lib/test_kasan.c: add workqueue test case
Adds a test to verify workqueue stack recording and print it in
KASAN report.
The KASAN report was as follows(cleaned up slightly):
BUG: KASAN: use-after-free in kasan_workqueue_uaf
Freed by task 54:
kasan_save_stack+0x24/0x50
kasan_set_track+0x24/0x38
kasan_set_free_info+0x20/0x40
__kasan_slab_free+0x10c/0x170
kasan_slab_free+0x10/0x18
kfree+0x98/0x270
kasan_workqueue_work+0xc/0x18
Last potentially related work creation:
kasan_save_stack+0x24/0x50
kasan_record_wq_stack+0xa8/0xb8
insert_work+0x48/0x288
__queue_work+0x3e8/0xc40
queue_work_on+0xf4/0x118
kasan_workqueue_uaf+0xfc/0x190
Link: https://lkml.kernel.org/r/20201203022748.30681-1-walter-zh.wu@mediatek.com
Signed-off-by: Walter Wu <walter-zh.wu@mediatek.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: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Lai Jiangshan <jiangshanlai@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>
1 file changed