diff options
| author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-19 13:21:34 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-19 13:21:34 -0700 |
| commit | 9550b105b8646f916862aee3ab7b25020ca14159 (patch) | |
| tree | d5e57db2bfd773611e2b77b4bbe6d89ba8449b45 /mm/slub.c | |
| parent | a5c96d8a1c67f31ef48935a78da2d2076513842b (diff) | |
| download | lwn-9550b105b8646f916862aee3ab7b25020ca14159.tar.gz lwn-9550b105b8646f916862aee3ab7b25020ca14159.zip | |
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 <mingo@elte.hu>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/slub.c')
| -rw-r--r-- | mm/slub.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/slub.c b/mm/slub.c index 52a4f44be394..322f3a5d72c7 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -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); |