[PATCH] SELinux: atomic_dec_and_test() bug

Atomic underflow debugging in this kernel exposed a bug in the AVC RCU
code, fix below.  The effect of this bug would be delayed node reclamation.
Signed-off-by: James Morris <jmorris@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

security/selinux/avc.c

@@ -281,7 +281,7 @@ static inline int avc_reclaim_node(void)
 			continue;
 
 		list_for_each_entry(node, &avc_cache.slots[hvalue], list) {
-			if (!atomic_dec_and_test(&node->ae.used)) {
+			if (atomic_dec_and_test(&node->ae.used)) {
 				/* Recently Unused */
 				avc_node_delete(node);
 				ecx++;