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[v2,5/5] kasan: adjust kasan_stack_oob for tag-based mode

Message ID 3063ab1411e92bce36061a96e25b651212e70ba6.1596544734.git.andreyknvl@google.com (mailing list archive)
State New, archived
Headers show
Series kasan: support stack instrumentation for tag-based mode | expand

Commit Message

Andrey Konovalov Aug. 4, 2020, 12:41 p.m. UTC 
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>
---
 lib/test_kasan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/lib/test_kasan.c b/lib/test_kasan.c
index 7674616d0c37..5d3f496893ef 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");