The patch titled
Subject: kasan: adjust kasan_stack_oob for tag-based mode
has been added to the -mm tree. Its filename is
kasan-adjust-kasan_stack_oob-for-tag-based-mode.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kasan-adjust-kasan_stack_oob-for-tag-based-mode.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kasan-adjust-kasan_stack_oob-for-tag-based-mode.patch
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------------------------------------------------------
From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Subject: kasan: adjust kasan_stack_oob for tag-based mode
Use OOB_TAG_OFF as access offset to land the access into the next granule.
Link: http://lkml.kernel.org/r/403b259f1de49a7a3694531c851ac28326a586a8.1596199677.git.andreyknvl@xxxxxxxxxx
Signed-off-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Suggested-by: Walter Wu <walter-zh.wu@xxxxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Elena Petrova <lenaptr@xxxxxxxxxx>
Cc: Marco Elver <elver@xxxxxxxxxx>
Cc: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/test_kasan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/lib/test_kasan.c~kasan-adjust-kasan_stack_oob-for-tag-based-mode
+++ a/lib/test_kasan.c
@@ -488,7 +488,7 @@ static noinline void __init kasan_global
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");
_
Patches currently in -mm which might be from andreyknvl@xxxxxxxxxx are
kasan-dont-tag-stacks-allocated-with-pagealloc.patch
kasan-arm64-dont-instrument-functions-that-enable-kasan.patch
kasan-allow-enabling-stack-tagging-for-tag-based-mode.patch
kasan-adjust-kasan_stack_oob-for-tag-based-mode.patch
