Commit 9550b105 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

slub: fix ksize() for zero-sized pointers

The slab and slob allocators already did this right, but slub would call
"get_object_page()" on the magic ZERO_SIZE_PTR, with all kinds of nasty
end results.

Noted by Ingo Molnar.

Cc: Ingo Molnar <>
Cc: Christoph Lameter <>
Cc: Andrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent a5c96d8a
......@@ -2394,7 +2394,7 @@ size_t ksize(const void *object)
struct page *page;
struct kmem_cache *s;
if (object == ZERO_SIZE_PTR)
if (ZERO_OR_NULL_PTR(object))
return 0;
page = get_object_page(object);
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