June 2024 - Kernel - mailweb.openeuler.org

[PATCH openEuler-1.0-LTS] Revert "x86/mm/ident_map: Use gbpages only where full GB page should be mapped."
by Jinjiang Tu 24 Jun '24

24 Jun '24

From: Ingo Molnar <mingo(a)kernel.org> stable inclusion from stable-v4.19.312 commit b66762945d3289d472cedfca81dd98f9d8efe3b7 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IA7NWS CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit c567f2948f57bdc03ed03403ae0234085f376b7d upstream. This reverts commit d794734c9bbfe22f86686dc2909c25f5ffe1a572. While the original change tries to fix a bug, it also unintentionally broke existing systems, see the regressions reported at: https://lore.kernel.org/all/3a1b9909-45ac-4f97-ad68-d16ef1ce99db@pavinjosep… Since d794734c9bbf was also marked for -stable, let's back it out before causing more damage. Note that due to another upstream change the revert was not 100% automatic: 0a845e0f6348 mm/treewide: replace pud_large() with pud_leaf() Signed-off-by: Ingo Molnar <mingo(a)kernel.org> Cc: <stable(a)vger.kernel.org> Cc: Russ Anderson <rja(a)hpe.com> Cc: Steve Wahl <steve.wahl(a)hpe.com> Cc: Dave Hansen <dave.hansen(a)linux.intel.com> Link: https://lore.kernel.org/all/3a1b9909-45ac-4f97-ad68-d16ef1ce99db@pavinjosep… Fixes: d794734c9bbf ("x86/mm/ident_map: Use gbpages only where full GB page should be mapped.") Signed-off-by: Steve Wahl <steve.wahl(a)hpe.com> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Jinjiang Tu <tujinjiang(a)huawei.com> --- arch/x86/mm/ident_map.c | 23 +++++------------------ 1 file changed, 5 insertions(+), 18 deletions(-) diff --git a/arch/x86/mm/ident_map.c b/arch/x86/mm/ident_map.c index b33de3a85549..fe7a12599d8e 100644 --- a/arch/x86/mm/ident_map.c +++ b/arch/x86/mm/ident_map.c @@ -26,31 +26,18 @@ static int ident_pud_init(struct x86_mapping_info *info, pud_t *pud_page, for (; addr < end; addr = next) { pud_t *pud = pud_page + pud_index(addr); pmd_t *pmd; - bool use_gbpage; next = (addr & PUD_MASK) + PUD_SIZE; if (next > end) next = end; - /* if this is already a gbpage, this portion is already mapped */ - if (pud_large(*pud)) - continue; - - /* Is using a gbpage allowed? */ - use_gbpage = info->direct_gbpages; - - /* Don't use gbpage if it maps more than the requested region. */ - /* at the begining: */ - use_gbpage &= ((addr & ~PUD_MASK) == 0); - /* ... or at the end: */ - use_gbpage &= ((next & ~PUD_MASK) == 0); - - /* Never overwrite existing mappings */ - use_gbpage &= !pud_present(*pud); - - if (use_gbpage) { + if (info->direct_gbpages) { pud_t pudval; + if (pud_present(*pud)) + continue; + + addr &= PUD_MASK; pudval = __pud((addr - info->offset) | info->page_flag); set_pud(pud, pudval); continue; -- 2.25.1

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[PATCH OLK-5.10] tracing: Fix permissions for the buffer_percent file
by Zheng Yejian 24 Jun '24

24 Jun '24

From: Ondrej Mosnacek <omosnace(a)redhat.com> mainline inclusion from mainline-v6.4-rc1 commit 4f94559f40ad06d627c0fdfc3319cec778a2845b category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IA7NPI Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- This file defines both read and write operations, yet it is being created as read-only. This means that it can't be written to without the CAP_DAC_OVERRIDE capability. Fix the permissions to allow root to write to it without the need to override DAC perms. Link: https://lore.kernel.org/linux-trace-kernel/20230503140114.3280002-1-omosnac… Cc: stable(a)vger.kernel.org Cc: Masami Hiramatsu <mhiramat(a)kernel.org> Fixes: 03329f993978 ("tracing: Add tracefs file buffer_percentage") Signed-off-by: Ondrej Mosnacek <omosnace(a)redhat.com> Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org> Signed-off-by: Zheng Yejian <zhengyejian1(a)huawei.com> --- kernel/trace/trace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 7d25b898f440..4c1f7acf38c4 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -9220,7 +9220,7 @@ init_tracer_tracefs(struct trace_array *tr, struct dentry *d_tracer) tr->buffer_percent = 50; - trace_create_file("buffer_percent", TRACE_MODE_READ, d_tracer, + trace_create_file("buffer_percent", TRACE_MODE_WRITE, d_tracer, tr, &buffer_percent_fops); create_trace_options_dir(tr); -- 2.25.1

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[PATCH openEuler-22.03-LTS-SP1] powerpc/powernv: Add a null pointer check in opal_powercap_init()
by Zhang Zekun 24 Jun '24

24 Jun '24

From: Kunwu Chan <chentao(a)kylinos.cn> stable inclusion from stable-v5.10.209 commit a67a04ad05acb56640798625e73fa54d6d41cce1 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9Q9HG CVE: CVE-2023-52696 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit e123015c0ba859cf48aa7f89c5016cc6e98e018d ] kasprintf() returns a pointer to dynamically allocated memory which can be NULL upon failure. Fixes: b9ef7b4b867f ("powerpc: Convert to using %pOFn instead of device_node.name") Signed-off-by: Kunwu Chan <chentao(a)kylinos.cn> Signed-off-by: Michael Ellerman <mpe(a)ellerman.id.au> Link: https://msgid.link/20231126095739.1501990-1-chentao@kylinos.cn Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: sanglipeng1 <sanglipeng1(a)jd.com> Signed-off-by: Zhang Zekun <zhangzekun11(a)huawei.com> --- arch/powerpc/platforms/powernv/opal-powercap.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/powerpc/platforms/powernv/opal-powercap.c b/arch/powerpc/platforms/powernv/opal-powercap.c index c16d44f6f1d1..ce9ec3962cef 100644 --- a/arch/powerpc/platforms/powernv/opal-powercap.c +++ b/arch/powerpc/platforms/powernv/opal-powercap.c @@ -196,6 +196,12 @@ void __init opal_powercap_init(void) j = 0; pcaps[i].pg.name = kasprintf(GFP_KERNEL, "%pOFn", node); + if (!pcaps[i].pg.name) { + kfree(pcaps[i].pattrs); + kfree(pcaps[i].pg.attrs); + goto out_pcaps_pattrs; + } + if (has_min) { powercap_add_attr(min, "powercap-min", &pcaps[i].pattrs[j]); -- 2.17.1

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[PATCH openEuler-1.0-LTS] net: qcom/emac: fix UAF in emac_remove
by Ze Zuo 23 Jun '24

23 Jun '24

From: Pavel Skripkin <paskripkin(a)gmail.com> stable inclusion from stable-v4.19.199 commit 11e9d163d631198bb3eb41a677a61b499516c0f7 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/pulls/8979 CVE: CVE-2021-47311 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- commit ad297cd2db8953e2202970e9504cab247b6c7cb4 upstream. adpt is netdev private data and it cannot be used after free_netdev() call. Using adpt after free_netdev() can cause UAF bug. Fix it by moving free_netdev() at the end of the function. Fixes: 54e19bc74f33 ("net: qcom/emac: do not use devm on internal phy pdev") Signed-off-by: Pavel Skripkin <paskripkin(a)gmail.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Signed-off-by: Ze Zuo <zuoze1(a)huawei.com> --- drivers/net/ethernet/qualcomm/emac/emac.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/qualcomm/emac/emac.c b/drivers/net/ethernet/qualcomm/emac/emac.c index b10f2bcf8506..938602864c24 100644 --- a/drivers/net/ethernet/qualcomm/emac/emac.c +++ b/drivers/net/ethernet/qualcomm/emac/emac.c @@ -754,12 +754,13 @@ static int emac_remove(struct platform_device *pdev) put_device(&adpt->phydev->mdio.dev); mdiobus_unregister(adpt->mii_bus); - free_netdev(netdev); if (adpt->phy.digital) iounmap(adpt->phy.digital); iounmap(adpt->phy.base); + free_netdev(netdev); + return 0; } -- 2.25.1

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[PATCH OLK-5.10] sched: ARM64 enables SIS_PROP and disables SIS_UTIL"
by Hui Tang 23 Jun '24

23 Jun '24

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IA7CCA CVE: NA -------------------------------- We find the commit bb29df9fb065 ("sched/fair: Introduce SIS_UTIL to search idle CPU..."), which cause performance degradation with Unixbench pipe-base contextswich case tested on Kunpeng 920B. Test case: ./Run context1 -c `nproc` -i 3 Unixbench results (Pipe-based_Context_Switching): baseline patched 4.5w 8.5w Test on Kunpeng 920B Fixes: bb29df9fb065 ("sched/fair: Introduce SIS_UTIL to search idle CPU...") Signed-off-by: Hui Tang <tanghui20(a)huawei.com> --- kernel/sched/features.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/sched/features.h b/kernel/sched/features.h index 83f524cea64d..1b789ae9079c 100644 --- a/kernel/sched/features.h +++ b/kernel/sched/features.h @@ -54,8 +54,8 @@ SCHED_FEAT(TTWU_QUEUE, true) /* * When doing wakeups, attempt to limit superfluous scans of the LLC domain. */ -SCHED_FEAT(SIS_PROP, false) -SCHED_FEAT(SIS_UTIL, true) +SCHED_FEAT(SIS_PROP, true) +SCHED_FEAT(SIS_UTIL, false) #ifdef CONFIG_SCHED_STEAL /* -- 2.34.1

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[PATCH OLK-6.6] net: bridge: xmit: make sure we have at least eth header len bytes
by Zhengchao Shao 23 Jun '24

23 Jun '24

From: Nikolay Aleksandrov <razor(a)blackwall.org> stable inclusion from stable-v6.6.33 commit 1abb371147905ba250b4cc0230c4be7e90bea4d5 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IA6SHY CVE: CVE-2024-38538 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit 8bd67ebb50c0145fd2ca8681ab65eb7e8cde1afc ] syzbot triggered an uninit value[1] error in bridge device's xmit path by sending a short (less than ETH_HLEN bytes) skb. To fix it check if we can actually pull that amount instead of assuming. Tested with dropwatch: drop at: br_dev_xmit+0xb93/0x12d0 [bridge] (0xffffffffc06739b3) origin: software timestamp: Mon May 13 11:31:53 2024 778214037 nsec protocol: 0x88a8 length: 2 original length: 2 drop reason: PKT_TOO_SMALL [1] BUG: KMSAN: uninit-value in br_dev_xmit+0x61d/0x1cb0 net/bridge/br_device.c:65 br_dev_xmit+0x61d/0x1cb0 net/bridge/br_device.c:65 __netdev_start_xmit include/linux/netdevice.h:4903 [inline] netdev_start_xmit include/linux/netdevice.h:4917 [inline] xmit_one net/core/dev.c:3531 [inline] dev_hard_start_xmit+0x247/0xa20 net/core/dev.c:3547 __dev_queue_xmit+0x34db/0x5350 net/core/dev.c:4341 dev_queue_xmit include/linux/netdevice.h:3091 [inline] __bpf_tx_skb net/core/filter.c:2136 [inline] __bpf_redirect_common net/core/filter.c:2180 [inline] __bpf_redirect+0x14a6/0x1620 net/core/filter.c:2187 ____bpf_clone_redirect net/core/filter.c:2460 [inline] bpf_clone_redirect+0x328/0x470 net/core/filter.c:2432 ___bpf_prog_run+0x13fe/0xe0f0 kernel/bpf/core.c:1997 __bpf_prog_run512+0xb5/0xe0 kernel/bpf/core.c:2238 bpf_dispatcher_nop_func include/linux/bpf.h:1234 [inline] __bpf_prog_run include/linux/filter.h:657 [inline] bpf_prog_run include/linux/filter.h:664 [inline] bpf_test_run+0x499/0xc30 net/bpf/test_run.c:425 bpf_prog_test_run_skb+0x14ea/0x1f20 net/bpf/test_run.c:1058 bpf_prog_test_run+0x6b7/0xad0 kernel/bpf/syscall.c:4269 __sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5678 __do_sys_bpf kernel/bpf/syscall.c:5767 [inline] __se_sys_bpf kernel/bpf/syscall.c:5765 [inline] __x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5765 x64_sys_call+0x96b/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:322 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Reported-by: syzbot+a63a1f6a062033cf0f40(a)syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=a63a1f6a062033cf0f40 Signed-off-by: Nikolay Aleksandrov <razor(a)blackwall.org> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Zhengchao Shao <shaozhengchao(a)huawei.com> --- net/bridge/br_device.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c index 9a5ea06236bd..42d4c3727bf7 100644 --- a/net/bridge/br_device.c +++ b/net/bridge/br_device.c @@ -27,6 +27,7 @@ EXPORT_SYMBOL_GPL(nf_br_ops); /* net device transmit always called with BH disabled */ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev) { + enum skb_drop_reason reason = pskb_may_pull_reason(skb, ETH_HLEN); struct net_bridge_mcast_port *pmctx_null = NULL; struct net_bridge *br = netdev_priv(dev); struct net_bridge_mcast *brmctx = &br->multicast_ctx; @@ -38,6 +39,11 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev) const unsigned char *dest; u16 vid = 0; + if (unlikely(reason != SKB_NOT_DROPPED_YET)) { + kfree_skb_reason(skb, reason); + return NETDEV_TX_OK; + } + memset(skb->cb, 0, sizeof(struct br_input_skb_cb)); br_tc_skb_miss_set(skb, false); -- 2.34.1

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[PATCH OLK-6.6] net: sched: sch_multiq: fix possible OOB write in multiq_tune()
by Zhengchao Shao 23 Jun '24

23 Jun '24

From: Hangyu Hua <hbh25y(a)gmail.com> stable inclusion from stable-v6.6.35 commit 54c2c171c11a798fe887b3ff72922aa9d1411c1e category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IA6R4J CVE: CVE-2024-36978 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id… -------------------------------- [ Upstream commit affc18fdc694190ca7575b9a86632a73b9fe043d ] q->bands will be assigned to qopt->bands to execute subsequent code logic after kmalloc. So the old q->bands should not be used in kmalloc. Otherwise, an out-of-bounds write will occur. Fixes: c2999f7fb05b ("net: sched: multiq: don't call qdisc_put() while holding tree lock") Signed-off-by: Hangyu Hua <hbh25y(a)gmail.com> Acked-by: Cong Wang <cong.wang(a)bytedance.com> Signed-off-by: David S. Miller <davem(a)davemloft.net> Signed-off-by: Sasha Levin <sashal(a)kernel.org> Signed-off-by: Zhengchao Shao <shaozhengchao(a)huawei.com> --- net/sched/sch_multiq.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/sched/sch_multiq.c b/net/sched/sch_multiq.c index 75c9c860182b..0d6649d937c9 100644 --- a/net/sched/sch_multiq.c +++ b/net/sched/sch_multiq.c @@ -185,7 +185,7 @@ static int multiq_tune(struct Qdisc *sch, struct nlattr *opt, qopt->bands = qdisc_dev(sch)->real_num_tx_queues; - removed = kmalloc(sizeof(*removed) * (q->max_bands - q->bands), + removed = kmalloc(sizeof(*removed) * (q->max_bands - qopt->bands), GFP_KERNEL); if (!removed) return -ENOMEM; -- 2.34.1

2 1

[PATCH openEuler-1.0-LTS 0/4] round lts patches
by Zhengchao Shao 23 Jun '24

23 Jun '24

Round lts patches. David Bauer (1): net l2tp: drop flow hash on forward Felix Fietkau (2): net: bridge: fix multicast-to-unicast with fraglist GSO net: bridge: fix corrupted ethernet header on multicast-to-unicast linke li (1): net: mark racy access on sk->sk_rcvbuf net/bridge/br_forward.c | 9 +++++++-- net/core/sock.c | 4 ++-- net/l2tp/l2tp_eth.c | 3 +++ 3 files changed, 12 insertions(+), 4 deletions(-) -- 2.34.1

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[openeuler:openEuler-1.0-LTS 21291/23028] drivers/spi/spi-phytium-plat.c:186:34: warning: unused variable 'phytium_spi_of_match'
by kernel test robot 23 Jun '24

23 Jun '24

Hi Malloy, FYI, the error/warning still remains. tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 10a294b680ddfda97a09883fe559dd418e5340cd commit: e8483fcd43fc1dbb8d21bb7eacce804cbab6a7c6 [21291/23028] spi: add phytium spi support config: x86_64-randconfig-005-20240420 (https://download.01.org/0day-ci/archive/20240623/202406230104.pOYbvQkT-lkp@…) compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240623/202406230104.pOYbvQkT-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/202406230104.pOYbvQkT-lkp@intel.com/ All warnings (new ones prefixed by >>): >> drivers/spi/spi-phytium-plat.c:186:34: warning: unused variable 'phytium_spi_of_match' [-Wunused-const-variable] 186 | static const struct of_device_id phytium_spi_of_match[] = { | ^~~~~~~~~~~~~~~~~~~~ 1 warning generated. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for SPI_PHYTIUM Depends on [n]: SPI [=y] && SPI_MASTER [=y] && (ARCH_PHYTIUM || COMPILE_TEST [=n]) Selected by [y]: - SPI_PHYTIUM_PLAT [=y] && SPI [=y] && SPI_MASTER [=y] vim +/phytium_spi_of_match +186 drivers/spi/spi-phytium-plat.c 185 > 186 static const struct of_device_id phytium_spi_of_match[] = { 187 { .compatible = "phytium,spi", .data = (void *)0 }, 188 { /* end of table */} 189 }; 190 MODULE_DEVICE_TABLE(of, phytium_spi_of_match); 191 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[openeuler:openEuler-1.0-LTS 18534/23028] drivers/acpi/cppc_acpi.c:614:3-8: WARNING: NULL check before some freeing functions is not needed.
by kernel test robot 22 Jun '24

22 Jun '24

tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 10a294b680ddfda97a09883fe559dd418e5340cd commit: b8815fbbe89b0d15fa3296c3e57d2197a92f5bc0 [18534/23028] ACPI: CPPC: Fix cppc_cpufreq_init failed in CPU Hotplug situation config: x86_64-randconfig-103-20240609 (https://download.01.org/0day-ci/archive/20240622/202406222234.Hz8OPmay-lkp@…) compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1) 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/202406222234.Hz8OPmay-lkp@intel.com/ cocci warnings: (new ones prefixed by >>) >> drivers/acpi/cppc_acpi.c:614:3-8: WARNING: NULL check before some freeing functions is not needed. vim +614 drivers/acpi/cppc_acpi.c 576 577 int acpi_get_psd_map(struct cppc_cpudata **all_cpu_data) 578 { 579 struct cpc_desc **cpc_pptr, *cpc_ptr; 580 int parsed_core_num = 0; 581 int i, ret; 582 583 cpc_pptr = kcalloc(num_possible_cpus(), sizeof(void *), GFP_KERNEL); 584 if (!cpc_pptr) 585 return -ENOMEM; 586 for_each_possible_cpu(i) { 587 cpc_pptr[i] = kzalloc(sizeof(struct cpc_desc), GFP_KERNEL); 588 if (!cpc_pptr[i]) { 589 ret = -ENOMEM; 590 goto out; 591 } 592 } 593 594 /* 595 * We can not use acpi_get_devices() to walk the processor devices 596 * because some processor device is not present. 597 */ 598 ret = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, 599 ACPI_UINT32_MAX, acpi_parse_cpc, NULL, 600 cpc_pptr, (void **)&parsed_core_num); 601 if (ret) 602 goto out; 603 if (parsed_core_num != num_possible_cpus()) { 604 ret = -EINVAL; 605 goto out; 606 } 607 608 ret = __acpi_get_psd_map(all_cpu_data, cpc_pptr); 609 610 out: 611 for_each_possible_cpu(i) { 612 cpc_ptr = cpc_pptr[i]; 613 if (cpc_ptr) > 614 kfree(cpc_ptr); 615 } 616 kfree(cpc_pptr); 617 618 return ret; 619 } 620 EXPORT_SYMBOL_GPL(acpi_get_psd_map); 621 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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