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[PATCH OLK-5.10] start_kernel: Add __no_stack_protector function attribute
by Lin Yujun 09 Dec '25

09 Dec '25

From: "ndesaulniers(a)google.com" <ndesaulniers(a)google.com> mainline inclusion from mainline-v6.5-rc1 commit 514ca14ed5444b911de59ed3381dfd195d99fe4b category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/ID0RFA CVE: CVE-2023-53491 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?… -------------------------------- Back during the discussion of commit a9a3ed1eff36 ("x86: Fix early boot crash on gcc-10, third try") we discussed the need for a function attribute to control the omission of stack protectors on a per-function basis; at the time Clang had support for no_stack_protector but GCC did not. This was fixed in gcc-11. Now that the function attribute is available, let's start using it. Callers of boot_init_stack_canary need to use this function attribute unless they're compiled with -fno-stack-protector, otherwise the canary stored in the stack slot of the caller will differ upon the call to boot_init_stack_canary. This will lead to a call to __stack_chk_fail() then panic. Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94722 Link: https://lore.kernel.org/all/20200316130414.GC12561@hirez.programming.kicks-… Tested-by: Nathan Chancellor <nathan(a)kernel.org> Acked-by: Michael Ellerman <mpe(a)ellerman.id.au> (powerpc) Acked-by: Miguel Ojeda <ojeda(a)kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz(a)infradead.org> Signed-off-by: Nick Desaulniers <ndesaulniers(a)google.com> Link: https://lore.kernel.org/r/20230412-no_stackp-v2-1-116f9fe4bbe7@google.com Signed-off-by: Josh Poimboeuf <jpoimboe(a)kernel.org> Signed-off-by: ndesaulniers(a)google.com <ndesaulniers(a)google.com> Conflicts: arch/powerpc/kernel/smp.c include/linux/compiler_attributes.h init/main.c [fix context conflicts] Signed-off-by: Lin Yujun <linyujun809(a)h-partners.com> --- arch/powerpc/kernel/smp.c | 1 + include/linux/compiler_attributes.h | 12 ++++++++++++ init/main.c | 3 ++- 3 files changed, 15 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index b12e4437bf0a..f3fea3928efc 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -1467,10 +1467,11 @@ static void add_cpu_to_masks(int cpu) free_cpumask_var(mask); } /* Activate a secondary processor. */ +__no_stack_protector void start_secondary(void *unused) { unsigned int cpu = raw_smp_processor_id(); mmgrab(&init_mm); diff --git a/include/linux/compiler_attributes.h b/include/linux/compiler_attributes.h index 08eb06301791..6f495fca9d79 100644 --- a/include/linux/compiler_attributes.h +++ b/include/linux/compiler_attributes.h @@ -249,10 +249,22 @@ * clang: https://clang.llvm.org/docs/AttributeReference.html#noreturn * clang: https://clang.llvm.org/docs/AttributeReference.html#id1 */ #define __noreturn __attribute__((__noreturn__)) +/* + * Optional: only supported since GCC >= 11.1, clang >= 7.0. + * + * gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html#index-no… + * clang: https://clang.llvm.org/docs/AttributeReference.html#no-stack-protector-safe… + */ +#if __has_attribute(__no_stack_protector__) +# define __no_stack_protector __attribute__((__no_stack_protector__)) +#else +# define __no_stack_protector +#endif + /* * gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Type-Attributes.html#index-packed… * clang: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-pa… */ #define __packed __attribute__((__packed__)) diff --git a/init/main.c b/init/main.c index 2b466bd04110..5d73bd096bd0 100644 --- a/init/main.c +++ b/init/main.c @@ -872,11 +872,12 @@ early_param("randomize_kstack_offset", early_randomize_kstack_offset); void __init __weak arch_call_rest_init(void) { rest_init(); } -asmlinkage __visible void __init __no_sanitize_address start_kernel(void) +asmlinkage __visible __init __no_sanitize_address __noreturn __no_stack_protector +void start_kernel(void) { char *command_line; char *after_dashes; set_task_stack_end_magic(&init_task); -- 2.34.1

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[PATCH OLK-6.6 00/14] Fix incorrect use of cpuhp_remove_multi_state parameter
by Yushan Wang 09 Dec '25

09 Dec '25

driver inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IDBQ74 ---------------------------------------------------------------------- Yifan Wu (3): soc_cache: Fix incorrect use of cpuhp_remove_multi_state parameter soc_cache: Fix error code returning from hisi_soc_l3c_do_lock soc_cache: Fix component removal order to avoid race condition Yushan Wang (10): soc cache: cleanup: replace dynamically allocated param with local variable soc cache: cleanup: fix memory leakage on error path soc cache: cleanup: move judgement of soc cache dev into lock protection soc cache: cleanup: avoid tag addr from interfering range validation soc cache: cleanup: Change type of mnt_type soc cache: cleanup: Remove the redundant check of vm_pgoff soc cache: Check address while walking pages soc cache: fix walk page parameter and drop incorrect check soc cache: Drop redundant vm_pgoff soc cache: Don't poll before removing all locks .../soc/hisilicon/hisi_soc_cache_framework.c | 65 ++++++++----------- drivers/soc/hisilicon/hisi_soc_l3c.c | 13 ++-- 2 files changed, 31 insertions(+), 47 deletions(-) -- 2.33.0

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[PATCH 00/14] Fix incorrect use of cpuhp_remove_multi_state parameter
by Yushan Wang 09 Dec '25

09 Dec '25

driver inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IDBQ74 ---------------------------------------------------------------------- Yifan Wu (3): soc_cache: Fix incorrect use of cpuhp_remove_multi_state parameter soc_cache: Fix error code returning from hisi_soc_l3c_do_lock soc_cache: Fix component removal order to avoid race condition Yushan Wang (10): soc cache: cleanup: replace dynamically allocated param with local variable soc cache: cleanup: fix memory leakage on error path soc cache: cleanup: move judgement of soc cache dev into lock protection soc cache: cleanup: avoid tag addr from interfering range validation soc cache: cleanup: Change type of mnt_type soc cache: cleanup: Remove the redundant check of vm_pgoff soc cache: Check address while walking pages soc cache: fix walk page parameter and drop incorrect check soc cache: Drop redundant vm_pgoff soc cache: Don't poll before removing all locks .../soc/hisilicon/hisi_soc_cache_framework.c | 65 ++++++++----------- drivers/soc/hisilicon/hisi_soc_l3c.c | 13 ++-- 2 files changed, 31 insertions(+), 47 deletions(-) -- 2.33.0

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[PATCH OLK-6.6 0/3] Some bugfixes for interference
by Tengda Wu 09 Dec '25

09 Dec '25

This small patch series addresses some interference issues. Tengda Wu (3): interference: Add fallback to sched_clock when TSC is unavailable interference: Fix missing interference.stat file in v1 hierarchy interference: add version compatibility check between subsystem and cgroup include/linux/cgroup.h | 25 ++++++++++++++------- kernel/cgroup/ifs.c | 51 +++++++++++++++++++++++++++++------------- 2 files changed, 53 insertions(+), 23 deletions(-) -- 2.34.1

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[PATCH OLK-5.10 0/2] CVE-2023-53491 v3
by Lin Yujun 09 Dec '25

09 Dec '25

Lin Yujun (1): start_kernel: use unreachable too fix __noreturn build warning ndesaulniers(a)google.com (1): start_kernel: Add __no_stack_protector function attribute arch/powerpc/kernel/smp.c | 1 + include/linux/compiler_attributes.h | 12 ++++++++++++ init/main.c | 4 +++- 3 files changed, 16 insertions(+), 1 deletion(-) -- 2.34.1

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[PATCH OLK-5.10 0/2] CVE-2023-53491 v2
by Lin Yujun 09 Dec '25

09 Dec '25

Lin Yujun (1): start_kernel: use unreachable too fix __noreturn build warning ndesaulniers(a)google.com (1): start_kernel: Add __no_stack_protector function attribute arch/powerpc/kernel/smp.c | 1 + include/linux/compiler_attributes.h | 12 ++++++++++++ init/main.c | 4 +++- 3 files changed, 16 insertions(+), 1 deletion(-) -- 2.34.1

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[openeuler:OLK-6.6 3493/3493] mm/dynamic_pool.c:1577:25: sparse: sparse: symbol 'pagelist_dpool_ops' was not declared. Should it be static?
by kernel test robot 09 Dec '25

09 Dec '25

tree: https://gitee.com/openeuler/kernel.git OLK-6.6 head: 0189df7df2ef7f7dbbabf7ff8398e45adf306e24 commit: cf98ffbc116bc49dc4506c68e20b02e26519ad35 [3493/3493] mm/dynamic_pool: fill dpool with pagelist config: x86_64-randconfig-r122-20251209 (https://download.01.org/0day-ci/archive/20251209/202512091544.YzqAeHFm-lkp@…) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251209/202512091544.YzqAeHFm-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/202512091544.YzqAeHFm-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) mm/dynamic_pool.c:999:55: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct cgroup_subsys_state *css @@ got struct cgroup_subsys_state [noderef] __rcu * @@ mm/dynamic_pool.c:999:55: sparse: expected struct cgroup_subsys_state *css mm/dynamic_pool.c:999:55: sparse: got struct cgroup_subsys_state [noderef] __rcu * >> mm/dynamic_pool.c:1577:25: sparse: sparse: symbol 'pagelist_dpool_ops' was not declared. Should it be static? vim +/pagelist_dpool_ops +1577 mm/dynamic_pool.c 1576 > 1577 struct dynamic_pool_ops pagelist_dpool_ops = { 1578 .fill_pool = dpool_fill_from_pagelist, 1579 .drain_pool = dpool_drain_to_pagelist, 1580 .restore_pool = dpool_migrate_used_pages, 1581 }; 1582 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

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[PATCH OLK-5.10] net/oenetcls: Prioritize oenetcls hooks over rps
by Yue Haibing 09 Dec '25

09 Dec '25

hulk inclusion category: cleanup bugzilla: https://gitee.com/openeuler/kernel/issues/ICBFCS -------------------------------- Prioritize oenetcls hooks over rps, clean up unnecessary oecls_rps goto statements. Signed-off-by: Yue Haibing <yuehaibing(a)huawei.com> --- net/core/dev.c | 29 +++++++++-------------------- 1 file changed, 9 insertions(+), 20 deletions(-) diff --git a/net/core/dev.c b/net/core/dev.c index df6c0ac02a5e..372bab73b8bf 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -5890,11 +5890,15 @@ static int netif_receive_skb_internal(struct sk_buff *skb) return NET_RX_SUCCESS; rcu_read_lock(); -#ifdef CONFIG_RPS #if IS_ENABLED(CONFIG_OENETCLS) - if (static_branch_unlikely(&oecls_rps_needed)) - goto oecls_rps; + if (static_branch_unlikely(&oecls_rps_needed)) { + if (oenetcls_skb_set_cpu(skb, enqueue_to_backlog, &ret)) { + rcu_read_unlock(); + return ret; + } + } #endif +#ifdef CONFIG_RPS if (static_branch_unlikely(&rps_needed)) { struct rps_dev_flow voidflow, *rflow = &voidflow; int cpu = get_rps_cpu(skb->dev, skb, &rflow); @@ -5906,15 +5910,6 @@ static int netif_receive_skb_internal(struct sk_buff *skb) } } #endif - -#if IS_ENABLED(CONFIG_OENETCLS) -oecls_rps: - if (oenetcls_skb_set_cpu(skb, enqueue_to_backlog, &ret)) { - rcu_read_unlock(); - return ret; - } -#endif - ret = __netif_receive_skb(skb); rcu_read_unlock(); return ret; @@ -5935,11 +5930,11 @@ static void netif_receive_skb_list_internal(struct list_head *head) list_splice_init(&sublist, head); rcu_read_lock(); -#ifdef CONFIG_RPS #if IS_ENABLED(CONFIG_OENETCLS) if (static_branch_unlikely(&oecls_rps_needed)) - goto oecls_rps_list; + oenetcls_skblist_set_cpu(head, enqueue_to_backlog); #endif +#ifdef CONFIG_RPS if (static_branch_unlikely(&rps_needed)) { list_for_each_entry_safe(skb, next, head, list) { struct rps_dev_flow voidflow, *rflow = &voidflow; @@ -5953,12 +5948,6 @@ static void netif_receive_skb_list_internal(struct list_head *head) } } #endif - -#if IS_ENABLED(CONFIG_OENETCLS) -oecls_rps_list: - oenetcls_skblist_set_cpu(head, enqueue_to_backlog); -#endif - __netif_receive_skb_list(head); rcu_read_unlock(); } -- 2.34.1

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[PATCH OLK-5.10 0/2] CVE-2023-53491
by Lin Yujun 09 Dec '25

09 Dec '25

Lin Yujun (1): start_kernel: use unreachable too fix __noreturn build warning ndesaulniers(a)google.com (1): start_kernel: Add __no_stack_protector function attribute arch/powerpc/kernel/smp.c | 1 + include/linux/compiler_attributes.h | 12 ++++++++++++ init/main.c | 4 +++- 3 files changed, 16 insertions(+), 1 deletion(-) -- 2.34.1

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[PATCH OLK-6.6 0/2] Bugfix for two issues
by Liu Mingrui 09 Dec '25

09 Dec '25

Bugfix for the following two issues Liu Mingrui (2): zcopy: Fix NULL pointer dereference while attach conflict with free zcopy: Fix softlockup while attach PUD-SIZE page drivers/misc/zcopy/zcopy.c | 5 +++++ 1 file changed, 5 insertions(+) -- 2.25.1

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