From: Wang ShaoBo bobo.shaobowang@huawei.com

hulk inclusion category: bugfix bugzilla: 175666 CVE: NA ---------------------------

Checking return code of save_stack_trace_tsk_reliable() can be relaxed for safety validation when appling livepatch, so we ignore it's return code in klp_check_stack().

Signed-off-by: Wang ShaoBo bobo.shaobowang@huawei.com Reviewed-by: Jian Cheng cj.chengjian@huawei.com Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- arch/x86/kernel/livepatch.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/x86/kernel/livepatch.c b/arch/x86/kernel/livepatch.c index e927624d5016f..4d5599e443884 100644 --- a/arch/x86/kernel/livepatch.c +++ b/arch/x86/kernel/livepatch.c @@ -210,9 +210,8 @@ static int klp_check_stack(struct task_struct *task, ret = save_stack_trace_tsk_reliable(task, &trace); WARN_ON_ONCE(ret == -ENOSYS); if (ret) { - pr_info("%s: %s:%d has an unreliable stack\n", + pr_debug("%s: %s:%d has an unreliable stack\n", __func__, task->comm, task->pid); - return ret; }

klp_for_each_object(patch, obj) {