out; + if (frame->link && !frame->nip_link_in_same_func && + within_module_core(frame->link, args->mod)) + goto err_out; + if (!frame->is_top_frame || frame->nip_link_in_same_func) { + if (within_module_core(frame->pc, args->mod)) + goto err_out; + } return 0; -- 2.25.1

2 1

[PATCH OLK-5.10 0/1] xhci:fix USB xhci controller issue
by liulongfang 16 Jun '23

16 Jun '23

When the current HiSilicon USB xhci controller formats the faulty U disk, it will trigger a controller exception error. This will cause errors in the control logic of the xhci controller and driver software. In the end, all USB devices on the xhci controller cannot be used. By introducing a noop command operation, restore the logic of the xhci controller and driver software, and restore all USB devices on the xhci controller to normal. Longfang Liu (1): xhci:fix USB xhci controller issue drivers/usb/host/xhci-pci.c | 4 ++++ drivers/usb/host/xhci-ring.c | 6 +++++- drivers/usb/host/xhci.h | 1 + 3 files changed, 10 insertions(+), 1 deletion(-) -- 2.24.0

2 2

[PATCH openEuler-1.0-LTS] net: nsh: Use correct mac_offset to unwind gso skb in nsh_gso_segment()
by Yongqiang Liu 15 Jun '23

15 Jun '23

From: Dong Chenchen <dongchenchen2(a)huawei.com> stable inclusion from stable-v4.19.283 commit d2309e0cb27b6871b273fbc1725e93be62570d86 category: bugfix bugzilla: 188702, https://gitee.com/openeuler/kernel/issues/I7DUPI CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit c83b49383b595be50647f0c764a48c78b5f3c4f8 ] As the call trace shows, skb_panic was caused by wrong skb->mac_header in nsh_gso_segment(): invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 3 PID: 2737 Comm: syz Not tainted 6.3.0-next-20230505 #1 RIP: 0010:skb_panic+0xda/0xe0 call Trace: skb_push+0x91/0xa0 nsh_gso_segment+0x4f3/0x570 skb_mac_gso_segment+0x19e/0x270 __skb_gso_segment+0x1e8/0x3c0 validate_xmit_skb+0x452/0x890 validate_xmit_skb_list+0x99/0xd0 sch_direct_xmit+0x294/0x7c0 __dev_queue_xmit+0x16f0/0x1d70 packet_xmit+0x185/0x210 packet_snd+0xc15/0x1170 packet_sendmsg+0x7b/0xa0 sock_sendmsg+0x14f/0x160 The root cause is: nsh_gso_segment() use skb->network_header - nhoff to reset mac_header in skb_gso_error_unwind() if inner-layer protocol gso fails. However, skb->network_header may be reset by inner-layer protocol gso function e.g. mpls_gso_segment. skb->mac_header reset by the inaccurate network_header will be larger than skb headroom. nsh_gso_segment nhoff = skb->network_header - skb->mac_header; __skb_pull(skb,nsh_len) skb_mac_gso_segment mpls_gso_segment skb_reset_network_header(skb);//skb->network_header+=nsh_len return -EINVAL; skb_gso_error_unwind skb_push(skb, nsh_len); skb->mac_header = skb->network_header - nhoff; // skb->mac_header > skb->headroom, cause skb_push panic Use correct mac_offset to restore mac_header and get rid of nhoff. Fixes: c411ed854584 ("nsh: add GSO support") Reported-by: syzbot+632b5d9964208bfef8c0(a)syzkaller.appspotmail.com Suggested-by: Eric Dumazet <edumazet(a)google.com> Signed-off-by: Dong Chenchen <dongchenchen2(a)huawei.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Dong Chenchen <dongchenchen2(a)huawei.com> Reviewed-by: Yue Haibing <yuehaibing(a)huawei.com> Signed-off-by: Yongqiang Liu <liuyongqiang13(a)huawei.com> --- net/nsh/nsh.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/net/nsh/nsh.c b/net/nsh/nsh.c index 1a30e165eeb4..a5fa25555d7e 100644 --- a/net/nsh/nsh.c +++ b/net/nsh/nsh.c @@ -80,13 +80,12 @@ static struct sk_buff *nsh_gso_segment(struct sk_buff *skb, netdev_features_t features) { struct sk_buff *segs = ERR_PTR(-EINVAL); + u16 mac_offset = skb->mac_header; unsigned int nsh_len, mac_len; __be16 proto; - int nhoff; skb_reset_network_header(skb); - nhoff = skb->network_header - skb->mac_header; mac_len = skb->mac_len; if (unlikely(!pskb_may_pull(skb, NSH_BASE_HDR_LEN))) @@ -111,15 +110,14 @@ static struct sk_buff *nsh_gso_segment(struct sk_buff *skb, segs = skb_mac_gso_segment(skb, features); if (IS_ERR_OR_NULL(segs)) { skb_gso_error_unwind(skb, htons(ETH_P_NSH), nsh_len, - skb->network_header - nhoff, - mac_len); + mac_offset, mac_len); goto out; } for (skb = segs; skb; skb = skb->next) { skb->protocol = htons(ETH_P_NSH); __skb_push(skb, nsh_len); - skb_set_mac_header(skb, -nhoff); + skb->mac_header = mac_offset; skb->network_header = skb->mac_header + mac_len; skb->mac_len = mac_len; } -- 2.25.1

1 0

[PATCH openEuler-1.0-LTS 0/5] Some fixes for smart grid
by Zhang Changzhong 15 Jun '23

15 Jun '23

Some fixes for smart grid, as follows: Hui Tang (5): sched: Add static key to reduce noise sched: fix smart grid usage count sched: fix WARN found by deadlock detect sched: Fix possible deadlock in tg_set_dynamic_affinity_mode sched: Fix negative count for jump label include/linux/sched.h | 1 + include/linux/sched/grid_qos.h | 12 ++++ kernel/cgroup/cpuset.c | 3 + kernel/sched/core.c | 9 +-- kernel/sched/fair.c | 148 +++++++++++++++++++++++++++++------------ kernel/sched/grid/qos.c | 14 ++-- 6 files changed, 132 insertions(+), 55 deletions(-) -- 2.9.5

1 5

[openEuler-22.03-LTS] ipv6: rpl: Fix Route of Death.
by Wang Yufen 15 Jun '23

15 Jun '23

From: Kuniyuki Iwashima <kuniyu(a)amazon.com> mainline inclusion from mainline-v6.4-rc6 commit a2f4c143d76b1a47c91ef9bc46907116b111da0b category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I70CLW CVE: CVE-2023-2156 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- A remote DoS vulnerability of RPL Source Routing is assigned CVE-2023-2156. The Source Routing Header (SRH) has the following format: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Next Header | Hdr Ext Len | Routing Type | Segments Left | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | CmprI | CmprE | Pad | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | . . . Addresses[1..n] . . . | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ The originator of an SRH places the first hop's IPv6 address in the IPv6 header's IPv6 Destination Address and the second hop's IPv6 address as the first address in Addresses[1..n]. The CmprI and CmprE fields indicate the number of prefix octets that are shared with the IPv6 Destination Address. When CmprI or CmprE is not 0, Addresses[1..n] are compressed as follows: 1..n-1 : (16 - CmprI) bytes n : (16 - CmprE) bytes Segments Left indicates the number of route segments remaining. When the value is not zero, the SRH is forwarded to the next hop. Its address is extracted from Addresses[n - Segment Left + 1] and swapped with IPv6 Destination Address. When Segment Left is greater than or equal to 2, the size of SRH is not changed because Addresses[1..n-1] are decompressed and recompressed with CmprI. OTOH, when Segment Left changes from 1 to 0, the new SRH could have a different size because Addresses[1..n-1] are decompressed with CmprI and recompressed with CmprE. Let's say CmprI is 15 and CmprE is 0. When we receive SRH with Segment Left >= 2, Addresses[1..n-1] have 1 byte for each, and Addresses[n] has 16 bytes. When Segment Left is 1, Addresses[1..n-1] is decompressed to 16 bytes and not recompressed. Finally, the new SRH will need more room in the header, and the size is (16 - 1) * (n - 1) bytes. Here the max value of n is 255 as Segment Left is u8, so in the worst case, we have to allocate 3825 bytes in the skb headroom. However, now we only allocate a small fixed buffer that is IPV6_RPL_SRH_WORST_SWAP_SIZE (16 + 7 bytes). If the decompressed size overflows the room, skb_push() hits BUG() below [0]. Instead of allocating the fixed buffer for every packet, let's allocate enough headroom only when we receive SRH with Segment Left 1. [0]: skbuff: skb_under_panic: text:ffffffff81c9f6e2 len:576 put:576 head:ffff8880070b5180 data:ffff8880070b4fb0 tail:0x70 end:0x140 dev:lo kernel BUG at net/core/skbuff.c:200! invalid opcode: 0000 [#1] PREEMPT SMP PTI CPU: 0 PID: 154 Comm: python3 Not tainted 6.4.0-rc4-00190-gc308e9ec0047 #7 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 RIP: 0010:skb_panic (net/core/skbuff.c:200) Code: 4f 70 50 8b 87 bc 00 00 00 50 8b 87 b8 00 00 00 50 ff b7 c8 00 00 00 4c 8b 8f c0 00 00 00 48 c7 c7 80 6e 77 82 e8 ad 8b 60 ff <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90000003da0 EFLAGS: 00000246 RAX: 0000000000000085 RBX: ffff8880058a6600 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff88807dc1c540 RDI: ffff88807dc1c540 RBP: ffffc90000003e48 R08: ffffffff82b392c8 R09: 00000000ffffdfff R10: ffffffff82a592e0 R11: ffffffff82b092e0 R12: ffff888005b1c800 R13: ffff8880070b51b8 R14: ffff888005b1ca18 R15: ffff8880070b5190 FS: 00007f4539f0b740(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055670baf3000 CR3: 0000000005b0e000 CR4: 00000000007506f0 PKRU: 55555554 Call Trace: <IRQ> skb_push (net/core/skbuff.c:210) ipv6_rthdr_rcv (./include/linux/skbuff.h:2880 net/ipv6/exthdrs.c:634 net/ipv6/exthdrs.c:718) ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:437 (discriminator 5)) ip6_input_finish (./include/linux/rcupdate.h:805 net/ipv6/ip6_input.c:483) __netif_receive_skb_one_core (net/core/dev.c:5494) process_backlog (./include/linux/rcupdate.h:805 net/core/dev.c:5934) __napi_poll (net/core/dev.c:6496) net_rx_action (net/core/dev.c:6565 net/core/dev.c:6696) __do_softirq (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/irq.h:142 kernel/softirq.c:572) do_softirq (kernel/softirq.c:472 kernel/softirq.c:459) </IRQ> <TASK> __local_bh_enable_ip (kernel/softirq.c:396) __dev_queue_xmit (net/core/dev.c:4272) ip6_finish_output2 (./include/net/neighbour.h:544 net/ipv6/ip6_output.c:134) rawv6_sendmsg (./include/net/dst.h:458 ./include/linux/netfilter.h:303 net/ipv6/raw.c:656 net/ipv6/raw.c:914) sock_sendmsg (net/socket.c:724 net/socket.c:747) __sys_sendto (net/socket.c:2144) __x64_sys_sendto (net/socket.c:2156 net/socket.c:2152 net/socket.c:2152) do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120) RIP: 0033:0x7f453a138aea Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89 RSP: 002b:00007ffcc212a1c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007ffcc212a288 RCX: 00007f453a138aea RDX: 0000000000000060 RSI: 00007f4539084c20 RDI: 0000000000000003 RBP: 00007f4538308e80 R08: 00007ffcc212a300 R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: ffffffffc4653600 R14: 0000000000000001 R15: 00007f4539712d1b </TASK> Modules linked in: Fixes: 8610c7c6e3bd ("net: ipv6: add support for rpl sr exthdr") Reported-by: Max VA Closes: https://www.interruptlabs.co.uk/articles/linux-ipv6-route-of-death Signed-off-by: Kuniyuki Iwashima <kuniyu(a)amazon.com> Reviewed-by: Eric Dumazet <edumazet(a)google.com> Link: https://lore.kernel.org/r/20230605180617.67284-1-kuniyu@amazon.com Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> Signed-off-by: Wang Yufen <wangyufen(a)huawei.com> --- include/net/rpl.h | 3 --- net/ipv6/exthdrs.c | 29 +++++++++++------------------ 2 files changed, 11 insertions(+), 21 deletions(-) diff --git a/include/net/rpl.h b/include/net/rpl.h index 308ef0a..30fe780 100644 --- a/include/net/rpl.h +++ b/include/net/rpl.h @@ -23,9 +23,6 @@ static inline int rpl_init(void) static inline void rpl_exit(void) {} #endif -/* Worst decompression memory usage ipv6 address (16) + pad 7 */ -#define IPV6_RPL_SRH_WORST_SWAP_SIZE (sizeof(struct in6_addr) + 7) - size_t ipv6_rpl_srh_size(unsigned char n, unsigned char cmpri, unsigned char cmpre); diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c index 4932dea..cdad901 100644 --- a/net/ipv6/exthdrs.c +++ b/net/ipv6/exthdrs.c @@ -552,24 +552,6 @@ static int ipv6_rpl_srh_rcv(struct sk_buff *skb) return -1; } - if (skb_cloned(skb)) { - if (pskb_expand_head(skb, IPV6_RPL_SRH_WORST_SWAP_SIZE, 0, - GFP_ATOMIC)) { - __IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)), - IPSTATS_MIB_OUTDISCARDS); - kfree_skb(skb); - return -1; - } - } else { - err = skb_cow_head(skb, IPV6_RPL_SRH_WORST_SWAP_SIZE); - if (unlikely(err)) { - kfree_skb(skb); - return -1; - } - } - - hdr = (struct ipv6_rpl_sr_hdr *)skb_transport_header(skb); - if (!pskb_may_pull(skb, ipv6_rpl_srh_size(n, hdr->cmpri, hdr->cmpre))) { kfree_skb(skb); @@ -615,6 +597,17 @@ static int ipv6_rpl_srh_rcv(struct sk_buff *skb) skb_pull(skb, ((hdr->hdrlen + 1) << 3)); skb_postpull_rcsum(skb, oldhdr, sizeof(struct ipv6hdr) + ((hdr->hdrlen + 1) << 3)); + if (unlikely(!hdr->segments_left)) { + if (pskb_expand_head(skb, sizeof(struct ipv6hdr) + ((chdr->hdrlen + 1) << 3), 0, + GFP_ATOMIC)) { + __IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_OUTDISCARDS); + kfree_skb(skb); + kfree(buf); + return -1; + } + + oldhdr = ipv6_hdr(skb); + } skb_push(skb, ((chdr->hdrlen + 1) << 3) + sizeof(struct ipv6hdr)); skb_reset_network_header(skb); skb_mac_header_rebuild(skb); -- 1.8.3.1

1 0

[OLK-5.10] ipv6: rpl: Fix Route of Death.
by Wang Yufen 15 Jun '23

15 Jun '23

From: Kuniyuki Iwashima <kuniyu(a)amazon.com> mainline inclusion from mainline-v6.4-rc6 commit a2f4c143d76b1a47c91ef9bc46907116b111da0b category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I70CLW CVE: CVE-2023-2156 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- A remote DoS vulnerability of RPL Source Routing is assigned CVE-2023-2156. The Source Routing Header (SRH) has the following format: 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Next Header | Hdr Ext Len | Routing Type | Segments Left | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | CmprI | CmprE | Pad | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | . . . Addresses[1..n] . . . | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ The originator of an SRH places the first hop's IPv6 address in the IPv6 header's IPv6 Destination Address and the second hop's IPv6 address as the first address in Addresses[1..n]. The CmprI and CmprE fields indicate the number of prefix octets that are shared with the IPv6 Destination Address. When CmprI or CmprE is not 0, Addresses[1..n] are compressed as follows: 1..n-1 : (16 - CmprI) bytes n : (16 - CmprE) bytes Segments Left indicates the number of route segments remaining. When the value is not zero, the SRH is forwarded to the next hop. Its address is extracted from Addresses[n - Segment Left + 1] and swapped with IPv6 Destination Address. When Segment Left is greater than or equal to 2, the size of SRH is not changed because Addresses[1..n-1] are decompressed and recompressed with CmprI. OTOH, when Segment Left changes from 1 to 0, the new SRH could have a different size because Addresses[1..n-1] are decompressed with CmprI and recompressed with CmprE. Let's say CmprI is 15 and CmprE is 0. When we receive SRH with Segment Left >= 2, Addresses[1..n-1] have 1 byte for each, and Addresses[n] has 16 bytes. When Segment Left is 1, Addresses[1..n-1] is decompressed to 16 bytes and not recompressed. Finally, the new SRH will need more room in the header, and the size is (16 - 1) * (n - 1) bytes. Here the max value of n is 255 as Segment Left is u8, so in the worst case, we have to allocate 3825 bytes in the skb headroom. However, now we only allocate a small fixed buffer that is IPV6_RPL_SRH_WORST_SWAP_SIZE (16 + 7 bytes). If the decompressed size overflows the room, skb_push() hits BUG() below [0]. Instead of allocating the fixed buffer for every packet, let's allocate enough headroom only when we receive SRH with Segment Left 1. [0]: skbuff: skb_under_panic: text:ffffffff81c9f6e2 len:576 put:576 head:ffff8880070b5180 data:ffff8880070b4fb0 tail:0x70 end:0x140 dev:lo kernel BUG at net/core/skbuff.c:200! invalid opcode: 0000 [#1] PREEMPT SMP PTI CPU: 0 PID: 154 Comm: python3 Not tainted 6.4.0-rc4-00190-gc308e9ec0047 #7 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 RIP: 0010:skb_panic (net/core/skbuff.c:200) Code: 4f 70 50 8b 87 bc 00 00 00 50 8b 87 b8 00 00 00 50 ff b7 c8 00 00 00 4c 8b 8f c0 00 00 00 48 c7 c7 80 6e 77 82 e8 ad 8b 60 ff <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90000003da0 EFLAGS: 00000246 RAX: 0000000000000085 RBX: ffff8880058a6600 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff88807dc1c540 RDI: ffff88807dc1c540 RBP: ffffc90000003e48 R08: ffffffff82b392c8 R09: 00000000ffffdfff R10: ffffffff82a592e0 R11: ffffffff82b092e0 R12: ffff888005b1c800 R13: ffff8880070b51b8 R14: ffff888005b1ca18 R15: ffff8880070b5190 FS: 00007f4539f0b740(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055670baf3000 CR3: 0000000005b0e000 CR4: 00000000007506f0 PKRU: 55555554 Call Trace: <IRQ> skb_push (net/core/skbuff.c:210) ipv6_rthdr_rcv (./include/linux/skbuff.h:2880 net/ipv6/exthdrs.c:634 net/ipv6/exthdrs.c:718) ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:437 (discriminator 5)) ip6_input_finish (./include/linux/rcupdate.h:805 net/ipv6/ip6_input.c:483) __netif_receive_skb_one_core (net/core/dev.c:5494) process_backlog (./include/linux/rcupdate.h:805 net/core/dev.c:5934) __napi_poll (net/core/dev.c:6496) net_rx_action (net/core/dev.c:6565 net/core/dev.c:6696) __do_softirq (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/irq.h:142 kernel/softirq.c:572) do_softirq (kernel/softirq.c:472 kernel/softirq.c:459) </IRQ> <TASK> __local_bh_enable_ip (kernel/softirq.c:396) __dev_queue_xmit (net/core/dev.c:4272) ip6_finish_output2 (./include/net/neighbour.h:544 net/ipv6/ip6_output.c:134) rawv6_sendmsg (./include/net/dst.h:458 ./include/linux/netfilter.h:303 net/ipv6/raw.c:656 net/ipv6/raw.c:914) sock_sendmsg (net/socket.c:724 net/socket.c:747) __sys_sendto (net/socket.c:2144) __x64_sys_sendto (net/socket.c:2156 net/socket.c:2152 net/socket.c:2152) do_syscall_64 (arch/x86/entry/common.c:50 arch/x86/entry/common.c:80) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120) RIP: 0033:0x7f453a138aea Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89 RSP: 002b:00007ffcc212a1c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007ffcc212a288 RCX: 00007f453a138aea RDX: 0000000000000060 RSI: 00007f4539084c20 RDI: 0000000000000003 RBP: 00007f4538308e80 R08: 00007ffcc212a300 R09: 000000000000001c R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: ffffffffc4653600 R14: 0000000000000001 R15: 00007f4539712d1b </TASK> Modules linked in: Fixes: 8610c7c6e3bd ("net: ipv6: add support for rpl sr exthdr") Reported-by: Max VA Closes: https://www.interruptlabs.co.uk/articles/linux-ipv6-route-of-death Signed-off-by: Kuniyuki Iwashima <kuniyu(a)amazon.com> Reviewed-by: Eric Dumazet <edumazet(a)google.com> Link: https://lore.kernel.org/r/20230605180617.67284-1-kuniyu@amazon.com Signed-off-by: Jakub Kicinski <kuba(a)kernel.org> Signed-off-by: Wang Yufen <wangyufen(a)huawei.com> --- include/net/rpl.h | 3 --- net/ipv6/exthdrs.c | 29 +++++++++++------------------ 2 files changed, 11 insertions(+), 21 deletions(-) diff --git a/include/net/rpl.h b/include/net/rpl.h index 308ef0a..30fe780 100644 --- a/include/net/rpl.h +++ b/include/net/rpl.h @@ -23,9 +23,6 @@ static inline int rpl_init(void) static inline void rpl_exit(void) {} #endif -/* Worst decompression memory usage ipv6 address (16) + pad 7 */ -#define IPV6_RPL_SRH_WORST_SWAP_SIZE (sizeof(struct in6_addr) + 7) - size_t ipv6_rpl_srh_size(unsigned char n, unsigned char cmpri, unsigned char cmpre); diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c index 4932dea..cdad901 100644 --- a/net/ipv6/exthdrs.c +++ b/net/ipv6/exthdrs.c @@ -552,24 +552,6 @@ static int ipv6_rpl_srh_rcv(struct sk_buff *skb) return -1; } - if (skb_cloned(skb)) { - if (pskb_expand_head(skb, IPV6_RPL_SRH_WORST_SWAP_SIZE, 0, - GFP_ATOMIC)) { - __IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)), - IPSTATS_MIB_OUTDISCARDS); - kfree_skb(skb); - return -1; - } - } else { - err = skb_cow_head(skb, IPV6_RPL_SRH_WORST_SWAP_SIZE); - if (unlikely(err)) { - kfree_skb(skb); - return -1; - } - } - - hdr = (struct ipv6_rpl_sr_hdr *)skb_transport_header(skb); - if (!pskb_may_pull(skb, ipv6_rpl_srh_size(n, hdr->cmpri, hdr->cmpre))) { kfree_skb(skb); @@ -615,6 +597,17 @@ static int ipv6_rpl_srh_rcv(struct sk_buff *skb) skb_pull(skb, ((hdr->hdrlen + 1) << 3)); skb_postpull_rcsum(skb, oldhdr, sizeof(struct ipv6hdr) + ((hdr->hdrlen + 1) << 3)); + if (unlikely(!hdr->segments_left)) { + if (pskb_expand_head(skb, sizeof(struct ipv6hdr) + ((chdr->hdrlen + 1) << 3), 0, + GFP_ATOMIC)) { + __IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_OUTDISCARDS); + kfree_skb(skb); + kfree(buf); + return -1; + } + + oldhdr = ipv6_hdr(skb); + } skb_push(skb, ((chdr->hdrlen + 1) << 3) + sizeof(struct ipv6hdr)); skb_reset_network_header(skb); skb_mac_header_rebuild(skb); -- 1.8.3.1

1 0

[PATCH openEuler-1.0-LTS] firewire: fix potential uaf in outbound_phy_packet_callback()
by Yongqiang Liu 15 Jun '23

15 Jun '23

From: Chengfeng Ye <cyeaa(a)connect.ust.hk> stable inclusion from stable-v4.19.242 commit 34380b5647f13fecb458fea9a3eb3d8b3a454709 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I7BYU9 CVE: CVE-2023-3159 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit b7c81f80246fac44077166f3e07103affe6db8ff upstream. &e->event and e point to the same address, and &e->event could be freed in queue_event. So there is a potential uaf issue if we dereference e after calling queue_event(). Fix this by adding a temporary variable to maintain e->client in advance, this can avoid the potential uaf issue. Cc: <stable(a)vger.kernel.org> Signed-off-by: Chengfeng Ye <cyeaa(a)connect.ust.hk> Signed-off-by: Takashi Sakamoto <o-takashi(a)sakamocchi.jp> Link: https://lore.kernel.org/r/20220409041243.603210-2-o-takashi@sakamocchi.jp Signed-off-by: Takashi Iwai <tiwai(a)suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Wei Li <liwei391(a)huawei.com> Reviewed-by: Wang Weiyang <wangweiyang2(a)huawei.com> Reviewed-by: Xiongfeng Wang <wangxiongfeng2(a)huawei.com> Signed-off-by: Yongqiang Liu <liuyongqiang13(a)huawei.com> --- drivers/firewire/core-cdev.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c index 16a7045736a9..3b4a396d76cd 100644 --- a/drivers/firewire/core-cdev.c +++ b/drivers/firewire/core-cdev.c @@ -1495,6 +1495,7 @@ static void outbound_phy_packet_callback(struct fw_packet *packet, { struct outbound_phy_packet_event *e = container_of(packet, struct outbound_phy_packet_event, p); + struct client *e_client; switch (status) { /* expected: */ @@ -1511,9 +1512,10 @@ static void outbound_phy_packet_callback(struct fw_packet *packet, } e->phy_packet.data[0] = packet->timestamp; + e_client = e->client; queue_event(e->client, &e->event, &e->phy_packet, sizeof(e->phy_packet) + e->phy_packet.length, NULL, 0); - client_put(e->client); + client_put(e_client); } static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg) -- 2.25.1

1 0

[PATCH openEuler-22.03-LTS-SP2 v2] tools: add sample sockmap code for redis
by Liu Jian 15 Jun '23

15 Jun '23

hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I7DNAP CVE: N/A ---------------------------------------------------- add sample sockmap code for redis Signed-off-by: Liu Jian <liujian56(a)huawei.com> --- tools/netacc/Makefile | 24 +++ tools/netacc/bpf_sockmap.h | 148 +++++++++++++++++++ tools/netacc/net-acc | 34 +++++ tools/netacc/redis_acc.c | 280 +++++++++++++++++++++++++++++++++++ tools/netacc/redissockmap.c | 287 ++++++++++++++++++++++++++++++++++++ 5 files changed, 773 insertions(+) create mode 100644 tools/netacc/Makefile create mode 100644 tools/netacc/bpf_sockmap.h create mode 100755 tools/netacc/net-acc create mode 100644 tools/netacc/redis_acc.c create mode 100644 tools/netacc/redissockmap.c diff --git a/tools/netacc/Makefile b/tools/netacc/Makefile new file mode 100644 index 000000000000..bf1db37414d8 --- /dev/null +++ b/tools/netacc/Makefile @@ -0,0 +1,24 @@ +# SPDX-License-Identifier: GPL-2.0 + +INSTALL ?= install +CLANG ?= clang +CC ?= gcc +BPFTOOL ?= bpftool +TOPDIR = ../.. +MKFLAGS = -I$(TOPDIR)/tools/lib +LDLIBBPF = -L$(TOPDIR)/tools/lib/bpf/ -l:libbpf.a + +all: + $(CLANG) -O2 -g -Wall -target bpf $(MKFLAGS) -c redissockmap.c -o redissockmap.o + $(BPFTOOL) gen skeleton redissockmap.o > redis_acc.skel.h + $(CC) -O2 -g -Wall $(MKFLAGS) redis_acc.c -o redis_acc $(LDLIBBPF) -lelf -lz + +clean: + rm -f redis_acc + rm -f redis_acc.skel.h + rm -f *.o + +install: + mkdir -p $(INSTALL_ROOT)/usr/sbin/tuned_acc/ + $(INSTALL) -m 755 net-acc $(INSTALL_ROOT)/usr/sbin/ + $(INSTALL) -m 755 redis_acc $(INSTALL_ROOT)/usr/sbin/tuned_acc/ diff --git a/tools/netacc/bpf_sockmap.h b/tools/netacc/bpf_sockmap.h new file mode 100644 index 000000000000..8edcc6624593 --- /dev/null +++ b/tools/netacc/bpf_sockmap.h @@ -0,0 +1,148 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright(c) 2023 Huawei Technologies Co., Ltd + */ + +#ifndef __BPF_SOCKMAP_H__ +#define __BPF_SOCKMAP_H__ + +#include <stddef.h> +#include <stdbool.h> +#include <linux/types.h> +#include <linux/bpf.h> + +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_endian.h> + +#define LOG_DEBUG 0 +#define SOCKMAP_SIZE 100000 + +#if LOG_DEBUG +#define net_dbg bpf_printk +#define net_err bpf_printk +#else +#define net_dbg(fmt, ...) do {} while (0) +#define net_err bpf_printk +#endif + +struct sock_key { + __u32 sip4; + __u32 dip4; + __u32 sport; + __u32 dport; +} __attribute__((packed)); + +struct { + __uint(type, BPF_MAP_TYPE_SOCKHASH); + __type(key, struct sock_key); + __type(value, int); + __uint(max_entries, SOCKMAP_SIZE); + __uint(map_flags, 0); +} redissock_map SEC(".maps"); + +struct sock_info { + __u64 redir_rx_cnt; + __u64 redir_tx_cnt; + int sk_flags; +}; + +struct { + __uint(type, BPF_MAP_TYPE_HASH); + __type(key, struct sock_key); + __type(value, struct sock_info); + __uint(max_entries, SOCKMAP_SIZE); + __uint(map_flags, 0); +} sockflag_map SEC(".maps"); + +static inline void sock_key2peerkey(struct sock_key *key, struct sock_key *peer_key) +{ + peer_key->sip4 = key->dip4; + peer_key->sport = key->dport; + peer_key->dip4 = key->sip4; + peer_key->dport = key->sport; +} + +static inline void extract_key4_from_ops(struct bpf_sock_ops *ops, struct sock_key *key) +{ + key->dip4 = ops->remote_ip4; + key->sip4 = ops->local_ip4; + + // local_port is in host byte order + // and remote_port is in network byte order + key->sport = ops->local_port; + key->dport = bpf_ntohl(ops->remote_port); +} + +static inline void bpf_sock_ops_ipv4(struct bpf_sock_ops *skops) +{ + struct sock_key key = {}; + + extract_key4_from_ops(skops, &key); + bpf_sock_hash_update(skops, &redissock_map, &key, BPF_NOEXIST); +} + +static inline void bpf_sockmap_ipv4_insert(struct bpf_sock_ops *skops) +{ + if (bpf_ntohl(skops->remote_port) == 22 || skops->local_port == 22) + return; + + bpf_sock_ops_ipv4(skops); +} + +static inline void bpf_sockmap_ipv4_cleanup(struct bpf_sock_ops *skops, __u64 *cnt) +{ + struct sock_info *p_skinfo = NULL; + struct sock_key key = {}; + + extract_key4_from_ops(skops, &key); + p_skinfo = bpf_map_lookup_elem(&sockflag_map, &key); + if (p_skinfo) { + if (cnt) + *cnt = p_skinfo->redir_tx_cnt; + bpf_map_delete_elem(&sockflag_map, &key); + } +} + +static inline void extract_key4_from_msg(struct sk_msg_md *msg, struct sock_key *key) +{ + key->sip4 = msg->local_ip4; + key->dip4 = msg->remote_ip4; + + // local_port is in host byte order + // and remote_port is in network byte order + key->sport = msg->local_port; + key->dport = bpf_ntohl(msg->remote_port); +} + +SEC("sk_msg") int redis_redir(struct sk_msg_md *msg) +{ + struct sock_info *p_skinfo = NULL; + struct sock_info skinfo = {0}; + struct sock_key peer_key = {}; + struct sock_key key = {}; + int ret, addinfo = 0; + + extract_key4_from_msg(msg, &key); + sock_key2peerkey(&key, &peer_key); + + p_skinfo = bpf_map_lookup_elem(&sockflag_map, &key); + if (p_skinfo != NULL && p_skinfo->sk_flags == 1) + return SK_PASS; + + if (p_skinfo == NULL) { + addinfo = 1; + p_skinfo = &skinfo; + } + + ret = bpf_msg_redirect_hash(msg, &redissock_map, &peer_key, BPF_F_INGRESS); + if (ret == SK_DROP) { + if (p_skinfo->sk_flags != 1) + p_skinfo->sk_flags = 1; + } + + p_skinfo->redir_tx_cnt++; + if (addinfo) + bpf_map_update_elem(&sockflag_map, &key, p_skinfo, BPF_ANY); + + return SK_PASS; +} +#endif diff --git a/tools/netacc/net-acc b/tools/netacc/net-acc new file mode 100755 index 000000000000..f3db4803ced3 --- /dev/null +++ b/tools/netacc/net-acc @@ -0,0 +1,34 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +function usage() { + echo "" + echo "Usage:" + echo " $0 [enable | disable]" + echo "" +} + +function mount_cgp2() { + CGP2=`mount | grep cgroup2` + if [[ "$CGP2"X == "X" ]]; then + CGP2_PATCH=/sys/fs/cgroup/tunned-acc + mount -o rw,remount /sys/fs/cgroup + mkdir -p ${CGP2_PATCH} + mount -t cgroup2 -o nosuid,nodev,noexec none ${CGP2_PATCH} + mount -o ro,remount /sys/fs/cgroup + fi +} + +CMD=$1 + +if [[ "$CMD"X == "enableX" ]]; then + mount_cgp2 + modprobe localip + /usr/sbin/tuned_acc/redis_acc enable +elif [[ "$CMD"X == "disableX" ]]; then + /usr/sbin/tuned_acc/redis_acc disable + rmmod localip + exit 0 +else + usage; +fi diff --git a/tools/netacc/redis_acc.c b/tools/netacc/redis_acc.c new file mode 100644 index 000000000000..2c41d8b06fac --- /dev/null +++ b/tools/netacc/redis_acc.c @@ -0,0 +1,280 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright(c) 2023 Huawei Technologies Co., Ltd + */ + +#include <argp.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/resource.h> +#include <time.h> +#include <unistd.h> +#include <sys/stat.h> +#include <fcntl.h> + +#include <bpf/libbpf.h> +#include <bpf/bpf.h> +#include "redis_acc.skel.h" + +#ifndef ARRAY_SIZE +#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0])) +#endif + +#define CG_PATH "/sys/fs/cgroup/tunned-acc" +#define PIN_PATH "/sys/fs/bpf/redis/" + +static int bump_memlock_rlimit(void) +{ + struct rlimit rlim_new = { + .rlim_cur = RLIM_INFINITY, + .rlim_max = RLIM_INFINITY, + }; + + return setrlimit(RLIMIT_MEMLOCK, &rlim_new); +} + +struct net_acc_prog_info { + const char *prog_name; + const char *pin_path; + void **prog; + int *fd; +}; + +struct net_acc_map_info { + const char *map_name; + char *pin_path; + void **map; + int *fd; +}; + +struct { + int redis_sockops_fd; + int redis_redir_fd; + int redissock_map_fd; +} net_acc_fds; + +struct { + void *redis_sockops_obj; + void *redis_redir_obj; + void *redissock_map_obj; +} net_acc_obj; + +static struct net_acc_prog_info prog_infos[] = { + { + .prog_name = "redis_sockops", + .pin_path = PIN_PATH"sockops", + .prog = &net_acc_obj.redis_sockops_obj, + .fd = &net_acc_fds.redis_sockops_fd, + }, + { + .prog_name = "redis_redir", + .pin_path = PIN_PATH"sk_msg", + .prog = &net_acc_obj.redis_redir_obj, + .fd = &net_acc_fds.redis_redir_fd, + } +}; + +static struct net_acc_map_info map_infos[] = { + { + .map_name = "redissock_map", + .pin_path = PIN_PATH"redissock_map", + .map = &net_acc_obj.redissock_map_obj, + .fd = &net_acc_fds.redissock_map_fd, + } +}; + +int cg_fd = -1; +struct redissockmap *skel; + +int net_acc_enabled(void) +{ + int map_fd; + + map_fd = bpf_obj_get(map_infos[0].pin_path); + if (map_fd < 0) + return 0; + + close(map_fd); + return 1; +} + +int pin_prog_map(void) +{ + int i, mapj, progj; + int err = 0; + + mapj = ARRAY_SIZE(map_infos); + for (i = 0; i < mapj; i++) { + if (*map_infos[i].map) + err = bpf_map__pin(*map_infos[i].map, map_infos[i].pin_path); + if (err) { + mapj = i; + goto err1; + } + } + + progj = ARRAY_SIZE(prog_infos); + for (i = 0; i < progj; i++) { + if (*prog_infos[i].prog) + err = bpf_program__pin(*prog_infos[i].prog, prog_infos[i].pin_path); + if (err) { + progj = i; + goto err2; + } + } + return 0; +err2: + for (i = 0; i < progj; i++) { + if (*prog_infos[i].prog) + bpf_program__unpin(*prog_infos[i].prog, prog_infos[i].pin_path); + } +err1: + for (i = 0; i < mapj; i++) { + if (*map_infos[i].map) + bpf_map__unpin(*map_infos[i].map, map_infos[i].pin_path); + } + return 1; +} + +int attach_manually(void) +{ + int err; + + err = bpf_prog_attach(bpf_program__fd(skel->progs.redis_sockops), cg_fd, BPF_CGROUP_SOCK_OPS, 0); + if (err) { + fprintf(stderr, "failed to attach sockops programs\n"); + return -1; + } + + err = bpf_prog_attach(bpf_program__fd(skel->progs.redis_redir), + bpf_map__fd(skel->maps.redissock_map), BPF_SK_MSG_VERDICT, 0); + if (err) { + fprintf(stderr, "failed to attach msg_verdict programs\n"); + goto cleanup1; + } + + net_acc_obj.redis_sockops_obj = skel->progs.redis_sockops; + net_acc_obj.redis_redir_obj = skel->progs.redis_redir; + net_acc_obj.redissock_map_obj = skel->maps.redissock_map; + return 0; +cleanup1: + bpf_prog_detach2(bpf_program__fd(skel->progs.redis_sockops), cg_fd, BPF_CGROUP_SOCK_OPS); + return -1; +} + +void detach_manually(void) +{ + bpf_prog_detach2(bpf_program__fd(skel->progs.redis_redir), + bpf_map__fd(skel->maps.redissock_map), BPF_SK_MSG_VERDICT); + bpf_prog_detach2(bpf_program__fd(skel->progs.redis_sockops), cg_fd, BPF_CGROUP_SOCK_OPS); +} + +int net_acc_enable(void) +{ + int err; + + if (net_acc_enabled()) + return 0; + + err = bump_memlock_rlimit(); + if (err) { + fprintf(stderr, "failed to increase rlimit: %d", err); + close(cg_fd); + return 1; + } + + skel = redissockmap__open(); + if (!skel) { + fprintf(stderr, "failed to open and/or load BPF object\n"); + return 1; + } + + err = redissockmap__load(skel); + if (err) { + fprintf(stderr, "failed to load BPF object: %d\n", err); + goto cleanup; + } + + err = redissockmap__attach(skel); + if (err) { + fprintf(stderr, "failed to attach BPF programs\n"); + goto cleanup; + } + + err = attach_manually(); + if (err) { + fprintf(stderr, "failed to attach BPF programs\n"); + goto cleanup; + } + + err = pin_prog_map(); + if (err) { + fprintf(stderr, "failed to pin BPF programs and maps\n"); + goto cleanup1; + } + + return 0; + +cleanup1: + detach_manually(); +cleanup: + redissockmap__destroy(skel); + close(cg_fd); + + return err != 0; +} + + +int net_acc_disable(void) +{ + int i; + + if (!net_acc_enabled()) + return 0; + + for (i = 0; i < ARRAY_SIZE(map_infos); i++) { + if (map_infos[i].fd) { + *map_infos[i].fd = bpf_obj_get(map_infos[i].pin_path); + unlink(map_infos[i].pin_path); + } + } + + for (i = 0; i < ARRAY_SIZE(prog_infos); i++) { + if (prog_infos[i].fd) { + *prog_infos[i].fd = bpf_obj_get(prog_infos[i].pin_path); + unlink(prog_infos[i].pin_path); + } + } + + bpf_prog_detach2(net_acc_fds.redis_redir_fd, + net_acc_fds.redissock_map_fd, BPF_SK_MSG_VERDICT); + bpf_prog_detach2(net_acc_fds.redis_sockops_fd, cg_fd, BPF_CGROUP_SOCK_OPS); + + close(net_acc_fds.redis_redir_fd); + close(net_acc_fds.redis_redir_fd); + close(net_acc_fds.redis_redir_fd); + rmdir(PIN_PATH); + return 0; +} + +int main(int argc, char **argv) +{ + int ret = 1; + + if (argc != 2) + return 1; + + cg_fd = open(CG_PATH, O_DIRECTORY, O_RDONLY); + if (cg_fd < 0) { + fprintf(stderr, "ERROR: (%i) open cgroup2 path failed: %s\n", cg_fd, CG_PATH); + return 1; + } + + if (strncmp(argv[1], "enable", 6) == 0) + ret = net_acc_enable(); + else if (strncmp(argv[1], "disable", 7) == 0) + ret = net_acc_disable(); + + close(cg_fd); + return ret; +} diff --git a/tools/netacc/redissockmap.c b/tools/netacc/redissockmap.c new file mode 100644 index 000000000000..b23df1aa3e6c --- /dev/null +++ b/tools/netacc/redissockmap.c @@ -0,0 +1,287 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright(c) 2023 Huawei Technologies Co., Ltd + */ + +#include "bpf_sockmap.h" + +#define REDIS_BIND_MAP_SIZE 100 +#define BLOCKLIST_SIZE 1000 + +#define ENABLE_BLOCKLIST 0 +#define SHORT_THR 10 +#define BLOCK_THR 10000 + +struct local_ip { + __u32 ip4; +}; + +struct ipaddr_port { + __u32 ip4; + __u32 port; +} __attribute__((packed)); + +#if ENABLE_BLOCKLIST +struct { + __uint(type, BPF_MAP_TYPE_LRU_HASH); + __type(key, struct ipaddr_port); + __type(value, int); + __uint(max_entries, BLOCKLIST_SIZE); + __uint(map_flags, 0); +} blocklist_map SEC(".maps"); +#endif + +struct { + __uint(type, BPF_MAP_TYPE_HASH); + __type(key, struct ipaddr_port); + __type(value, int); + __uint(max_entries, REDIS_BIND_MAP_SIZE); + __uint(map_flags, 0); +} redis_bind_map SEC(".maps"); + + +static inline void extract_ipaddrport_from_ops(struct bpf_sock_ops *skops, + struct ipaddr_port *key1, struct ipaddr_port *key2) +{ + key1->ip4 = skops->remote_ip4; + // remote_port is in network byte order + key1->port = bpf_ntohl(skops->remote_port); + + key2->ip4 = skops->local_ip4; + // local_port is in host byte order + key2->port = skops->local_port; +} + +static inline int __is_redis_sock(struct ipaddr_port *key) +{ + int *pv = NULL; + + pv = bpf_map_lookup_elem(&redis_bind_map, key); + if (pv) + return 1; + + return 0; +} + +static inline int is_redis_sock(struct ipaddr_port *key1, struct ipaddr_port *key2, + struct ipaddr_port *key10, struct ipaddr_port *key20) +{ + net_dbg("is_redis, ip1:0x%x, port1:0x%x\n", key1->ip4, key1->port); + net_dbg("is_redis, ip2:0x%x, port2:0x%x\n", key2->ip4, key2->port); + + if (__is_redis_sock(key1)) + return 1; + + if (__is_redis_sock(key2)) + return 1; + + if (__is_redis_sock(key10)) + return 1; + + if (__is_redis_sock(key20)) + return 1; + + return 0; +} + +static inline int is_localip_sock(struct bpf_sock_ops *skops) +{ + struct local_ip remoteip; + + net_dbg("is_localip, ip1:0x%x, ip2:0x%x\n", + skops->local_ip4, skops->remote_ip4); + + // skops->local_ip4 must be the local IP address + remoteip.ip4 = skops->remote_ip4; + + if ((remoteip.ip4 & 0xff) == 0x7f) + return 1; + + if (!bpf_is_local_ipaddr(remoteip.ip4)) + return 0; + + return 1; +} + +#if ENABLE_BLOCKLIST +static inline int __is_in_block_list(struct ipaddr_port *key) +{ + int *pv = NULL; + + pv = bpf_map_lookup_elem(&blocklist_map, key); + if (pv && *pv > BLOCK_THR) + return 1; + + return 0; +} + +static inline int is_in_block_list(struct ipaddr_port *key1, struct ipaddr_port *key2, + struct ipaddr_port *key10, struct ipaddr_port *key20) +{ + + if (__is_in_block_list(key1)) + return 1; + if (__is_in_block_list(key2)) + return 1; + if (__is_in_block_list(key10)) + return 1; + if (__is_in_block_list(key20)) + return 1; + + return 0; +} + +static inline int __add_task2block_list(struct ipaddr_port *block) +{ + int *pv = NULL; + int value = 1; + + pv = bpf_map_lookup_elem(&blocklist_map, block); + if (pv == NULL) { + bpf_map_update_elem(&blocklist_map, block, &value, BPF_NOEXIST); + return 0; + } + + if (*pv > BLOCK_THR) + return 0; + + *pv += 1; + return 0; +} + +static inline int add_task2block_list(struct bpf_sock_ops *skops) +{ + struct ipaddr_port block1; + struct ipaddr_port block2; + + extract_ipaddrport_from_ops(skops, &block1, &block2); + + if (__is_redis_sock(&block1)) + return __add_task2block_list(&block1); + + if (__is_redis_sock(&block2)) + return __add_task2block_list(&block2); + + block1.ip4 = 0; + if (__is_redis_sock(&block1)) + return __add_task2block_list(&block1); + + block2.ip4 = 0; + if (__is_redis_sock(&block2)) + return __add_task2block_list(&block2); + + return 0; +} +#else +static inline int add_task2block_list(struct bpf_sock_ops *skops) +{ + return 0; +} +static inline int is_in_block_list(struct ipaddr_port *key1, struct ipaddr_port *key2, + struct ipaddr_port *key10, struct ipaddr_port *key20) +{ + return 0; +} +#endif + +static inline int is_redis_loopback_tcp(struct bpf_sock_ops *skops) +{ + struct ipaddr_port key10; + struct ipaddr_port key20; + struct ipaddr_port key1; + struct ipaddr_port key2; + + if (!is_localip_sock(skops)) + return 0; + net_dbg("this is localip\n"); + + extract_ipaddrport_from_ops(skops, &key1, &key2); + key10.ip4 = 0; + key10.port = key1.port; + key20.ip4 = 0; + key20.port = key2.port; + + if (!is_redis_sock(&key1, &key2, &key10, &key20)) + return 0; + net_dbg("this is redis sock\n"); + + if (is_in_block_list(&key1, &key2, &key10, &key20)) + return 0; + + net_dbg("the sock is redis loopback sock\n"); + return 1; +} + +static inline int update_redis_info(struct bpf_sock_ops *skops) +{ + struct ipaddr_port key; + int value = 1; + char comm[16] = {0}; + + bpf_get_current_comm(comm, sizeof(comm)); + if (comm[0] != 'r' || comm[1] != 'e' || comm[2] != 'd' || comm[3] != 'i' || + comm[4] != 's' || comm[5] != '-' || comm[6] != 's' || comm[7] != 'e' || + comm[8] != 'r' || comm[9] != 'v' || comm[10] != 'e' || comm[11] != 'r') + return 0; + + key.ip4 = skops->local_ip4; + key.port = skops->local_port; // host order + + bpf_map_update_elem(&redis_bind_map, &key, &value, BPF_NOEXIST); + net_dbg("%s, update redisinfo: sip:0x%x, sport:%d\n", comm, key.ip4, key.port); + return 1; +} + +static inline void clean_redis_info(struct bpf_sock_ops *skops) +{ + struct ipaddr_port key; + + key.ip4 = skops->local_ip4; + key.port = skops->local_port; // host order + net_dbg("clean redisinfo, 0x%x:%d\n", key.ip4, key.port); + bpf_map_delete_elem(&redis_bind_map, &key); +} + +SEC("sockops") int redis_sockops(struct bpf_sock_ops *skops) +{ + switch (skops->op) { + case BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB: + case BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB: + if (skops->family == 2) {// AF_INET + if (is_redis_loopback_tcp(skops)) { + net_dbg("bpf_sockops, sockmap, op:%d, sk:%p\n", + skops->op, skops->sk); + bpf_sock_ops_cb_flags_set(skops, BPF_SOCK_OPS_STATE_CB_FLAG); + bpf_sockmap_ipv4_insert(skops); + } else { + bpf_sock_ops_cb_flags_set(skops, 0); + } + } + break; + case BPF_SOCK_OPS_STATE_CB: + if (skops->family == 2 && skops->args[0] == BPF_TCP_LISTEN && + skops->args[1] == BPF_TCP_CLOSE) { + clean_redis_info(skops); + } else if (skops->family == 2 && (skops->args[1] == BPF_TCP_CLOSE || + skops->args[1] == BPF_TCP_CLOSE_WAIT || + skops->args[1] == BPF_TCP_FIN_WAIT1)) { + __u64 tx_cnt = SHORT_THR; + + bpf_sockmap_ipv4_cleanup(skops, &tx_cnt); + net_dbg("sockops sk:%p, state:%d, tx_cnt:%llu\n", + skops->sk, skops->args[1], tx_cnt); + if (tx_cnt < SHORT_THR) + add_task2block_list(skops); + } + break; + case BPF_SOCK_OPS_TCP_LISTEN_CB: + if (skops->family == 2 && update_redis_info(skops)) + bpf_sock_ops_cb_flags_set(skops, BPF_SOCK_OPS_STATE_CB_FLAG); + break; + default: + break; + } + return 1; +} + +char _license[] SEC("license") = "GPL"; +int _version SEC("version") = 1; -- 2.34.1

2 1

[PATCH openEuler-22.03-LTS-SP2] tools: add sample sockmap code for redis
by Liu Jian 15 Jun '23

15 Jun '23

hulk inclusion category: feature bugzilla: NA CVE: N/A ---------------------------------------------------- add sample sockmap code for redis Signed-off-by: Liu Jian <liujian56(a)huawei.com> --- tools/netacc/Makefile | 24 +++ tools/netacc/bpf_sockmap.h | 148 +++++++++++++++++++ tools/netacc/net-acc | 34 +++++ tools/netacc/redis_acc.c | 276 ++++++++++++++++++++++++++++++++++ tools/netacc/redissockmap.c | 287 ++++++++++++++++++++++++++++++++++++ 5 files changed, 769 insertions(+) create mode 100644 tools/netacc/Makefile create mode 100644 tools/netacc/bpf_sockmap.h create mode 100755 tools/netacc/net-acc create mode 100644 tools/netacc/redis_acc.c create mode 100644 tools/netacc/redissockmap.c diff --git a/tools/netacc/Makefile b/tools/netacc/Makefile new file mode 100644 index 000000000000..bf1db37414d8 --- /dev/null +++ b/tools/netacc/Makefile @@ -0,0 +1,24 @@ +# SPDX-License-Identifier: GPL-2.0 + +INSTALL ?= install +CLANG ?= clang +CC ?= gcc +BPFTOOL ?= bpftool +TOPDIR = ../.. +MKFLAGS = -I$(TOPDIR)/tools/lib +LDLIBBPF = -L$(TOPDIR)/tools/lib/bpf/ -l:libbpf.a + +all: + $(CLANG) -O2 -g -Wall -target bpf $(MKFLAGS) -c redissockmap.c -o redissockmap.o + $(BPFTOOL) gen skeleton redissockmap.o > redis_acc.skel.h + $(CC) -O2 -g -Wall $(MKFLAGS) redis_acc.c -o redis_acc $(LDLIBBPF) -lelf -lz + +clean: + rm -f redis_acc + rm -f redis_acc.skel.h + rm -f *.o + +install: + mkdir -p $(INSTALL_ROOT)/usr/sbin/tuned_acc/ + $(INSTALL) -m 755 net-acc $(INSTALL_ROOT)/usr/sbin/ + $(INSTALL) -m 755 redis_acc $(INSTALL_ROOT)/usr/sbin/tuned_acc/ diff --git a/tools/netacc/bpf_sockmap.h b/tools/netacc/bpf_sockmap.h new file mode 100644 index 000000000000..8edcc6624593 --- /dev/null +++ b/tools/netacc/bpf_sockmap.h @@ -0,0 +1,148 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright(c) 2023 Huawei Technologies Co., Ltd + */ + +#ifndef __BPF_SOCKMAP_H__ +#define __BPF_SOCKMAP_H__ + +#include <stddef.h> +#include <stdbool.h> +#include <linux/types.h> +#include <linux/bpf.h> + +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_endian.h> + +#define LOG_DEBUG 0 +#define SOCKMAP_SIZE 100000 + +#if LOG_DEBUG +#define net_dbg bpf_printk +#define net_err bpf_printk +#else +#define net_dbg(fmt, ...) do {} while (0) +#define net_err bpf_printk +#endif + +struct sock_key { + __u32 sip4; + __u32 dip4; + __u32 sport; + __u32 dport; +} __attribute__((packed)); + +struct { + __uint(type, BPF_MAP_TYPE_SOCKHASH); + __type(key, struct sock_key); + __type(value, int); + __uint(max_entries, SOCKMAP_SIZE); + __uint(map_flags, 0); +} redissock_map SEC(".maps"); + +struct sock_info { + __u64 redir_rx_cnt; + __u64 redir_tx_cnt; + int sk_flags; +}; + +struct { + __uint(type, BPF_MAP_TYPE_HASH); + __type(key, struct sock_key); + __type(value, struct sock_info); + __uint(max_entries, SOCKMAP_SIZE); + __uint(map_flags, 0); +} sockflag_map SEC(".maps"); + +static inline void sock_key2peerkey(struct sock_key *key, struct sock_key *peer_key) +{ + peer_key->sip4 = key->dip4; + peer_key->sport = key->dport; + peer_key->dip4 = key->sip4; + peer_key->dport = key->sport; +} + +static inline void extract_key4_from_ops(struct bpf_sock_ops *ops, struct sock_key *key) +{ + key->dip4 = ops->remote_ip4; + key->sip4 = ops->local_ip4; + + // local_port is in host byte order + // and remote_port is in network byte order + key->sport = ops->local_port; + key->dport = bpf_ntohl(ops->remote_port); +} + +static inline void bpf_sock_ops_ipv4(struct bpf_sock_ops *skops) +{ + struct sock_key key = {}; + + extract_key4_from_ops(skops, &key); + bpf_sock_hash_update(skops, &redissock_map, &key, BPF_NOEXIST); +} + +static inline void bpf_sockmap_ipv4_insert(struct bpf_sock_ops *skops) +{ + if (bpf_ntohl(skops->remote_port) == 22 || skops->local_port == 22) + return; + + bpf_sock_ops_ipv4(skops); +} + +static inline void bpf_sockmap_ipv4_cleanup(struct bpf_sock_ops *skops, __u64 *cnt) +{ + struct sock_info *p_skinfo = NULL; + struct sock_key key = {}; + + extract_key4_from_ops(skops, &key); + p_skinfo = bpf_map_lookup_elem(&sockflag_map, &key); + if (p_skinfo) { + if (cnt) + *cnt = p_skinfo->redir_tx_cnt; + bpf_map_delete_elem(&sockflag_map, &key); + } +} + +static inline void extract_key4_from_msg(struct sk_msg_md *msg, struct sock_key *key) +{ + key->sip4 = msg->local_ip4; + key->dip4 = msg->remote_ip4; + + // local_port is in host byte order + // and remote_port is in network byte order + key->sport = msg->local_port; + key->dport = bpf_ntohl(msg->remote_port); +} + +SEC("sk_msg") int redis_redir(struct sk_msg_md *msg) +{ + struct sock_info *p_skinfo = NULL; + struct sock_info skinfo = {0}; + struct sock_key peer_key = {}; + struct sock_key key = {}; + int ret, addinfo = 0; + + extract_key4_from_msg(msg, &key); + sock_key2peerkey(&key, &peer_key); + + p_skinfo = bpf_map_lookup_elem(&sockflag_map, &key); + if (p_skinfo != NULL && p_skinfo->sk_flags == 1) + return SK_PASS; + + if (p_skinfo == NULL) { + addinfo = 1; + p_skinfo = &skinfo; + } + + ret = bpf_msg_redirect_hash(msg, &redissock_map, &peer_key, BPF_F_INGRESS); + if (ret == SK_DROP) { + if (p_skinfo->sk_flags != 1) + p_skinfo->sk_flags = 1; + } + + p_skinfo->redir_tx_cnt++; + if (addinfo) + bpf_map_update_elem(&sockflag_map, &key, p_skinfo, BPF_ANY); + + return SK_PASS; +} +#endif diff --git a/tools/netacc/net-acc b/tools/netacc/net-acc new file mode 100755 index 000000000000..f3db4803ced3 --- /dev/null +++ b/tools/netacc/net-acc @@ -0,0 +1,34 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +function usage() { + echo "" + echo "Usage:" + echo " $0 [enable | disable]" + echo "" +} + +function mount_cgp2() { + CGP2=`mount | grep cgroup2` + if [[ "$CGP2"X == "X" ]]; then + CGP2_PATCH=/sys/fs/cgroup/tunned-acc + mount -o rw,remount /sys/fs/cgroup + mkdir -p ${CGP2_PATCH} + mount -t cgroup2 -o nosuid,nodev,noexec none ${CGP2_PATCH} + mount -o ro,remount /sys/fs/cgroup + fi +} + +CMD=$1 + +if [[ "$CMD"X == "enableX" ]]; then + mount_cgp2 + modprobe localip + /usr/sbin/tuned_acc/redis_acc enable +elif [[ "$CMD"X == "disableX" ]]; then + /usr/sbin/tuned_acc/redis_acc disable + rmmod localip + exit 0 +else + usage; +fi diff --git a/tools/netacc/redis_acc.c b/tools/netacc/redis_acc.c new file mode 100644 index 000000000000..ae81ec56ea7e --- /dev/null +++ b/tools/netacc/redis_acc.c @@ -0,0 +1,276 @@ +#include <argp.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/resource.h> +#include <time.h> +#include <unistd.h> +#include <sys/stat.h> +#include <fcntl.h> + +#include <bpf/libbpf.h> +#include <bpf/bpf.h> +#include "redis_acc.skel.h" + +#ifndef ARRAY_SIZE +#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0])) +#endif + +#define CG_PATH "/sys/fs/cgroup/tunned-acc" +#define PIN_PATH "/sys/fs/bpf/redis/" + +static int bump_memlock_rlimit(void) +{ + struct rlimit rlim_new = { + .rlim_cur = RLIM_INFINITY, + .rlim_max = RLIM_INFINITY, + }; + + return setrlimit(RLIMIT_MEMLOCK, &rlim_new); +} + +struct net_acc_prog_info { + const char *prog_name; + const char *pin_path; + void **prog; + int *fd; +}; + +struct net_acc_map_info { + const char *map_name; + char *pin_path; + void **map; + int *fd; +}; + +struct { + int redis_sockops_fd; + int redis_redir_fd; + int redissock_map_fd; +} net_acc_fds; + +struct { + void *redis_sockops_obj; + void *redis_redir_obj; + void *redissock_map_obj; +} net_acc_obj; + +static struct net_acc_prog_info prog_infos[] = { + { + .prog_name = "redis_sockops", + .pin_path = PIN_PATH"sockops", + .prog = &net_acc_obj.redis_sockops_obj, + .fd = &net_acc_fds.redis_sockops_fd, + }, + { + .prog_name = "redis_redir", + .pin_path = PIN_PATH"sk_msg", + .prog = &net_acc_obj.redis_redir_obj, + .fd = &net_acc_fds.redis_redir_fd, + } +}; + +static struct net_acc_map_info map_infos[] = { + { + .map_name = "redissock_map", + .pin_path = PIN_PATH"redissock_map", + .map = &net_acc_obj.redissock_map_obj, + .fd = &net_acc_fds.redissock_map_fd, + } +}; + +int cg_fd = -1; +struct redissockmap *skel; + +int net_acc_enabled(void) +{ + int map_fd; + + map_fd = bpf_obj_get(map_infos[0].pin_path); + if (map_fd < 0) + return 0; + + close(map_fd); + return 1; +} + +int pin_prog_map(void) +{ + int i, mapj, progj; + int err = 0; + + mapj = ARRAY_SIZE(map_infos); + for (i = 0; i < mapj; i++) { + if (*map_infos[i].map) + err = bpf_map__pin(*map_infos[i].map, map_infos[i].pin_path); + if (err) { + mapj = i; + goto err1; + } + } + + progj = ARRAY_SIZE(prog_infos); + for (i = 0; i < progj; i++) { + if (*prog_infos[i].prog) + err = bpf_program__pin(*prog_infos[i].prog, prog_infos[i].pin_path); + if (err) { + progj = i; + goto err2; + } + } + return 0; +err2: + for (i = 0; i < progj; i++) { + if (*prog_infos[i].prog) + bpf_program__unpin(*prog_infos[i].prog, prog_infos[i].pin_path); + } +err1: + for (i = 0; i < mapj; i++) { + if (*map_infos[i].map) + bpf_map__unpin(*map_infos[i].map, map_infos[i].pin_path); + } + return 1; +} + +int attach_manually(void) +{ + int err; + + err = bpf_prog_attach(bpf_program__fd(skel->progs.redis_sockops), cg_fd, BPF_CGROUP_SOCK_OPS, 0); + if (err) { + fprintf(stderr, "failed to attach sockops programs\n"); + return -1; + } + + err = bpf_prog_attach(bpf_program__fd(skel->progs.redis_redir), + bpf_map__fd(skel->maps.redissock_map), BPF_SK_MSG_VERDICT, 0); + if (err) { + fprintf(stderr, "failed to attach msg_verdict programs\n"); + goto cleanup1; + } + + net_acc_obj.redis_sockops_obj = skel->progs.redis_sockops; + net_acc_obj.redis_redir_obj = skel->progs.redis_redir; + net_acc_obj.redissock_map_obj = skel->maps.redissock_map; + return 0; +cleanup1: + bpf_prog_detach2(bpf_program__fd(skel->progs.redis_sockops), cg_fd, BPF_CGROUP_SOCK_OPS); + return -1; +} + +void detach_manually(void) +{ + bpf_prog_detach2(bpf_program__fd(skel->progs.redis_redir), + bpf_map__fd(skel->maps.redissock_map), BPF_SK_MSG_VERDICT); + bpf_prog_detach2(bpf_program__fd(skel->progs.redis_sockops), cg_fd, BPF_CGROUP_SOCK_OPS); +} + +int net_acc_enable(void) +{ + int err; + + if (net_acc_enabled()) + return 0; + + err = bump_memlock_rlimit(); + if (err) { + fprintf(stderr, "failed to increase rlimit: %d", err); + close(cg_fd); + return 1; + } + + skel = redissockmap__open(); + if (!skel) { + fprintf(stderr, "failed to open and/or load BPF object\n"); + return 1; + } + + err = redissockmap__load(skel); + if (err) { + fprintf(stderr, "failed to load BPF object: %d\n", err); + goto cleanup; + } + + err = redissockmap__attach(skel); + if (err) { + fprintf(stderr, "failed to attach BPF programs\n"); + goto cleanup; + } + + err = attach_manually(); + if (err) { + fprintf(stderr, "failed to attach BPF programs\n"); + goto cleanup; + } + + err = pin_prog_map(); + if (err) { + fprintf(stderr, "failed to pin BPF programs and maps\n"); + goto cleanup1; + } + + return 0; + +cleanup1: + detach_manually(); +cleanup: + redissockmap__destroy(skel); + close(cg_fd); + + return err != 0; +} + + +int net_acc_disable(void) +{ + int i; + + if (!net_acc_enabled()) + return 0; + + for (i = 0; i < ARRAY_SIZE(map_infos); i++) { + if (map_infos[i].fd) { + *map_infos[i].fd = bpf_obj_get(map_infos[i].pin_path); + unlink(map_infos[i].pin_path); + } + } + + for (i = 0; i < ARRAY_SIZE(prog_infos); i++) { + if (prog_infos[i].fd) { + *prog_infos[i].fd = bpf_obj_get(prog_infos[i].pin_path); + unlink(prog_infos[i].pin_path); + } + } + + bpf_prog_detach2(net_acc_fds.redis_redir_fd, + net_acc_fds.redissock_map_fd, BPF_SK_MSG_VERDICT); + bpf_prog_detach2(net_acc_fds.redis_sockops_fd, cg_fd, BPF_CGROUP_SOCK_OPS); + + close(net_acc_fds.redis_redir_fd); + close(net_acc_fds.redis_redir_fd); + close(net_acc_fds.redis_redir_fd); + rmdir(PIN_PATH); + return 0; +} + +int main(int argc, char **argv) +{ + int ret = 1; + + if (argc != 2) + return 1; + + cg_fd = open(CG_PATH, O_DIRECTORY, O_RDONLY); + if (cg_fd < 0) { + fprintf(stderr, "ERROR: (%i) open cgroup2 path failed: %s\n", cg_fd, CG_PATH); + return 1; + } + + if (strncmp(argv[1], "enable", 6) == 0) + ret = net_acc_enable(); + else if (strncmp(argv[1], "disable", 7) == 0) + ret = net_acc_disable(); + + close(cg_fd); + return ret; +} diff --git a/tools/netacc/redissockmap.c b/tools/netacc/redissockmap.c new file mode 100644 index 000000000000..b23df1aa3e6c --- /dev/null +++ b/tools/netacc/redissockmap.c @@ -0,0 +1,287 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright(c) 2023 Huawei Technologies Co., Ltd + */ + +#include "bpf_sockmap.h" + +#define REDIS_BIND_MAP_SIZE 100 +#define BLOCKLIST_SIZE 1000 + +#define ENABLE_BLOCKLIST 0 +#define SHORT_THR 10 +#define BLOCK_THR 10000 + +struct local_ip { + __u32 ip4; +}; + +struct ipaddr_port { + __u32 ip4; + __u32 port; +} __attribute__((packed)); + +#if ENABLE_BLOCKLIST +struct { + __uint(type, BPF_MAP_TYPE_LRU_HASH); + __type(key, struct ipaddr_port); + __type(value, int); + __uint(max_entries, BLOCKLIST_SIZE); + __uint(map_flags, 0); +} blocklist_map SEC(".maps"); +#endif + +struct { + __uint(type, BPF_MAP_TYPE_HASH); + __type(key, struct ipaddr_port); + __type(value, int); + __uint(max_entries, REDIS_BIND_MAP_SIZE); + __uint(map_flags, 0); +} redis_bind_map SEC(".maps"); + + +static inline void extract_ipaddrport_from_ops(struct bpf_sock_ops *skops, + struct ipaddr_port *key1, struct ipaddr_port *key2) +{ + key1->ip4 = skops->remote_ip4; + // remote_port is in network byte order + key1->port = bpf_ntohl(skops->remote_port); + + key2->ip4 = skops->local_ip4; + // local_port is in host byte order + key2->port = skops->local_port; +} + +static inline int __is_redis_sock(struct ipaddr_port *key) +{ + int *pv = NULL; + + pv = bpf_map_lookup_elem(&redis_bind_map, key); + if (pv) + return 1; + + return 0; +} + +static inline int is_redis_sock(struct ipaddr_port *key1, struct ipaddr_port *key2, + struct ipaddr_port *key10, struct ipaddr_port *key20) +{ + net_dbg("is_redis, ip1:0x%x, port1:0x%x\n", key1->ip4, key1->port); + net_dbg("is_redis, ip2:0x%x, port2:0x%x\n", key2->ip4, key2->port); + + if (__is_redis_sock(key1)) + return 1; + + if (__is_redis_sock(key2)) + return 1; + + if (__is_redis_sock(key10)) + return 1; + + if (__is_redis_sock(key20)) + return 1; + + return 0; +} + +static inline int is_localip_sock(struct bpf_sock_ops *skops) +{ + struct local_ip remoteip; + + net_dbg("is_localip, ip1:0x%x, ip2:0x%x\n", + skops->local_ip4, skops->remote_ip4); + + // skops->local_ip4 must be the local IP address + remoteip.ip4 = skops->remote_ip4; + + if ((remoteip.ip4 & 0xff) == 0x7f) + return 1; + + if (!bpf_is_local_ipaddr(remoteip.ip4)) + return 0; + + return 1; +} + +#if ENABLE_BLOCKLIST +static inline int __is_in_block_list(struct ipaddr_port *key) +{ + int *pv = NULL; + + pv = bpf_map_lookup_elem(&blocklist_map, key); + if (pv && *pv > BLOCK_THR) + return 1; + + return 0; +} + +static inline int is_in_block_list(struct ipaddr_port *key1, struct ipaddr_port *key2, + struct ipaddr_port *key10, struct ipaddr_port *key20) +{ + + if (__is_in_block_list(key1)) + return 1; + if (__is_in_block_list(key2)) + return 1; + if (__is_in_block_list(key10)) + return 1; + if (__is_in_block_list(key20)) + return 1; + + return 0; +} + +static inline int __add_task2block_list(struct ipaddr_port *block) +{ + int *pv = NULL; + int value = 1; + + pv = bpf_map_lookup_elem(&blocklist_map, block); + if (pv == NULL) { + bpf_map_update_elem(&blocklist_map, block, &value, BPF_NOEXIST); + return 0; + } + + if (*pv > BLOCK_THR) + return 0; + + *pv += 1; + return 0; +} + +static inline int add_task2block_list(struct bpf_sock_ops *skops) +{ + struct ipaddr_port block1; + struct ipaddr_port block2; + + extract_ipaddrport_from_ops(skops, &block1, &block2); + + if (__is_redis_sock(&block1)) + return __add_task2block_list(&block1); + + if (__is_redis_sock(&block2)) + return __add_task2block_list(&block2); + + block1.ip4 = 0; + if (__is_redis_sock(&block1)) + return __add_task2block_list(&block1); + + block2.ip4 = 0; + if (__is_redis_sock(&block2)) + return __add_task2block_list(&block2); + + return 0; +} +#else +static inline int add_task2block_list(struct bpf_sock_ops *skops) +{ + return 0; +} +static inline int is_in_block_list(struct ipaddr_port *key1, struct ipaddr_port *key2, + struct ipaddr_port *key10, struct ipaddr_port *key20) +{ + return 0; +} +#endif + +static inline int is_redis_loopback_tcp(struct bpf_sock_ops *skops) +{ + struct ipaddr_port key10; + struct ipaddr_port key20; + struct ipaddr_port key1; + struct ipaddr_port key2; + + if (!is_localip_sock(skops)) + return 0; + net_dbg("this is localip\n"); + + extract_ipaddrport_from_ops(skops, &key1, &key2); + key10.ip4 = 0; + key10.port = key1.port; + key20.ip4 = 0; + key20.port = key2.port; + + if (!is_redis_sock(&key1, &key2, &key10, &key20)) + return 0; + net_dbg("this is redis sock\n"); + + if (is_in_block_list(&key1, &key2, &key10, &key20)) + return 0; + + net_dbg("the sock is redis loopback sock\n"); + return 1; +} + +static inline int update_redis_info(struct bpf_sock_ops *skops) +{ + struct ipaddr_port key; + int value = 1; + char comm[16] = {0}; + + bpf_get_current_comm(comm, sizeof(comm)); + if (comm[0] != 'r' || comm[1] != 'e' || comm[2] != 'd' || comm[3] != 'i' || + comm[4] != 's' || comm[5] != '-' || comm[6] != 's' || comm[7] != 'e' || + comm[8] != 'r' || comm[9] != 'v' || comm[10] != 'e' || comm[11] != 'r') + return 0; + + key.ip4 = skops->local_ip4; + key.port = skops->local_port; // host order + + bpf_map_update_elem(&redis_bind_map, &key, &value, BPF_NOEXIST); + net_dbg("%s, update redisinfo: sip:0x%x, sport:%d\n", comm, key.ip4, key.port); + return 1; +} + +static inline void clean_redis_info(struct bpf_sock_ops *skops) +{ + struct ipaddr_port key; + + key.ip4 = skops->local_ip4; + key.port = skops->local_port; // host order + net_dbg("clean redisinfo, 0x%x:%d\n", key.ip4, key.port); + bpf_map_delete_elem(&redis_bind_map, &key); +} + +SEC("sockops") int redis_sockops(struct bpf_sock_ops *skops) +{ + switch (skops->op) { + case BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB: + case BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB: + if (skops->family == 2) {// AF_INET + if (is_redis_loopback_tcp(skops)) { + net_dbg("bpf_sockops, sockmap, op:%d, sk:%p\n", + skops->op, skops->sk); + bpf_sock_ops_cb_flags_set(skops, BPF_SOCK_OPS_STATE_CB_FLAG); + bpf_sockmap_ipv4_insert(skops); + } else { + bpf_sock_ops_cb_flags_set(skops, 0); + } + } + break; + case BPF_SOCK_OPS_STATE_CB: + if (skops->family == 2 && skops->args[0] == BPF_TCP_LISTEN && + skops->args[1] == BPF_TCP_CLOSE) { + clean_redis_info(skops); + } else if (skops->family == 2 && (skops->args[1] == BPF_TCP_CLOSE || + skops->args[1] == BPF_TCP_CLOSE_WAIT || + skops->args[1] == BPF_TCP_FIN_WAIT1)) { + __u64 tx_cnt = SHORT_THR; + + bpf_sockmap_ipv4_cleanup(skops, &tx_cnt); + net_dbg("sockops sk:%p, state:%d, tx_cnt:%llu\n", + skops->sk, skops->args[1], tx_cnt); + if (tx_cnt < SHORT_THR) + add_task2block_list(skops); + } + break; + case BPF_SOCK_OPS_TCP_LISTEN_CB: + if (skops->family == 2 && update_redis_info(skops)) + bpf_sock_ops_cb_flags_set(skops, BPF_SOCK_OPS_STATE_CB_FLAG); + break; + default: + break; + } + return 1; +} + +char _license[] SEC("license") = "GPL"; +int _version SEC("version") = 1; -- 2.34.1

2 1

[PATCH OLK-5.10] gfs2: Don't deref jdesc in evict
by ZhaoLong Wang 14 Jun '23

14 Jun '23

From: Bob Peterson <rpeterso(a)redhat.com> mainline inclusion from mainline-v6.4-rc2 commit 504a10d9e46bc37b23d0a1ae2f28973c8516e636 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I7CXJL CVE: CVE-2023-3212 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- On corrupt gfs2 file systems the evict code can try to reference the journal descriptor structure, jdesc, after it has been freed and set to NULL. The sequence of events is: init_journal() ... fail_jindex: gfs2_jindex_free(sdp); <------frees journals, sets jdesc = NULL if (gfs2_holder_initialized(&ji_gh)) gfs2_glock_dq_uninit(&ji_gh); fail: iput(sdp->sd_jindex); <--references jdesc in evict_linked_inode evict() gfs2_evict_inode() evict_linked_inode() ret = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks); <------references the now freed/zeroed sd_jdesc pointer. The call to gfs2_trans_begin is done because the truncate_inode_pages call can cause gfs2 events that require a transaction, such as removing journaled data (jdata) blocks from the journal. This patch fixes the problem by adding a check for sdp->sd_jdesc to function gfs2_evict_inode. In theory, this should only happen to corrupt gfs2 file systems, when gfs2 detects the problem, reports it, then tries to evict all the system inodes it has read in up to that point. Reported-by: Yang Lan <lanyang0908(a)gmail.com> Signed-off-by: Bob Peterson <rpeterso(a)redhat.com> Signed-off-by: Andreas Gruenbacher <agruenba(a)redhat.com> Signed-off-by: ZhaoLong Wang <wangzhaolong1(a)huawei.com> Conflicts: fs/gfs2/super.c --- fs/gfs2/super.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c index d14b98aa1c3e..9820aad4b19a 100644 --- a/fs/gfs2/super.c +++ b/fs/gfs2/super.c @@ -1412,6 +1412,14 @@ static void gfs2_evict_inode(struct inode *inode) if (inode->i_nlink || sb_rdonly(sb)) goto out; + /* + * In case of an incomplete mount, gfs2_evict_inode() may be called for + * system files without having an active journal to write to. In that + * case, skip the filesystem evict. + */ + if (!sdp->sd_jdesc) + goto out; + gfs2_holder_mark_uninitialized(&gh); ret = evict_should_delete(inode, &gh); if (ret == SHOULD_DEFER_EVICTION) -- 2.31.1

2 1

[PATCH openEuler-22.03-LTS] scsi: iscsi: iscsi_tcp: Fix null-ptr-deref while calling getpeername()
by Zhong Jinghua 14 Jun '23

14 Jun '23

From: Mike Christie <michael.christie(a)oracle.com> mainline inclusion from mainline-v6.1-rc1 commit 57569c37f0add1b6489e1a1563c71519daf732cf category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I6I8YD CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… ---------------------------------------- Fix a NULL pointer crash that occurs when we are freeing the socket at the same time we access it via sysfs. The problem is that: 1. iscsi_sw_tcp_conn_get_param() and iscsi_sw_tcp_host_get_param() take the frwd_lock and do sock_hold() then drop the frwd_lock. sock_hold() does a get on the "struct sock". 2. iscsi_sw_tcp_release_conn() does sockfd_put() which does the last put on the "struct socket" and that does __sock_release() which sets the sock->ops to NULL. 3. iscsi_sw_tcp_conn_get_param() and iscsi_sw_tcp_host_get_param() then call kernel_getpeername() which accesses the NULL sock->ops. Above we do a get on the "struct sock", but we needed a get on the "struct socket". Originally, we just held the frwd_lock the entire time but in commit bcf3a2953d36 ("scsi: iscsi: iscsi_tcp: Avoid holding spinlock while calling getpeername()") we switched to refcount based because the network layer changed and started taking a mutex in that path, so we could no longer hold the frwd_lock. Instead of trying to maintain multiple refcounts, this just has us use a mutex for accessing the socket in the interface code paths. Link: https://lore.kernel.org/r/20220907221700.10302-1-michael.christie@oracle.com Fixes: bcf3a2953d36 ("scsi: iscsi: iscsi_tcp: Avoid holding spinlock while calling getpeername()") Signed-off-by: Mike Christie <michael.christie(a)oracle.com> Signed-off-by: Martin K. Petersen <martin.petersen(a)oracle.com> Signed-off-by: Zhong Jinghua <zhongjinghua(a)huawei.com> --- drivers/scsi/iscsi_tcp.c | 73 ++++++++++++++++++++++++++++------------ drivers/scsi/iscsi_tcp.h | 2 ++ 2 files changed, 54 insertions(+), 21 deletions(-) diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c index 4575d0f0dd6c..e8b0ac0193ee 100644 --- a/drivers/scsi/iscsi_tcp.c +++ b/drivers/scsi/iscsi_tcp.c @@ -566,6 +566,8 @@ iscsi_sw_tcp_conn_create(struct iscsi_cls_session *cls_session, tcp_conn = conn->dd_data; tcp_sw_conn = tcp_conn->dd_data; + mutex_init(&tcp_sw_conn->sock_lock); + tfm = crypto_alloc_ahash("crc32c", 0, CRYPTO_ALG_ASYNC); if (IS_ERR(tfm)) goto free_conn; @@ -600,11 +602,15 @@ iscsi_sw_tcp_conn_create(struct iscsi_cls_session *cls_session, static void iscsi_sw_tcp_release_conn(struct iscsi_conn *conn) { - struct iscsi_session *session = conn->session; struct iscsi_tcp_conn *tcp_conn = conn->dd_data; struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; struct socket *sock = tcp_sw_conn->sock; + /* + * The iscsi transport class will make sure we are not called in + * parallel with start, stop, bind and destroys. However, this can be + * called twice if userspace does a stop then a destroy. + */ if (!sock) return; @@ -612,9 +618,9 @@ static void iscsi_sw_tcp_release_conn(struct iscsi_conn *conn) iscsi_sw_tcp_conn_restore_callbacks(conn); sock_put(sock->sk); - spin_lock_bh(&session->frwd_lock); + mutex_lock(&tcp_sw_conn->sock_lock); tcp_sw_conn->sock = NULL; - spin_unlock_bh(&session->frwd_lock); + mutex_unlock(&tcp_sw_conn->sock_lock); sockfd_put(sock); } @@ -666,7 +672,6 @@ iscsi_sw_tcp_conn_bind(struct iscsi_cls_session *cls_session, struct iscsi_cls_conn *cls_conn, uint64_t transport_eph, int is_leading) { - struct iscsi_session *session = cls_session->dd_data; struct iscsi_conn *conn = cls_conn->dd_data; struct iscsi_tcp_conn *tcp_conn = conn->dd_data; struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; @@ -686,10 +691,10 @@ iscsi_sw_tcp_conn_bind(struct iscsi_cls_session *cls_session, if (err) goto free_socket; - spin_lock_bh(&session->frwd_lock); + mutex_lock(&tcp_sw_conn->sock_lock); /* bind iSCSI connection and socket */ tcp_sw_conn->sock = sock; - spin_unlock_bh(&session->frwd_lock); + mutex_unlock(&tcp_sw_conn->sock_lock); /* setup Socket parameters */ sk = sock->sk; @@ -725,8 +730,15 @@ static int iscsi_sw_tcp_conn_set_param(struct iscsi_cls_conn *cls_conn, break; case ISCSI_PARAM_DATADGST_EN: iscsi_set_param(cls_conn, param, buf, buflen); + + mutex_lock(&tcp_sw_conn->sock_lock); + if (!tcp_sw_conn->sock) { + mutex_unlock(&tcp_sw_conn->sock_lock); + return -ENOTCONN; + } tcp_sw_conn->sendpage = conn->datadgst_en ? sock_no_sendpage : tcp_sw_conn->sock->ops->sendpage; + mutex_unlock(&tcp_sw_conn->sock_lock); break; case ISCSI_PARAM_MAX_R2T: return iscsi_tcp_set_max_r2t(conn, buf); @@ -741,8 +753,8 @@ static int iscsi_sw_tcp_conn_get_param(struct iscsi_cls_conn *cls_conn, enum iscsi_param param, char *buf) { struct iscsi_conn *conn = cls_conn->dd_data; - struct iscsi_tcp_conn *tcp_conn = conn->dd_data; - struct iscsi_sw_tcp_conn *tcp_sw_conn = tcp_conn->dd_data; + struct iscsi_sw_tcp_conn *tcp_sw_conn; + struct iscsi_tcp_conn *tcp_conn; struct sockaddr_in6 addr; struct socket *sock; int rc; @@ -752,21 +764,36 @@ static int iscsi_sw_tcp_conn_get_param(struct iscsi_cls_conn *cls_conn, case ISCSI_PARAM_CONN_ADDRESS: case ISCSI_PARAM_LOCAL_PORT: spin_lock_bh(&conn->session->frwd_lock); - if (!tcp_sw_conn || !tcp_sw_conn->sock) { + if (!conn->session->leadconn) { spin_unlock_bh(&conn->session->frwd_lock); return -ENOTCONN; } - sock = tcp_sw_conn->sock; - sock_hold(sock->sk); + /* + * The conn has been setup and bound, so just grab a ref + * incase a destroy runs while we are in the net layer. + */ + iscsi_get_conn(conn->cls_conn); spin_unlock_bh(&conn->session->frwd_lock); + tcp_conn = conn->dd_data; + tcp_sw_conn = tcp_conn->dd_data; + + mutex_lock(&tcp_sw_conn->sock_lock); + sock = tcp_sw_conn->sock; + if (!sock) { + rc = -ENOTCONN; + goto sock_unlock; + } + if (param == ISCSI_PARAM_LOCAL_PORT) rc = kernel_getsockname(sock, (struct sockaddr *)&addr); else rc = kernel_getpeername(sock, (struct sockaddr *)&addr); - sock_put(sock->sk); +sock_unlock: + mutex_unlock(&tcp_sw_conn->sock_lock); + iscsi_put_conn(conn->cls_conn); if (rc < 0) return rc; @@ -805,17 +832,21 @@ static int iscsi_sw_tcp_host_get_param(struct Scsi_Host *shost, } tcp_conn = conn->dd_data; tcp_sw_conn = tcp_conn->dd_data; - sock = tcp_sw_conn->sock; - if (!sock) { - spin_unlock_bh(&session->frwd_lock); - return -ENOTCONN; - } - sock_hold(sock->sk); + /* + * The conn has been setup and bound, so just grab a ref + * incase a destroy runs while we are in the net layer. + */ + iscsi_get_conn(conn->cls_conn); spin_unlock_bh(&session->frwd_lock); - rc = kernel_getsockname(sock, - (struct sockaddr *)&addr); - sock_put(sock->sk); + mutex_lock(&tcp_sw_conn->sock_lock); + sock = tcp_sw_conn->sock; + if (!sock) + rc = -ENOTCONN; + else + rc = kernel_getsockname(sock, (struct sockaddr *)&addr); + mutex_unlock(&tcp_sw_conn->sock_lock); + iscsi_put_conn(conn->cls_conn); if (rc < 0) return rc; diff --git a/drivers/scsi/iscsi_tcp.h b/drivers/scsi/iscsi_tcp.h index 791453195099..1731956326e2 100644 --- a/drivers/scsi/iscsi_tcp.h +++ b/drivers/scsi/iscsi_tcp.h @@ -28,6 +28,8 @@ struct iscsi_sw_tcp_send { struct iscsi_sw_tcp_conn { struct socket *sock; + /* Taken when accessing the sock from the netlink/sysfs interface */ + struct mutex sock_lock; struct iscsi_sw_tcp_send out; /* old values for socket callbacks */ -- 2.31.1

2 1

[PATCH OLK-5.10] sched: Add static key for qos sched to improve performance
by Hui Tang 14 Jun '23

14 Jun '23

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7D76D -------------------------------- Add cmdline of 'noqossched' which is enable by default. Use the static key to reduce noise for multi level prio, smt expell and prio load balance. Signed-off-by: Hui Tang <tanghui20(a)huawei.com> --- include/linux/sched.h | 26 ++++++++++++++--- kernel/sched/core.c | 11 ++++++++ kernel/sched/fair.c | 66 ++++++++++++++++++++++++++++--------------- kernel/sched/sched.h | 6 +++- kernel/signal.c | 3 +- 5 files changed, 84 insertions(+), 28 deletions(-) diff --git a/include/linux/sched.h b/include/linux/sched.h index 3aae225f98a7..fdd3324cc858 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1869,15 +1869,19 @@ extern char *__get_task_comm(char *to, size_t len, struct task_struct *tsk); __get_task_comm(buf, sizeof(buf), tsk); \ }) +#ifdef CONFIG_SMP #ifdef CONFIG_QOS_SCHED_SMT_EXPELLER -void qos_smt_check_need_resched(void); +static __always_inline bool qos_sched_enabled(void); +extern struct static_key_true qos_smt_expell_switch; +extern void qos_smt_check_need_resched(void); #endif - -#ifdef CONFIG_SMP static __always_inline void scheduler_ipi(void) { #ifdef CONFIG_QOS_SCHED_SMT_EXPELLER - qos_smt_check_need_resched(); + + if (qos_sched_enabled() && + static_branch_likely(&qos_smt_expell_switch)) + qos_smt_check_need_resched(); #endif /* * Fold TIF_NEED_RESCHED into the preempt_count; anybody setting @@ -2215,11 +2219,25 @@ static inline void sched_core_fork(struct task_struct *p) { } void sched_move_offline_task(struct task_struct *p); void sched_qos_offline_wait(void); int sched_qos_cpu_overload(void); + +extern struct static_key_true __qos_sched_switch; +static __always_inline bool qos_sched_enabled(void) +{ + if (static_branch_likely(&__qos_sched_switch)) + return true; + + return false; +} #else static inline int sched_qos_cpu_overload(void) { return 0; } + +static __always_inline bool qos_sched_enabled(void) +{ + return false; +} #endif #ifdef CONFIG_QOS_SCHED_DYNAMIC_AFFINITY diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 454bca0c9c6b..71c69c8161ff 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3617,6 +3617,17 @@ static void __init init_schedstats(void) set_schedstats(__sched_schedstats); } +#ifdef CONFIG_QOS_SCHED +DEFINE_STATIC_KEY_TRUE(__qos_sched_switch); + +static int __init no_qos_sched_switch_setup(char *__unused) +{ + static_branch_disable(&__qos_sched_switch); + return 1; +} +__setup("noqossched", no_qos_sched_switch_setup); +#endif + #ifdef CONFIG_PROC_SYSCTL int sysctl_schedstats(struct ctl_table *table, int write, void *buffer, size_t *lenp, loff_t *ppos) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index ff209d25c21c..003ebd244d31 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -2997,14 +2997,15 @@ static inline void update_scan_period(struct task_struct *p, int new_cpu) #endif /* CONFIG_NUMA_BALANCING */ #ifdef CONFIG_QOS_SCHED_PRIO_LB -static void +static __always_inline void adjust_rq_cfs_tasks(void (*list_op)(struct list_head *, struct list_head *), struct rq *rq, struct sched_entity *se) { struct task_group *tg = task_group(task_of(se)); - if (sysctl_sched_prio_load_balance_enabled && is_offline_level(tg->qos_level)) + if (qos_sched_enabled() && sysctl_sched_prio_load_balance_enabled && + is_offline_level(tg->qos_level)) (*list_op)(&se->group_node, &rq->cfs_offline_tasks); else (*list_op)(&se->group_node, &rq->cfs_tasks); @@ -3235,7 +3236,8 @@ static long calc_group_shares(struct cfs_rq *cfs_rq) tg_shares = READ_ONCE(tg->shares); #ifdef CONFIG_QOS_SCHED_MULTILEVEL - tg_shares = qos_reweight(tg_shares, tg); + if (qos_sched_enabled()) + tg_shares = qos_reweight(tg_shares, tg); #endif load = max(scale_load_down(cfs_rq->load.weight), cfs_rq->avg.load_avg); @@ -3286,7 +3288,8 @@ static void update_cfs_group(struct sched_entity *se) #ifndef CONFIG_SMP shares = READ_ONCE(gcfs_rq->tg->shares); #ifdef CONFIG_QOS_SCHED_MULTILEVEL - shares = qos_reweight(shares, gcfs_rq->tg); + if (qos_sched_enabled()) + shares = qos_reweight(shares, gcfs_rq->tg); #endif if (likely(se->load.weight == shares)) @@ -7071,7 +7074,7 @@ static int find_energy_efficient_cpu(struct task_struct *p, int prev_cpu) #ifdef CONFIG_JUMP_LABEL static DEFINE_STATIC_KEY_FALSE(__dynamic_affinity_used); -static inline bool dynamic_affinity_used(void) +static __always_inline bool dynamic_affinity_used(void) { return static_branch_unlikely(&__dynamic_affinity_used); } @@ -7082,7 +7085,7 @@ void dynamic_affinity_enable(void) } #else /* CONFIG_JUMP_LABEL */ -static bool dynamic_affinity_used(void) +static __always_inline bool dynamic_affinity_used(void) { return true; } @@ -7097,9 +7100,6 @@ int sysctl_sched_util_low_pct = 85; static inline bool prefer_cpus_valid(struct task_struct *p) { - if (!dynamic_affinity_used()) - return false; - return p->prefer_cpus && !cpumask_empty(p->prefer_cpus) && !cpumask_equal(p->prefer_cpus, p->cpus_ptr) && @@ -7208,7 +7208,9 @@ select_task_rq_fair(struct task_struct *p, int prev_cpu, int sd_flag, int wake_f lockdep_assert_held(&p->pi_lock); #ifdef CONFIG_QOS_SCHED_DYNAMIC_AFFINITY - set_task_select_cpus(p, &idlest_cpu, sd_flag); + p->select_cpus = p->cpus_ptr; + if (dynamic_affinity_used()) + set_task_select_cpus(p, &idlest_cpu, sd_flag); #endif if (sd_flag & SD_BALANCE_WAKE) { @@ -7770,9 +7772,13 @@ static int __unthrottle_qos_cfs_rqs(int cpu) return res; } -static int unthrottle_qos_cfs_rqs(int cpu) +static __always_inline int unthrottle_qos_cfs_rqs(int cpu) { int res; + + if (!qos_sched_enabled()) + return 0; + res = __unthrottle_qos_cfs_rqs(cpu); if (qos_timer_is_activated(cpu) && !qos_smt_expelled(cpu)) @@ -7781,8 +7787,11 @@ static int unthrottle_qos_cfs_rqs(int cpu) return res; } -static bool check_qos_cfs_rq(struct cfs_rq *cfs_rq) +static __always_inline bool check_qos_cfs_rq(struct cfs_rq *cfs_rq) { + if (!qos_sched_enabled()) + return false; + if (unlikely(__this_cpu_read(qos_cpu_overload))) { return false; } @@ -7864,8 +7873,11 @@ void init_qos_hrtimer(int cpu) * we should schedule offline tasks to run so that they can leave kernel * critical sections, and throttle them before returning to user mode. */ -static void qos_schedule_throttle(struct task_struct *p) +static __always_inline void qos_schedule_throttle(struct task_struct *p) { + if (!qos_sched_enabled()) + return; + if (unlikely(current->flags & PF_KTHREAD)) return; @@ -7876,7 +7888,7 @@ static void qos_schedule_throttle(struct task_struct *p) } #ifndef CONFIG_QOS_SCHED_SMT_EXPELLER -static bool qos_smt_expelled(int this_cpu) +static __always_inline bool qos_smt_expelled(int this_cpu) { return false; } @@ -7952,8 +7964,11 @@ static bool qos_sched_idle_cpu(int this_cpu) rq->nr_running); } -static bool qos_smt_expelled(int this_cpu) +static __always_inline bool qos_smt_expelled(int this_cpu) { + if (!qos_sched_enabled()) + return false; + if (!static_branch_likely(&qos_smt_expell_switch)) return false; @@ -8011,8 +8026,11 @@ static void qos_smt_send_ipi(int this_cpu) } } -static void qos_smt_expel(int this_cpu, struct task_struct *p) +static __always_inline void qos_smt_expel(int this_cpu, struct task_struct *p) { + if (!qos_sched_enabled()) + return; + if (!static_branch_likely(&qos_smt_expell_switch)) return; @@ -8035,7 +8053,7 @@ static bool _qos_smt_check_need_resched(int this_cpu, struct rq *rq) { int cpu; - if (!qos_smt_enabled()) + if (!qos_sched_enabled() || !qos_smt_enabled()) return false; for_each_cpu(cpu, cpu_smt_mask(this_cpu)) { @@ -8145,7 +8163,8 @@ pick_next_task_fair(struct rq *rq, struct task_struct *prev, struct rq_flags *rf #ifdef CONFIG_FAIR_GROUP_SCHED if (!prev || prev->sched_class != &fair_sched_class) { #ifdef CONFIG_QOS_SCHED - if (cfs_rq->idle_h_nr_running != 0 && rq->online) + if (qos_sched_enabled() && + cfs_rq->idle_h_nr_running != 0 && rq->online) goto qos_simple; else #endif @@ -8661,7 +8680,7 @@ static int task_hot(struct task_struct *p, struct lb_env *env) #ifdef CONFIG_QOS_SCHED_PRIO_LB /* Preempt sched idle cpu do not consider migration cost */ - if (sysctl_sched_prio_load_balance_enabled && + if (qos_sched_enabled() && sysctl_sched_prio_load_balance_enabled && cpus_share_cache(env->src_cpu, env->dst_cpu) && sched_idle_cpu(env->dst_cpu)) return 0; @@ -8770,7 +8789,9 @@ int can_migrate_task(struct task_struct *p, struct lb_env *env) return 0; #ifdef CONFIG_QOS_SCHED_DYNAMIC_AFFINITY - set_task_select_cpus(p, NULL, 0); + p->select_cpus = p->cpus_ptr; + if (dynamic_affinity_used()) + set_task_select_cpus(p, NULL, 0); if (!cpumask_test_cpu(env->dst_cpu, p->select_cpus)) { #else if (!cpumask_test_cpu(env->dst_cpu, p->cpus_ptr)) { @@ -8916,7 +8937,7 @@ static struct task_struct *detach_one_task(struct lb_env *env) return p; } #ifdef CONFIG_QOS_SCHED_PRIO_LB - if (sysctl_sched_prio_load_balance_enabled) { + if (qos_sched_enabled() && sysctl_sched_prio_load_balance_enabled) { loop++; if (loop == 1) { tasks = &env->src_rq->cfs_offline_tasks; @@ -9055,7 +9076,8 @@ static int detach_tasks(struct lb_env *env) } #ifdef CONFIG_QOS_SCHED_PRIO_LB - if (sysctl_sched_prio_load_balance_enabled && env->imbalance > 0) { + if (qos_sched_enabled() && sysctl_sched_prio_load_balance_enabled && + env->imbalance > 0) { /* * Avoid offline tasks starve to death if env->loop exceed * env->loop_max, so we should set env->loop to 0 and detach diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 27fd1240ac85..95ae9ac553fc 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -3065,8 +3065,12 @@ static inline int is_offline_level(long qos_level) #endif #ifdef CONFIG_QOS_SCHED_SMT_EXPELLER -static inline int task_has_qos_idle_policy(struct task_struct *p) +static __always_inline int task_has_qos_idle_policy(struct task_struct *p) { + if (!qos_sched_enabled() || + !static_branch_likely(&qos_smt_expell_switch)) + return 0; + return qos_idle_policy(task_group(p)->qos_level) && p->policy == SCHED_IDLE; } #endif diff --git a/kernel/signal.c b/kernel/signal.c index cf498d949f2f..dd6076c6235f 100644 --- a/kernel/signal.c +++ b/kernel/signal.c @@ -1050,7 +1050,8 @@ static void complete_signal(int sig, struct task_struct *p, enum pid_type type) t = p; do { #ifdef CONFIG_QOS_SCHED - sched_move_offline_task(t); + if (qos_sched_enabled()) + sched_move_offline_task(t); #endif task_clear_jobctl_pending(t, JOBCTL_PENDING_MASK); sigaddset(&t->pending.signal, SIGKILL); -- 2.17.1

2 1

[PATCH v2 OLK-5.10] arm64: entry: fix ABBA deadlock when el1_dbg preempts rq->lock context
by Yu Liao 14 Jun '23

14 Jun '23

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7DAV3 CVE: NA -------------------------------- When arm64 enters el1_dbg, it will hold rcu_node lock. If rq_lock critical section is preempted by el1_dbg, it may cause an ABBA deadlock. The scenario is as follows: CPU0 CPU1 ---- ---- process context rcu_gp_fqs() lock(&rq->lock); lock(rcu_node_0); lock(&rq->lock); //el1_dbg() lock(rcu_node_0); rcu_nmi_enter() do not hold rcu_node in the nmi context, so fix this issue by keeping the same logical for el1_dbg without marking el1_dbg as nmi. Fixes: d8bb6718c4db ("arm64: Make debug exception handlers visible from RCU") Signed-off-by: Yu Liao <liaoyu15(a)huawei.com> --- arch/arm64/kernel/entry-common.c | 8 ++++++++ include/linux/preempt.h | 2 ++ kernel/panic.c | 5 +++++ kernel/rcu/tree.c | 2 +- 4 files changed, 16 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kernel/entry-common.c b/arch/arm64/kernel/entry-common.c index 387c755b79f6..b8a527ac6781 100644 --- a/arch/arm64/kernel/entry-common.c +++ b/arch/arm64/kernel/entry-common.c @@ -17,6 +17,7 @@ #include <asm/mmu.h> #include <asm/sysreg.h> +static DEFINE_PER_CPU(int, dbg_count); /* * This is intended to match the logic in irqentry_enter(), handling the kernel * mode transitions only. @@ -150,10 +151,16 @@ static void noinstr el1_inv(struct pt_regs *regs, unsigned long esr) exit_to_kernel_mode(regs); } +int in_dbg(void) +{ + return this_cpu_read(dbg_count) > 0; +} + static void noinstr arm64_enter_el1_dbg(struct pt_regs *regs) { regs->lockdep_hardirqs = lockdep_hardirqs_enabled(); + this_cpu_inc(dbg_count); lockdep_hardirqs_off(CALLER_ADDR0); rcu_nmi_enter(); @@ -172,6 +179,7 @@ static void noinstr arm64_exit_el1_dbg(struct pt_regs *regs) rcu_nmi_exit(); if (restore) lockdep_hardirqs_on(CALLER_ADDR0); + this_cpu_dec(dbg_count); } static void noinstr el1_dbg(struct pt_regs *regs, unsigned long esr) diff --git a/include/linux/preempt.h b/include/linux/preempt.h index 7d9c1c0e149c..89d5281e060a 100644 --- a/include/linux/preempt.h +++ b/include/linux/preempt.h @@ -352,4 +352,6 @@ static __always_inline void migrate_enable(void) preempt_enable(); } +int in_dbg(void); + #endif /* __LINUX_PREEMPT_H */ diff --git a/kernel/panic.c b/kernel/panic.c index d991c3b1b559..9dadd3c5df57 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -761,3 +761,8 @@ static int __init panic_on_taint_setup(char *s) return 0; } early_param("panic_on_taint", panic_on_taint_setup); + +int __weak in_dbg(void) +{ + return 0; +} diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 0142855482f8..18b9c74474ec 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -957,7 +957,7 @@ void __rcu_irq_enter_check_tick(void) struct rcu_data *rdp = this_cpu_ptr(&rcu_data); // If we're here from NMI there's nothing to do. - if (in_nmi()) + if (in_nmi() || in_dbg()) return; RCU_LOCKDEP_WARN(rcu_dynticks_curr_cpu_in_eqs(), -- 2.25.1

2 1

[OLK-5.10 PATCH] arm64: entry: fix ABBA deadlock when el1_dbg preempts rq->lock context
by Yu Liao 14 Jun '23

14 Jun '23

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I7DAV3 CVE: NA -------------------------------- When arm64 enters el1_dbg, it will hold rcu_node lock. If rq_lock critical section is preempted by el1_dbg, it may cause an ABBA deadlock. The scenario is as follows: CPU0 CPU1 ---- ---- process context rcu_gp_fqs() lock(&rq->lock); lock(rcu_node_0); lock(&rq->lock); //el1_dbg() lock(rcu_node_0); rcu_nmi_enter() do not hold rcu_node in the nmi context, so fix this issue by keeping the same logical for el1_dbg without marking el1_dbg as nmi. Fixes: d8bb6718c4db ("arm64: Make debug exception handlers visible from RCU") Signed-off-by: Yu Liao <liaoyu15(a)huawei.com> --- arch/arm64/kernel/entry-common.c | 8 ++++++++ include/linux/preempt.h | 2 ++ kernel/panic.c | 5 +++++ kernel/rcu/tree.c | 2 +- 4 files changed, 16 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kernel/entry-common.c b/arch/arm64/kernel/entry-common.c index 387c755b79f6..b8a527ac6781 100644 --- a/arch/arm64/kernel/entry-common.c +++ b/arch/arm64/kernel/entry-common.c @@ -17,6 +17,7 @@ #include <asm/mmu.h> #include <asm/sysreg.h> +static DEFINE_PER_CPU(int, dbg_count); /* * This is intended to match the logic in irqentry_enter(), handling the kernel * mode transitions only. @@ -150,10 +151,16 @@ static void noinstr el1_inv(struct pt_regs *regs, unsigned long esr) exit_to_kernel_mode(regs); } +int in_dbg(void) +{ + return this_cpu_read(dbg_count) > 0; +} + static void noinstr arm64_enter_el1_dbg(struct pt_regs *regs) { regs->lockdep_hardirqs = lockdep_hardirqs_enabled(); + this_cpu_inc(dbg_count); lockdep_hardirqs_off(CALLER_ADDR0); rcu_nmi_enter(); @@ -172,6 +179,7 @@ static void noinstr arm64_exit_el1_dbg(struct pt_regs *regs) rcu_nmi_exit(); if (restore) lockdep_hardirqs_on(CALLER_ADDR0); + this_cpu_dec(dbg_count); } static void noinstr el1_dbg(struct pt_regs *regs, unsigned long esr) diff --git a/include/linux/preempt.h b/include/linux/preempt.h index 7d9c1c0e149c..89d5281e060a 100644 --- a/include/linux/preempt.h +++ b/include/linux/preempt.h @@ -352,4 +352,6 @@ static __always_inline void migrate_enable(void) preempt_enable(); } +int in_dbg(void); + #endif /* __LINUX_PREEMPT_H */ diff --git a/kernel/panic.c b/kernel/panic.c index d991c3b1b559..9dadd3c5df57 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -761,3 +761,8 @@ static int __init panic_on_taint_setup(char *s) return 0; } early_param("panic_on_taint", panic_on_taint_setup); + +int __weak in_dbg(void) +{ + return 0; +} diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 0142855482f8..18b9c74474ec 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -957,7 +957,7 @@ void __rcu_irq_enter_check_tick(void) struct rcu_data *rdp = this_cpu_ptr(&rcu_data); // If we're here from NMI there's nothing to do. - if (in_nmi()) + if (in_nmi() || in_dbg()) return; RCU_LOCKDEP_WARN(rcu_dynticks_curr_cpu_in_eqs(), -- 2.25.1

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openEuler Kernel SIG双周例会
by openEuler conference 14 Jun '23

14 Jun '23

您好！ Kernel SIG 邀请您参加 2023-06-16 14:00 召开的Zoom会议(自动录制) 会议主题：openEuler Kernel SIG双周例会会议内容： 1. 进展update 2. 议题征集中欢迎大家积极申报议题（新增议题可以直接回复邮件，或录入会议看板）会议链接：https://us06web.zoom.us/j/88482572951?pwd=dXV5bFh4Nyt2Z1VpN0NOL3hGSWVHUT09 会议纪要：https://etherpad.openeuler.org/p/Kernel-meetings 温馨提醒：建议接入会议后修改参会人的姓名，也可以使用您在gitee.com的ID 更多资讯尽在：https://openeuler.org/zh/ Hello! openEuler Kernel SIG invites you to attend the Zoom conference(auto recording) will be held at 2023-06-16 14:00, The subject of the conference is openEuler Kernel SIG双周例会, Summary: 1. 进展update 2. 议题征集中欢迎大家积极申报议题（新增议题可以直接回复邮件，或录入会议看板） You can join the meeting at https://us06web.zoom.us/j/88482572951?pwd=dXV5bFh4Nyt2Z1VpN0NOL3hGSWVHUT09. Add topics at https://etherpad.openeuler.org/p/Kernel-meetings. Note: You are advised to change the participant name after joining the conference or use your ID at gitee.com. More information: https://openeuler.org/en/

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[PATCH openEuler-22.03-LTS-SP2 v4 0/2] add one bpf helper function for redissockmap
by Liu Jian 13 Jun '23

13 Jun '23

add one bpf helper function for redissockmap Liu Jian (2): net: add bpf_is_local_ipaddr bpf helper function net: let sockops can use bpf_get_current_comm() arch/arm64/configs/openeuler_defconfig | 1 + arch/x86/configs/openeuler_defconfig | 1 + drivers/net/Kconfig | 8 ++ drivers/net/Makefile | 1 + drivers/net/localip/Makefile | 8 ++ drivers/net/localip/localip.c | 157 +++++++++++++++++++++++++ include/trace/events/net.h | 4 + include/uapi/linux/bpf.h | 7 ++ net/core/filter.c | 20 ++++ net/core/net-traces.c | 1 + tools/include/uapi/linux/bpf.h | 7 ++ 11 files changed, 215 insertions(+) create mode 100644 drivers/net/localip/Makefile create mode 100644 drivers/net/localip/localip.c -- 2.34.1

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[PATCH openEuler-22.03-LTS-SP2 v3 0/2] add two bpf helper function for redissockmap
by Liu Jian 13 Jun '23

13 Jun '23

v2->v3: change function pointer to tracepoint. add two bpf helper function for redissockmap Liu Jian (2): net: add bpf_is_local_ipaddr bpf helper function net: let sockops can use bpf_get_current_comm() arch/arm64/configs/openeuler_defconfig | 1 + arch/x86/configs/openeuler_defconfig | 1 + drivers/net/Kconfig | 8 ++ drivers/net/Makefile | 1 + drivers/net/localip/Makefile | 8 ++ drivers/net/localip/localip.c | 157 +++++++++++++++++++++++++ include/trace/events/net.h | 17 +++ include/uapi/linux/bpf.h | 7 ++ net/core/filter.c | 21 ++++ tools/include/uapi/linux/bpf.h | 7 ++ 10 files changed, 228 insertions(+) create mode 100644 drivers/net/localip/Makefile create mode 100644 drivers/net/localip/localip.c -- 2.34.1

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[PATCH openEuler-22.03-LTS-SP2 v6 0/2] Add vhost net polling for high frequency TX mode
by Xu Kuohai 13 Jun '23

13 Jun '23

During high-frequency packet transmission, if vhost immediately notifies virtio driver after reading the virtio_queue empty, virtio driver will perform a kick after sending the next packet. However, if vhost waits a little longer, it could get the next packet sent by virtio driver without the need for virtio to perform a kick. This patch optimizes for this issue. If the TX interval recently recorded by vhost-net is within 50us, it is considered a high-frequency packet sending. At this time, after detecting the virtio_queue is empty, vhost-net will wait for new packets to arrive before notifing the virtio driver. Xu Kuohai (2): vhost_net: Suppress kick ratio when high frequency TX detected openeuler: vhost_net: Enable vhost net polling for openeuler arm64 and x86 arch/arm64/configs/openeuler_defconfig | 2 + arch/x86/configs/openeuler_defconfig | 2 + drivers/vhost/Kconfig | 22 +++++++++ drivers/vhost/net.c | 66 ++++++++++++++++++++++++++ 4 files changed, 92 insertions(+) -- 2.30.2

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