5.1-stable patches

[thirdparty/kernel/stable-queue.git] / releases / 2.6.31.12 / fix-more-leaks-in-audit_tree.c-tag_chunk.patch

From b4c30aad39805902cf5b855aa8a8b22d728ad057 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@ZenIV.linux.org.uk>
Date: Sat, 19 Dec 2009 16:03:30 +0000
Subject: fix more leaks in audit_tree.c tag_chunk()

From: Al Viro <viro@ZenIV.linux.org.uk>

commit b4c30aad39805902cf5b855aa8a8b22d728ad057 upstream.

Several leaks in audit_tree didn't get caught by commit
318b6d3d7ddbcad3d6867e630711b8a705d873d7, including the leak on normal
exit in case of multiple rules refering to the same chunk.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 kernel/audit_tree.c |    9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

--- a/kernel/audit_tree.c
+++ b/kernel/audit_tree.c
@@ -373,15 +373,17 @@ static int tag_chunk(struct inode *inode
 	for (n = 0; n < old->count; n++) {
 		if (old->owners[n].owner == tree) {
 			spin_unlock(&hash_lock);
-			put_inotify_watch(watch);
+			put_inotify_watch(&old->watch);
 			return 0;
 		}
 	}
 	spin_unlock(&hash_lock);
 
 	chunk = alloc_chunk(old->count + 1);
-	if (!chunk)
+	if (!chunk) {
+		put_inotify_watch(&old->watch);
 		return -ENOMEM;
+	}
 
 	mutex_lock(&inode->inotify_mutex);
 	if (inotify_clone_watch(&old->watch, &chunk->watch) < 0) {
@@ -425,7 +427,8 @@ static int tag_chunk(struct inode *inode
 	spin_unlock(&hash_lock);
 	inotify_evict_watch(&old->watch);
 	mutex_unlock(&inode->inotify_mutex);
-	put_inotify_watch(&old->watch);
+	put_inotify_watch(&old->watch); /* pair to inotify_find_watch */
+	put_inotify_watch(&old->watch); /* and kill it */
 	return 0;
 }