The patch titled
Subject: kasan: Fix a type conversion error
has been added to the -mm tree. Its filename is
kasan-fix-a-type-conversion-error.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/kasan-fix-a-type-conversion-error.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/kasan-fix-a-type-conversion-error.patch
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The -mm tree is included into linux-next and is updated
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------------------------------------------------------
From: Wang Long <long.wanglong@xxxxxxxxxx>
Subject: kasan: Fix a type conversion error
The current KASAN code can not find the following out-of-bounds bugs:
char *ptr;
ptr = kmalloc(8, GFP_KERNEL);
memset(ptr+7, 0, 2);
the cause of the problem is the type conversion error in
*memory_is_poisoned_n* function. So this patch fix that.
Signed-off-by: Wang Long <long.wanglong@xxxxxxxxxx>
Acked-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Vladimir Murzin <vladimir.murzin@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kasan/kasan.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/kasan/kasan.c~kasan-fix-a-type-conversion-error mm/kasan/kasan.c
--- a/mm/kasan/kasan.c~kasan-fix-a-type-conversion-error
+++ a/mm/kasan/kasan.c
@@ -220,7 +220,7 @@ static __always_inline bool memory_is_po
s8 *last_shadow = (s8 *)kasan_mem_to_shadow((void *)last_byte);
if (unlikely(ret != (unsigned long)last_shadow ||
- ((last_byte & KASAN_SHADOW_MASK) >= *last_shadow)))
+ ((long)(last_byte & KASAN_SHADOW_MASK) >= *last_shadow)))
return true;
}
return false;
_
Patches currently in -mm which might be from long.wanglong@xxxxxxxxxx are
lib-test_kasan-add-some-testcases.patch
kasan-fix-a-type-conversion-error.patch
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