diff options
| author | Christoph Lameter | 2012-09-04 23:06:14 +0000 |
|---|---|---|
| committer | Pekka Enberg | 2012-09-05 12:00:35 +0300 |
| commit | 79576102afc24fcc6627d7a15691e432d9a2eacb (patch) | |
| tree | df44371aad955bc889f8d72b32b754ac1592ed60 /mm | |
| parent | e21827aadd77e33833eeb393de2e8675e9b399e2 (diff) | |
mm/slub: Add debugging to verify correct cache use on kmem_cache_free()
Add additional debugging to check that the objects is actually from the cache
the caller claims. Doing so currently trips up some other debugging code. It
takes a lot to infer from that what was happening.
Reviewed-by: Glauber Costa <glommer@parallels.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
[ penberg@kernel.org: Use pr_err() ]
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/slub.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/slub.c b/mm/slub.c index c67bd0a4a952..990592174340 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -2614,6 +2614,13 @@ void kmem_cache_free(struct kmem_cache *s, void *x) page = virt_to_head_page(x); + if (kmem_cache_debug(s) && page->slab != s) { + pr_err("kmem_cache_free: Wrong slab cache. %s but object" + " is from %s\n", page->slab->name, s->name); + WARN_ON_ONCE(1); + return; + } + slab_free(s, page, x, _RET_IP_); trace_kmem_cache_free(_RET_IP_, x); |