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authorWalter Wu <walter-zh.wu@mediatek.com>2020-12-14 19:09:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2020-12-15 12:13:42 -0800
commitef13346123fa7bef3cf62e9bf1efe9d7b274fa20 (patch)
tree576f86408cadfa17777dae597d9c36e3de06a30a /mm/kasan
parente89a85d63fb2e187f5afcbf83c12743132596563 (diff)
downloadlinux-ef13346123fa7bef3cf62e9bf1efe9d7b274fa20.tar.bz2
kasan: print workqueue stack
The aux_stack[2] is reused to record the call_rcu() call stack and enqueuing work call stacks. So that we need to change the auxiliary stack title for common title, print them in KASAN report. Link: https://lkml.kernel.org/r/20201203022715.30635-1-walter-zh.wu@mediatek.com Signed-off-by: Walter Wu <walter-zh.wu@mediatek.com> Suggested-by: Marco Elver <elver@google.com> Acked-by: Marco Elver <elver@google.com> Reviewed-by: Dmitry Vyukov <dvyukov@google.com> Reviewed-by: Andrey Konovalov <andreyknvl@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Alexander Potapenko <glider@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Lai Jiangshan <jiangshanlai@gmail.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/kasan')
-rw-r--r--mm/kasan/generic.c3
-rw-r--r--mm/kasan/report.c4
2 files changed, 2 insertions, 5 deletions
diff --git a/mm/kasan/generic.c b/mm/kasan/generic.c
index 248264b9cb76..30c0a5038b5c 100644
--- a/mm/kasan/generic.c
+++ b/mm/kasan/generic.c
@@ -339,9 +339,6 @@ void kasan_record_aux_stack(void *addr)
object = nearest_obj(cache, page, addr);
alloc_info = get_alloc_info(cache, object);
- /*
- * record the last two call_rcu() call stacks.
- */
alloc_info->aux_stack[1] = alloc_info->aux_stack[0];
alloc_info->aux_stack[0] = kasan_save_stack(GFP_NOWAIT);
}
diff --git a/mm/kasan/report.c b/mm/kasan/report.c
index 00a53f1355ae..5a0102f37171 100644
--- a/mm/kasan/report.c
+++ b/mm/kasan/report.c
@@ -185,12 +185,12 @@ static void describe_object(struct kmem_cache *cache, void *object,
#ifdef CONFIG_KASAN_GENERIC
if (alloc_info->aux_stack[0]) {
- pr_err("Last call_rcu():\n");
+ pr_err("Last potentially related work creation:\n");
print_stack(alloc_info->aux_stack[0]);
pr_err("\n");
}
if (alloc_info->aux_stack[1]) {
- pr_err("Second to last call_rcu():\n");
+ pr_err("Second to last potentially related work creation:\n");
print_stack(alloc_info->aux_stack[1]);
pr_err("\n");
}