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authorAndrey Konovalov <andreyknvl@google.com>2020-08-06 23:25:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-07 11:33:28 -0700
commit51dcc81c282dc401dfd8460a7e59546bc1b30e32 (patch)
tree6bb00c4e1d7d7b7069c7eee6a14a20efd7de8ec5 /lib/test_kasan.c
parentcae9dc35ed9ff82a99754e51d57ff6c332e1f7e4 (diff)
downloadlwn-51dcc81c282dc401dfd8460a7e59546bc1b30e32.tar.gz
lwn-51dcc81c282dc401dfd8460a7e59546bc1b30e32.zip
kasan: adjust kasan_stack_oob for tag-based mode
Use OOB_TAG_OFF as access offset to land the access into the next granule. Suggested-by: Walter Wu <walter-zh.wu@mediatek.com> Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Elena Petrova <lenaptr@google.com> Cc: Marco Elver <elver@google.com> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: Ard Biesheuvel <ardb@kernel.org> Link: http://lkml.kernel.org/r/403b259f1de49a7a3694531c851ac28326a586a8.1596199677.git.andreyknvl@google.com Link: http://lkml.kernel.org/r/3063ab1411e92bce36061a96e25b651212e70ba6.1596544734.git.andreyknvl@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/test_kasan.c')
-rw-r--r--lib/test_kasan.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/test_kasan.c b/lib/test_kasan.c
index f362f2662938..53e953bb1d1d 100644
--- a/lib/test_kasan.c
+++ b/lib/test_kasan.c
@@ -488,7 +488,7 @@ static noinline void __init kasan_global_oob(void)
static noinline void __init kasan_stack_oob(void)
{
char stack_array[10];
- volatile int i = 0;
+ volatile int i = OOB_TAG_OFF;
char *p = &stack_array[ARRAY_SIZE(stack_array) + i];
pr_info("out-of-bounds on stack\n");