Slab: Fix memory leak in fallback_alloc()

The zonelist patches caused the loop that checks for available
objects in permitted zones to not terminate immediately. One object
per zone per allocation may be allocated and then abandoned.

Break the loop when we have successfully allocated one object.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/mm/slab.c b/mm/slab.c
index 06236e4ddc1b..046607f05f3e 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3263,9 +3263,12 @@ retry:
 
                 if (cpuset_zone_allowed_hardwall(zone, flags) &&
                         cache->nodelists[nid] &&
-                        cache->nodelists[nid]->free_objects)
+                        cache->nodelists[nid]->free_objects) {
                                 obj = ____cache_alloc_node(cache,
                                         flags | GFP_THISNODE, nid);
+                                if (obj)
+                                        break;
+                }
         }
 
         if (!obj) {