ext4: avoid buffer leak in ext4_orphan_add() after prior errors

commit feaf264ce7f8d54582e2f66eb82dd9dd124c94f3 upstream.

Fixes: d745a8c20c1f ("ext4: reduce contention on s_orphan_lock")
Fixes: 6e3617e579e0 ("ext4: Handle non empty on-disk orphan link")
Cc: Dmitry Monakhov <dmonakhov@gmail.com>
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org # 2.6.34
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index eb0d8ee39827a83dca3c1fec3d9def1947f1a7ee..cfa0dc2d97cd48a224ee041e9c87e9433108129c 100644 (file)
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2820,7 +2820,9 @@ int ext4_orphan_add(handle_t *handle, struct inode *inode)
                        list_del_init(&EXT4_I(inode)->i_orphan);
                        mutex_unlock(&sbi->s_orphan_lock);
                }
-       }
+       } else
+               brelse(iloc.bh);
+
        jbd_debug(4, "superblock will point to %lu\n", inode->i_ino);
        jbd_debug(4, "orphan inode %lu will point to %d\n",
                        inode->i_ino, NEXT_ORPHAN(inode));