March 2025 - Kernel - mailweb.openeuler.org

[PATCH OLK-5.10 V1] sched/fair: Optimize the dynamic smt
by Cheng Yu 28 Mar '25

28 Mar '25

hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/IBWWUI CVE: NA -------------------------------- The optimizations are as follows: 1. A more reasonable algorithm for obtaining load values; 2. Limit the maximum value of sysctl_sched_util_ratio to 100; 3. If the value of sysctl_sched_util_ratio is 100, the other smt of the core will not be used. Signed-off-by: Cheng Yu <serein.chengyu(a)huawei.com> --- arch/arm64/Kconfig | 1 + arch/x86/configs/openeuler_defconfig | 1 - init/Kconfig | 7 +++++++ kernel/sched/fair.c | 7 +++++-- kernel/sysctl.c | 1 + 5 files changed, 14 insertions(+), 3 deletions(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 2591707024d4..93ced97f8c6c 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -78,6 +78,7 @@ config ARM64 select ARCH_SUPPORTS_ATOMIC_RMW select ARCH_SUPPORTS_INT128 if CC_HAS_INT128 && (GCC_VERSION >= 50000 || CC_IS_CLANG) select ARCH_SUPPORTS_NUMA_BALANCING + select ARCH_SUPPORTS_SCHED_KEEP_ON_CORE select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH select ARCH_WANT_COMPAT_IPC_PARSE_VERSION if COMPAT select ARCH_WANT_DEFAULT_BPF_JIT diff --git a/arch/x86/configs/openeuler_defconfig b/arch/x86/configs/openeuler_defconfig index 20bd8ac25791..e008e119e7a4 100644 --- a/arch/x86/configs/openeuler_defconfig +++ b/arch/x86/configs/openeuler_defconfig @@ -194,7 +194,6 @@ CONFIG_USER_NS=y CONFIG_PID_NS=y CONFIG_NET_NS=y CONFIG_SCHED_STEAL=y -# CONFIG_SCHED_KEEP_ON_CORE is not set CONFIG_CHECKPOINT_RESTORE=y CONFIG_SCHED_AUTOGROUP=y # CONFIG_SYSFS_DEPRECATED is not set diff --git a/init/Kconfig b/init/Kconfig index be284bca406c..3a6a14e66acd 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1370,8 +1370,15 @@ config SCHED_STEAL If unsure, say N here. +# +# For architectures that want to enable the support for SCHED_KEEP_ON_CORE +# +config ARCH_SUPPORTS_SCHED_KEEP_ON_CORE + bool + config SCHED_KEEP_ON_CORE bool "Prefer physical cores when migrating tasks" + depends on ARCH_SUPPORTS_SCHED_KEEP_ON_CORE depends on SCHED_SMT default n help diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index a518d636f07f..5fc8d6a25b9a 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -7330,13 +7330,16 @@ static int select_idle_core(struct task_struct *p, int core, struct cpumask *cpu #ifdef CONFIG_SCHED_KEEP_ON_CORE int sysctl_sched_util_ratio = 100; -static int core_has_spare(int cpu) +static bool core_has_spare(int cpu) { int core_id = cpumask_first(cpu_smt_mask(cpu)); struct rq *rq = cpu_rq(core_id); - unsigned long util = rq->cfs.avg.util_avg; + unsigned long util = cpu_util(cpu); unsigned long capacity = rq->cpu_capacity; + if (sysctl_sched_util_ratio == 100) + return true; + return util * 100 < capacity * sysctl_sched_util_ratio; } #endif diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 0d4d83da4b30..b4b36f8a3149 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -2828,6 +2828,7 @@ static struct ctl_table kern_table[] = { .mode = 0644, .proc_handler = proc_dointvec_minmax, .extra1 = SYSCTL_ZERO, + .extra2 = &one_hundred, }, #endif #ifdef CONFIG_SCHED_STEAL -- 2.25.1

2 1

[PATCH OLK-5.10] arm64: cacheinfo: Avoid out-of-bounds write to cacheinfo array
by Wupeng Ma 28 Mar '25

28 Mar '25

From: Radu Rendec <rrendec(a)redhat.com> stable inclusion from stable-v5.10.235 commit e4fde33107351ec33f1a64188612fbc6ca659284 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IBPC4K CVE: CVE-2025-21785 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 875d742cf5327c93cba1f11e12b08d3cce7a88d2 ] The loop that detects/populates cache information already has a bounds check on the array size but does not account for cache levels with separate data/instructions cache. Fix this by incrementing the index for any populated leaf (instead of any populated level). Fixes: 5d425c186537 ("arm64: kernel: add support for cpu cache information") Signed-off-by: Radu Rendec <rrendec(a)redhat.com> Link: https://lore.kernel.org/r/20250206174420.2178724-1-rrendec@redhat.com Signed-off-by: Will Deacon <will(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Wupeng Ma <mawupeng1(a)huawei.com> --- arch/arm64/kernel/cacheinfo.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/arch/arm64/kernel/cacheinfo.c b/arch/arm64/kernel/cacheinfo.c index 97c42be71338..1510f457b615 100644 --- a/arch/arm64/kernel/cacheinfo.c +++ b/arch/arm64/kernel/cacheinfo.c @@ -87,16 +87,18 @@ int populate_cache_leaves(unsigned int cpu) unsigned int level, idx; enum cache_type type; struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); - struct cacheinfo *this_leaf = this_cpu_ci->info_list; + struct cacheinfo *infos = this_cpu_ci->info_list; for (idx = 0, level = 1; level <= this_cpu_ci->num_levels && - idx < this_cpu_ci->num_leaves; idx++, level++) { + idx < this_cpu_ci->num_leaves; level++) { type = get_cache_type(level); if (type == CACHE_TYPE_SEPARATE) { - ci_leaf_init(this_leaf++, CACHE_TYPE_DATA, level); - ci_leaf_init(this_leaf++, CACHE_TYPE_INST, level); + if (idx + 1 >= this_cpu_ci->num_leaves) + break; + ci_leaf_init(&infos[idx++], CACHE_TYPE_DATA, level); + ci_leaf_init(&infos[idx++], CACHE_TYPE_INST, level); } else { - ci_leaf_init(this_leaf++, type, level); + ci_leaf_init(&infos[idx++], type, level); } } return 0; -- 2.43.0

2 1

[PATCH openEuler-1.0-LTS] arm64: cacheinfo: Avoid out-of-bounds write to cacheinfo array
by Wupeng Ma 28 Mar '25

28 Mar '25

From: Radu Rendec <rrendec(a)redhat.com> stable inclusion from stable-v5.10.235 commit e4fde33107351ec33f1a64188612fbc6ca659284 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBPC4K CVE: CVE-2025-21785 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 875d742cf5327c93cba1f11e12b08d3cce7a88d2 ] The loop that detects/populates cache information already has a bounds check on the array size but does not account for cache levels with separate data/instructions cache. Fix this by incrementing the index for any populated leaf (instead of any populated level). Fixes: 5d425c186537 ("arm64: kernel: add support for cpu cache information") Signed-off-by: Radu Rendec <rrendec(a)redhat.com> Link: https://lore.kernel.org/r/20250206174420.2178724-1-rrendec@redhat.com Signed-off-by: Will Deacon <will(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Wupeng Ma <mawupeng1(a)huawei.com> --- arch/arm64/kernel/cacheinfo.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/arch/arm64/kernel/cacheinfo.c b/arch/arm64/kernel/cacheinfo.c index 0c0cd4d26b87..80a4ab1c43fd 100644 --- a/arch/arm64/kernel/cacheinfo.c +++ b/arch/arm64/kernel/cacheinfo.c @@ -96,16 +96,18 @@ static int __populate_cache_leaves(unsigned int cpu) unsigned int level, idx; enum cache_type type; struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); - struct cacheinfo *this_leaf = this_cpu_ci->info_list; + struct cacheinfo *infos = this_cpu_ci->info_list; for (idx = 0, level = 1; level <= this_cpu_ci->num_levels && - idx < this_cpu_ci->num_leaves; idx++, level++) { + idx < this_cpu_ci->num_leaves; level++) { type = get_cache_type(level); if (type == CACHE_TYPE_SEPARATE) { - ci_leaf_init(this_leaf++, CACHE_TYPE_DATA, level); - ci_leaf_init(this_leaf++, CACHE_TYPE_INST, level); + if (idx + 1 >= this_cpu_ci->num_leaves) + break; + ci_leaf_init(&infos[idx++], CACHE_TYPE_DATA, level); + ci_leaf_init(&infos[idx++], CACHE_TYPE_INST, level); } else { - ci_leaf_init(this_leaf++, type, level); + ci_leaf_init(&infos[idx++], type, level); } } return 0; -- 2.43.0

2 1

[PATCH openEuler-1.0-LTS] PM / devfreq: rk3399_dmc: Disable edev on remove()
by Wupeng Ma 28 Mar '25

28 Mar '25

From: Brian Norris <briannorris(a)chromium.org> stable inclusion from stable-v4.19.247 commit 664736e2cc09e504ce58ec61164d029d1f2651bb category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBP6Y5 CVE: CVE-2022-49460 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 2fccf9e6050e0e3b8b4cd275d41daf7f7fa22804 ] Otherwise we hit an unablanced enable-count when unbinding the DFI device: [ 1279.659119] ------------[ cut here ]------------ [ 1279.659179] WARNING: CPU: 2 PID: 5638 at drivers/devfreq/devfreq-event.c:360 devfreq_event_remove_edev+0x84/0x8c ... [ 1279.659352] Hardware name: Google Kevin (DT) [ 1279.659363] pstate: 80400005 (Nzcv daif +PAN -UAO -TCO BTYPE=--) [ 1279.659371] pc : devfreq_event_remove_edev+0x84/0x8c [ 1279.659380] lr : devm_devfreq_event_release+0x1c/0x28 ... [ 1279.659571] Call trace: [ 1279.659582] devfreq_event_remove_edev+0x84/0x8c [ 1279.659590] devm_devfreq_event_release+0x1c/0x28 [ 1279.659602] release_nodes+0x1cc/0x244 [ 1279.659611] devres_release_all+0x44/0x60 [ 1279.659621] device_release_driver_internal+0x11c/0x1ac [ 1279.659629] device_driver_detach+0x20/0x2c [ 1279.659641] unbind_store+0x7c/0xb0 [ 1279.659650] drv_attr_store+0x2c/0x40 [ 1279.659663] sysfs_kf_write+0x44/0x58 [ 1279.659672] kernfs_fop_write_iter+0xf4/0x190 [ 1279.659684] vfs_write+0x2b0/0x2e4 [ 1279.659693] ksys_write+0x80/0xec [ 1279.659701] __arm64_sys_write+0x24/0x30 [ 1279.659714] el0_svc_common+0xf0/0x1d8 [ 1279.659724] do_el0_svc_compat+0x28/0x3c [ 1279.659738] el0_svc_compat+0x10/0x1c [ 1279.659746] el0_sync_compat_handler+0xa8/0xcc [ 1279.659758] el0_sync_compat+0x188/0x1c0 [ 1279.659768] ---[ end trace cec200e5094155b4 ]--- Signed-off-by: Brian Norris <briannorris(a)chromium.org> Signed-off-by: Chanwoo Choi <cw00.choi(a)samsung.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Wupeng Ma <mawupeng1(a)huawei.com> --- drivers/devfreq/rk3399_dmc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/devfreq/rk3399_dmc.c b/drivers/devfreq/rk3399_dmc.c index e795ad2b3f6b..eefda6edc89c 100644 --- a/drivers/devfreq/rk3399_dmc.c +++ b/drivers/devfreq/rk3399_dmc.c @@ -411,6 +411,8 @@ static int rk3399_dmcfreq_remove(struct platform_device *pdev) { struct rk3399_dmcfreq *dmcfreq = dev_get_drvdata(&pdev->dev); + devfreq_event_disable_edev(dmcfreq->edev); + /* * Before remove the opp table we need to unregister the opp notifier. */ -- 2.43.0

2 1

[PATCH OLK-6.6] ovl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_up
by Yifan Qiao 28 Mar '25

28 Mar '25

From: Vasiliy Kovalev <kovalev(a)altlinux.org> mainline inclusion from mainline-v6.14-rc5 commit c84e125fff2615b4d9c259e762596134eddd2f27 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBWVT6 CVE: CVE-2025-21887 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- The issue was caused by dput(upper) being called before ovl_dentry_update_reval(), while upper->d_flags was still accessed in ovl_dentry_remote(). Move dput(upper) after its last use to prevent use-after-free. BUG: KASAN: slab-use-after-free in ovl_dentry_remote fs/overlayfs/util.c:162 [inline] BUG: KASAN: slab-use-after-free in ovl_dentry_update_reval+0xd2/0xf0 fs/overlayfs/util.c:167 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 ovl_dentry_remote fs/overlayfs/util.c:162 [inline] ovl_dentry_update_reval+0xd2/0xf0 fs/overlayfs/util.c:167 ovl_link_up fs/overlayfs/copy_up.c:610 [inline] ovl_copy_up_one+0x2105/0x3490 fs/overlayfs/copy_up.c:1170 ovl_copy_up_flags+0x18d/0x200 fs/overlayfs/copy_up.c:1223 ovl_rename+0x39e/0x18c0 fs/overlayfs/dir.c:1136 vfs_rename+0xf84/0x20a0 fs/namei.c:4893 ... </TASK> Fixes: b07d5cc93e1b ("ovl: update of dentry revalidate flags after copy up") Reported-by: syzbot+316db8a1191938280eb6(a)syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=316db8a1191938280eb6 Signed-off-by: Vasiliy Kovalev <kovalev(a)altlinux.org> Link: https://lore.kernel.org/r/20250214215148.761147-1-kovalev@altlinux.org Reviewed-by: Amir Goldstein <amir73il(a)gmail.com> Signed-off-by: Christian Brauner <brauner(a)kernel.org> Signed-off-by: Yifan Qiao <qiaoyifan4(a)huawei.com> --- fs/overlayfs/copy_up.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c index 18e018cb1811..dbf7b3cd70ca 100644 --- a/fs/overlayfs/copy_up.c +++ b/fs/overlayfs/copy_up.c @@ -570,7 +570,6 @@ static int ovl_link_up(struct ovl_copy_up_ctx *c) err = PTR_ERR(upper); if (!IS_ERR(upper)) { err = ovl_do_link(ofs, ovl_dentry_upper(c->dentry), udir, upper); - dput(upper); if (!err) { /* Restore timestamps on parent (best effort) */ @@ -578,6 +577,7 @@ static int ovl_link_up(struct ovl_copy_up_ctx *c) ovl_dentry_set_upper_alias(c->dentry); ovl_dentry_update_reval(c->dentry, upper); } + dput(upper); } inode_unlock(udir); if (err) -- 2.39.2

2 1

[PATCH OLK-5.10] ovl: fix UAF in ovl_dentry_update_reval by moving dput() in ovl_link_up
by Yifan Qiao 28 Mar '25

28 Mar '25

From: Vasiliy Kovalev <kovalev(a)altlinux.org> mainline inclusion from mainline-v6.14-rc5 commit c84e125fff2615b4d9c259e762596134eddd2f27 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBWVT6 CVE: CVE-2025-21887 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- The issue was caused by dput(upper) being called before ovl_dentry_update_reval(), while upper->d_flags was still accessed in ovl_dentry_remote(). Move dput(upper) after its last use to prevent use-after-free. BUG: KASAN: slab-use-after-free in ovl_dentry_remote fs/overlayfs/util.c:162 [inline] BUG: KASAN: slab-use-after-free in ovl_dentry_update_reval+0xd2/0xf0 fs/overlayfs/util.c:167 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 ovl_dentry_remote fs/overlayfs/util.c:162 [inline] ovl_dentry_update_reval+0xd2/0xf0 fs/overlayfs/util.c:167 ovl_link_up fs/overlayfs/copy_up.c:610 [inline] ovl_copy_up_one+0x2105/0x3490 fs/overlayfs/copy_up.c:1170 ovl_copy_up_flags+0x18d/0x200 fs/overlayfs/copy_up.c:1223 ovl_rename+0x39e/0x18c0 fs/overlayfs/dir.c:1136 vfs_rename+0xf84/0x20a0 fs/namei.c:4893 ... </TASK> Fixes: b07d5cc93e1b ("ovl: update of dentry revalidate flags after copy up") Reported-by: syzbot+316db8a1191938280eb6(a)syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=316db8a1191938280eb6 Signed-off-by: Vasiliy Kovalev <kovalev(a)altlinux.org> Link: https://lore.kernel.org/r/20250214215148.761147-1-kovalev@altlinux.org Reviewed-by: Amir Goldstein <amir73il(a)gmail.com> Signed-off-by: Christian Brauner <brauner(a)kernel.org> Signed-off-by: Yifan Qiao <qiaoyifan4(a)huawei.com> --- fs/overlayfs/copy_up.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c index 65ac504595ba..a1ec45fc77d8 100644 --- a/fs/overlayfs/copy_up.c +++ b/fs/overlayfs/copy_up.c @@ -469,7 +469,6 @@ static int ovl_link_up(struct ovl_copy_up_ctx *c) err = PTR_ERR(upper); if (!IS_ERR(upper)) { err = ovl_do_link(ovl_dentry_upper(c->dentry), udir, upper); - dput(upper); if (!err) { /* Restore timestamps on parent (best effort) */ @@ -477,6 +476,7 @@ static int ovl_link_up(struct ovl_copy_up_ctx *c) ovl_dentry_set_upper_alias(c->dentry); ovl_dentry_update_reval(c->dentry, upper); } + dput(upper); } inode_unlock(udir); if (err) -- 2.39.2

2 1

[openeuler:openEuler-1.0-LTS 1525/1525] drivers/char/svm.c:249:20: sparse: sparse: symbol 'svm_find_mem_reg_node' was not declared. Should it be static?
by kernel test robot 28 Mar '25

28 Mar '25

tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 3f8283040b83a49bdad8dc3dd4ccd3f50910af28 commit: 9469d1759c2905dcef49df7e6240ad5c32b66296 [1525/1525] ascend: share_pool: enable svm to use share pool memory config: arm64-randconfig-r112-20250328 (https://download.01.org/0day-ci/archive/20250328/202503281257.212dRYe6-lkp@…) compiler: aarch64-linux-gcc (GCC) 14.2.0 reproduce: (https://download.01.org/0day-ci/archive/20250328/202503281257.212dRYe6-lkp@…) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp(a)intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202503281257.212dRYe6-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) drivers/char/svm.c:240:24: sparse: sparse: symbol 'va2pa_trunk' was not declared. Should it be static? >> drivers/char/svm.c:249:20: sparse: sparse: symbol 'svm_find_mem_reg_node' was not declared. Should it be static? >> drivers/char/svm.c:320:14: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct svm_va2pa_slot *slot @@ got void [noderef] __iomem * @@ drivers/char/svm.c:320:14: sparse: expected struct svm_va2pa_slot *slot drivers/char/svm.c:320:14: sparse: got void [noderef] __iomem * drivers/char/svm.c:338:28: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void volatile [noderef] __iomem *addr @@ got struct svm_va2pa_slot *[addressable] [assigned] [toplevel] slots @@ drivers/char/svm.c:338:28: sparse: expected void volatile [noderef] __iomem *addr drivers/char/svm.c:338:28: sparse: got struct svm_va2pa_slot *[addressable] [assigned] [toplevel] slots drivers/char/svm.c:419:6: sparse: sparse: symbol 'sysrq_sched_debug_show_export' was not declared. Should it be static? drivers/char/svm.c:1242:35: sparse: sparse: Using plain integer as NULL pointer drivers/char/svm.c:1502:5: sparse: sparse: symbol '__svm_get_mpam' was not declared. Should it be static? drivers/char/svm.c:249:21: warning: no previous prototype for 'svm_find_mem_reg_node' [-Wmissing-prototypes] 249 | struct device_node *svm_find_mem_reg_node(struct device *dev, const char *compat) | ^~~~~~~~~~~~~~~~~~~~~ drivers/char/svm.c:419:6: warning: no previous prototype for 'sysrq_sched_debug_show_export' [-Wmissing-prototypes] 419 | void sysrq_sched_debug_show_export(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/char/svm.c:1429:5: warning: no previous prototype for 'svm_get_pasid' [-Wmissing-prototypes] 1429 | int svm_get_pasid(pid_t vpid, int dev_id __maybe_unused) | ^~~~~~~~~~~~~ drivers/char/svm.c:1502:5: warning: no previous prototype for '__svm_get_mpam' [-Wmissing-prototypes] 1502 | int __svm_get_mpam(struct svm_mpam *mpam) | ^~~~~~~~~~~~~~ drivers/char/svm.c:2437:36: warning: 'svm_acpi_match' defined but not used [-Wunused-const-variable=] 2437 | static const struct acpi_device_id svm_acpi_match[] = { | ^~~~~~~~~~~~~~ In file included from arch/arm64/include/asm/atomic.h:34, from include/linux/atomic.h:7, from include/asm-generic/bitops/atomic.h:5, from arch/arm64/include/asm/bitops.h:37, from include/linux/bitops.h:19, from include/linux/kernel.h:11, from include/asm-generic/bug.h:18, from arch/arm64/include/asm/bug.h:37, from arch/arm64/include/asm/memory.h:27, from arch/arm64/include/asm/esr.h:21, from drivers/char/svm.c:10: In function '__cmpxchg_case_mb_4', inlined from '__cmpxchg_mb' at arch/arm64/include/asm/cmpxchg.h:143:1, inlined from 'svm_proc_load_flag' at drivers/char/svm.c:1967:12: arch/arm64/include/asm/atomic_lse.h:492:9: warning: array subscript 'long unsigned int[0]' is partly outside array bounds of 'atomic_t[1]' [-Warray-bounds=] 492 | asm volatile( 44- | ^~~ arch/arm64/include/asm/atomic_lse.h:523:1: note: in expansion of macro '__CMPXCHG_CASE' 523 | __CMPXCHG_CASE(w, , mb_4, al, "memory") | ^~~~~~~~~~~~~~ drivers/char/svm.c: In function 'svm_proc_load_flag': drivers/char/svm.c:1958:25: note: object 'l2buf_load_flag' of size 4 1958 | static atomic_t l2buf_load_flag = ATOMIC_INIT(0); | ^~~~~~~~~~~~~~~ In function '__cmpxchg_case_mb_4', inlined from '__cmpxchg_mb' at arch/arm64/include/asm/cmpxchg.h:143:1, inlined from 'svm_proc_load_flag' at drivers/char/svm.c:1967:12: arch/arm64/include/asm/atomic_lse.h:492:9: warning: array subscript 'long unsigned int[0]' is partly outside array bounds of 'atomic_t[1]' [-Warray-bounds=] 492 | asm volatile( 57- | ^~~ arch/arm64/include/asm/atomic_lse.h:523:1: note: in expansion of macro '__CMPXCHG_CASE' 523 | __CMPXCHG_CASE(w, , mb_4, al, "memory") | ^~~~~~~~~~~~~~ drivers/char/svm.c: In function 'svm_proc_load_flag': drivers/char/svm.c:1958:25: note: object 'l2buf_load_flag' of size 4 1958 | static atomic_t l2buf_load_flag = ATOMIC_INIT(0); | ^~~~~~~~~~~~~~~ vim +/svm_find_mem_reg_node +249 drivers/char/svm.c 248 > 249 struct device_node *svm_find_mem_reg_node(struct device *dev, const char *compat) 250 { 251 int index = 0; 252 struct device_node *tmp = NULL; 253 struct device_node *np = dev->of_node; 254 255 for (; ; index++) { 256 tmp = of_parse_phandle(np, "memory-region", index); 257 if (!tmp) 258 break; 259 260 if (of_device_is_compatible(tmp, compat)) 261 return tmp; 262 263 of_node_put(tmp); 264 } 265 266 return NULL; 267 } 268 269 static int svm_parse_trunk_memory(struct device *dev, phys_addr_t *base, unsigned long *size) 270 { 271 int err; 272 struct resource r; 273 struct device_node *trunk = NULL; 274 275 trunk = svm_find_mem_reg_node(dev, SVM_MEM_REG); 276 if (!trunk) { 277 dev_err(dev, "Didn't find reserved memory\n"); 278 return -EINVAL; 279 } 280 281 err = of_address_to_resource(trunk, 0, &r); 282 of_node_put(trunk); 283 if (err) { 284 dev_err(dev, "Couldn't address to resource for reserved memory\n"); 285 return -ENOMEM; 286 } 287 288 *base = r.start; 289 *size = resource_size(&r); 290 291 return 0; 292 } 293 294 static int svm_setup_trunk(struct device *dev, phys_addr_t base, unsigned long size) 295 { 296 int slot_total; 297 unsigned long *bitmap = NULL; 298 struct svm_va2pa_slot *slot = NULL; 299 300 if (!IS_ALIGNED(base, SVM_VA2PA_MEMORY_ALIGN)) { 301 dev_err(dev, "Didn't aligned to %u\n", SVM_VA2PA_MEMORY_ALIGN); 302 return -EINVAL; 303 } 304 305 if ((size == 0) || (size > SVM_VA2PA_TRUNK_SIZE_MAX)) { 306 dev_err(dev, "Size of reserved memory is not right\n"); 307 return -EINVAL; 308 } 309 310 slot_total = size / SVM_VA2PA_SLOT_SIZE; 311 if (slot_total < BITS_PER_LONG) 312 return -EINVAL; 313 314 bitmap = kvcalloc(slot_total / BITS_PER_LONG, sizeof(unsigned long), GFP_KERNEL); 315 if (!bitmap) { 316 dev_err(dev, "alloc memory failed\n"); 317 return -ENOMEM; 318 } 319 > 320 slot = ioremap(base, size); 321 if (!slot) { 322 kvfree(bitmap); 323 dev_err(dev, "Ioremap trunk failed\n"); 324 return -ENXIO; 325 } 326 327 va2pa_trunk.slots = slot; 328 va2pa_trunk.slot_used = 0; 329 va2pa_trunk.slot_total = slot_total; 330 va2pa_trunk.bitmap = bitmap; 331 mutex_init(&va2pa_trunk.mutex); 332 333 return 0; 334 } 335 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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Kernel SIG双周例会
by openEuler conference 28 Mar '25

28 Mar '25

您好！ Kernel 邀请您参加 2025-03-28 14:00 召开的WeLink会议(自动录制) 会议主题：Kernel SIG双周例会会议链接：https://meeting.huaweicloud.com:36443/#/j/964258324 会议纪要：https://etherpad.openeuler.org/p/Kernel-meetings 更多资讯尽在：https://www.openeuler.org/zh/ Hello! Kernel invites you to attend the WeLink conference(auto recording) will be held at 2025-03-28 14:00, The subject of the conference is Kernel SIG双周例会 You can join the meeting at https://meeting.huaweicloud.com:36443/#/j/964258324 Add topics at https://etherpad.openeuler.org/p/Kernel-meetings More information: https://www.openeuler.org/en/

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[openeuler:OLK-6.6] BUILD REGRESSION b28aab59b06935f0d1c9bce8f013f25b4094764d
by kernel test robot 28 Mar '25

28 Mar '25

tree/branch: https://gitee.com/openeuler/kernel.git OLK-6.6 branch HEAD: b28aab59b06935f0d1c9bce8f013f25b4094764d !15593 io_uring: prevent opcode speculation Error/Warning (recently discovered and may have been fixed): https://lore.kernel.org/oe-kbuild-all/202503280313.olFyEFIT-lkp@intel.com https://lore.kernel.org/oe-kbuild/202503271832.WycjTkRa-lkp@intel.com clang: warning: -Wl,-soname=linux-ilp32-vdso.so.1: 'linker' input unused [-Wunused-command-line-argument] error: unknown target ABI 'ilp32' Unverified Error/Warning (likely false positive, kindly check if interested): drivers/hid/hid-thrustmaster.c:178 thrustmaster_interrupts() warn: possible memory leak of 'send_buf' Error/Warning ids grouped by kconfigs: recent_errors |-- arm64-allmodconfig | |-- arch-arm64-kvm-virtcca_cvm.c:warning:no-previous-prototype-for-function-virtcca_get_tmi_version | |-- drivers-coda-coda_pci.c:warning:Excess-function-parameter-pdev-description-in-virtcca_pci_get_rom_size | |-- drivers-coda-coda_pci.c:warning:Function-parameter-or-member-p-not-described-in-virtcca_pci_get_rom_size | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- arm64-allnoconfig | |-- kismet:WARNING:unmet-direct-dependencies-detected-for-HALTPOLL_CPUIDLE-when-selected-by-ARM64 | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- arm64-defconfig | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- arm64-randconfig-002-20250327 | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- arm64-randconfig-003-20250327 | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- arm64-randconfig-004-20250327 | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- arm64-randconfig-r112-20250328 | |-- clang:warning:Wl-soname-linux-ilp32-vdso.so.:linker-input-unused | `-- error:unknown-target-ABI-ilp32 |-- loongarch-allmodconfig | |-- arch-loongarch-mm-cache.c:warning:variable-way_size-set-but-not-used | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- loongarch-allnoconfig | |-- arch-loongarch-mm-cache.c:warning:variable-way_size-set-but-not-used | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- loongarch-allyesconfig | |-- arch-loongarch-mm-cache.c:warning:variable-way_size-set-but-not-used | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- loongarch-defconfig | |-- arch-loongarch-mm-cache.c:warning:variable-way_size-set-but-not-used | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- loongarch-randconfig-002-20250327 | |-- arch-loongarch-mm-cache.c:warning:variable-way_size-set-but-not-used | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- loongarch-randconfig-r061-20250327 | |-- arch-loongarch-mm-cache.c:warning:variable-way_size-set-but-not-used | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- x86_64-allnoconfig | |-- kismet:WARNING:unmet-direct-dependencies-detected-for-ACPI_HOTPLUG_IGNORE_OSC-when-selected-by-X86 | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- x86_64-allyesconfig | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- x86_64-buildonly-randconfig-001-20250327 | |-- drivers-gpu-drm-sti-sti_dvo.c:error:implicit-declaration-of-function-devm_ioremap | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- x86_64-buildonly-randconfig-002-20250327 | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- x86_64-buildonly-randconfig-003-20250327 | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- x86_64-buildonly-randconfig-004-20250327 | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- x86_64-buildonly-randconfig-005-20250327 | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- x86_64-buildonly-randconfig-006-20250327 | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- x86_64-defconfig | |-- mm-memory.c:warning:variable-nr_pages-set-but-not-used | `-- mm-mempolicy.c:warning:writing-byte-into-a-region-of-size |-- x86_64-randconfig-101-20250328 | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- x86_64-randconfig-102-20250328 | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- x86_64-randconfig-103-20250328 | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- x86_64-randconfig-104-20250328 | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- x86_64-randconfig-121-20250328 | |-- include-linux-userfaultfd_k.h:sparse:sparse:incorrect-type-in-argument-(different-base-types)-expected-restricted-uffd_flags_t-usertype-flags-got-unsigned-int-enum-mfill_atomic_mode-mode | |-- include-linux-userfaultfd_k.h:sparse:sparse:restricted-uffd_flags_t-degrades-to-integer | |-- mm-memblock.c:sparse:sparse:symbol-memblock_alloc_range_nid_flags-was-not-declared.-Should-it-be-static | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- x86_64-randconfig-122-20250328 | |-- mm-memblock.c:sparse:sparse:symbol-memblock_alloc_range_nid_flags-was-not-declared.-Should-it-be-static | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- x86_64-randconfig-123-20250328 | |-- mm-memblock.c:sparse:sparse:symbol-memblock_alloc_range_nid_flags-was-not-declared.-Should-it-be-static | `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used |-- x86_64-randconfig-161-20250326 | `-- drivers-hid-hid-thrustmaster.c-thrustmaster_interrupts()-warn:possible-memory-leak-of-send_buf `-- x86_64-randconfig-161-20250327 `-- mm-memory.c:warning:variable-nr_pages-set-but-not-used elapsed time: 1448m configs tested: 21 configs skipped: 124 tested configs: arm64 allmodconfig clang-19 arm64 allnoconfig gcc-14.2.0 arm64 defconfig gcc-14.2.0 arm64 randconfig-001-20250327 gcc-5.5.0 arm64 randconfig-002-20250327 clang-21 arm64 randconfig-003-20250327 clang-21 arm64 randconfig-004-20250327 clang-21 loongarch allmodconfig gcc-14.2.0 loongarch allnoconfig gcc-14.2.0 loongarch defconfig gcc-14.2.0 loongarch randconfig-001-20250327 gcc-14.2.0 loongarch randconfig-002-20250327 gcc-14.2.0 x86_64 allnoconfig clang-20 x86_64 allyesconfig clang-20 x86_64 buildonly-randconfig-001-20250327 gcc-12 x86_64 buildonly-randconfig-002-20250327 gcc-12 x86_64 buildonly-randconfig-003-20250327 clang-20 x86_64 buildonly-randconfig-004-20250327 clang-20 x86_64 buildonly-randconfig-005-20250327 gcc-12 x86_64 buildonly-randconfig-006-20250327 gcc-12 x86_64 defconfig gcc-11 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[PATCH openEuler-1.0-LTS] arm64: cacheinfo: Avoid out-of-bounds write to cacheinfo array
by Wupeng Ma 28 Mar '25

28 Mar '25

From: Radu Rendec <rrendec(a)redhat.com> stable inclusion from stable-v5.10.235 commit e4fde33107351ec33f1a64188612fbc6ca659284 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBPC4K CVE: CVE-2025-21785 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 875d742cf5327c93cba1f11e12b08d3cce7a88d2 ] The loop that detects/populates cache information already has a bounds check on the array size but does not account for cache levels with separate data/instructions cache. Fix this by incrementing the index for any populated leaf (instead of any populated level). Fixes: 5d425c186537 ("arm64: kernel: add support for cpu cache information") Signed-off-by: Radu Rendec <rrendec(a)redhat.com> Link: https://lore.kernel.org/r/20250206174420.2178724-1-rrendec@redhat.com Signed-off-by: Will Deacon <will(a)kernel.org> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Wupeng Ma <mawupeng1(a)huawei.com> --- arch/arm64/kernel/cacheinfo.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/arch/arm64/kernel/cacheinfo.c b/arch/arm64/kernel/cacheinfo.c index 0c0cd4d26b87..80a4ab1c43fd 100644 --- a/arch/arm64/kernel/cacheinfo.c +++ b/arch/arm64/kernel/cacheinfo.c @@ -96,16 +96,18 @@ static int __populate_cache_leaves(unsigned int cpu) unsigned int level, idx; enum cache_type type; struct cpu_cacheinfo *this_cpu_ci = get_cpu_cacheinfo(cpu); - struct cacheinfo *this_leaf = this_cpu_ci->info_list; + struct cacheinfo *infos = this_cpu_ci->info_list; for (idx = 0, level = 1; level <= this_cpu_ci->num_levels && - idx < this_cpu_ci->num_leaves; idx++, level++) { + idx < this_cpu_ci->num_leaves; level++) { type = get_cache_type(level); if (type == CACHE_TYPE_SEPARATE) { - ci_leaf_init(this_leaf++, CACHE_TYPE_DATA, level); - ci_leaf_init(this_leaf++, CACHE_TYPE_INST, level); + if (idx + 1 >= this_cpu_ci->num_leaves) + break; + ci_leaf_init(&infos[idx++], CACHE_TYPE_DATA, level); + ci_leaf_init(&infos[idx++], CACHE_TYPE_INST, level); } else { - ci_leaf_init(this_leaf++, type, level); + ci_leaf_init(&infos[idx++], type, level); } } return 0; -- 2.43.0

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