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mm, kasan: don't call kasan_krealloc() from ksize().

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Instead of calling kasan_krealloc(), which replaces the memory
allocation stack ID (if stack depot is used), just unpoison the whole
memory chunk.

Signed-off-by: Alexander Potapenko <[email protected]>
Acked-by: Andrey Ryabinin <[email protected]>
Cc: Andrey Konovalov <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Konstantin Serebryany <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Alexander Potapenko 2016-05-20 16:59:14 -07:00 • committed by Linus Torvalds
commit 4ebb31a42f
2 changed files with 4 additions and 3 deletions
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2
mm/slab.c
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@ -4501,7 +4501,7 @@ size_t ksize(const void *objp)
/* We assume that ksize callers could use the whole allocated area,
* so we need to unpoison this area.
*/
kasan_krealloc(objp, size, GFP_NOWAIT);
kasan_unpoison_shadow(objp, size);
return size;
}