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authorAlexander Potapenko <glider@google.com>2016-05-20 16:59:14 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-05-20 17:58:30 -0700
commit4ebb31a42ffa03912447fe1aabbdb28242f909ba (patch)
tree2c73f495865653dc8b6ab369194d1b06f193822f
parent55834c59098d0c5a97b0f3247e55832b67facdcf (diff)
mm, kasan: don't call kasan_krealloc() from ksize().
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 <glider@google.com> Acked-by: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andrey Konovalov <adech.fo@gmail.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Christoph Lameter <cl@linux.com> Cc: Konstantin Serebryany <kcc@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/slab.c2
-rw-r--r--mm/slub.c5
2 files changed, 4 insertions, 3 deletions
diff --git a/mm/slab.c b/mm/slab.c
index 28864c022430..cc8bbc1e6bc9 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -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;
}
diff --git a/mm/slub.c b/mm/slub.c
index cf1faa4d3992..825ff4505336 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3635,8 +3635,9 @@ size_t ksize(const void *object)
{
size_t size = __ksize(object);
/* We assume that ksize callers could use whole allocated area,
- so we need unpoison this area. */
- kasan_krealloc(object, size, GFP_NOWAIT);
+ * so we need to unpoison this area.
+ */
+ kasan_unpoison_shadow(object, size);
return size;
}
EXPORT_SYMBOL(ksize);