ceph: fix leak of monc mutex

Fix leak of monc mutex on ENOMEM or bad fsid when receiving new mon map.
Audited all other users.

Signed-off-by: Sage Weil <sage@newdream.net>

diff --git a/fs/ceph/mon_client.c b/fs/ceph/mon_client.c
index 1dd0dc2..a76da5e 100644 (file)
--- a/fs/ceph/mon_client.c
+++ b/fs/ceph/mon_client.c
@@ -320,17 +320,18 @@ static void ceph_monc_handle_map(struct ceph_mon_client *monc,
        if (IS_ERR(monmap)) {
                pr_err("problem decoding monmap, %d\n",
                       (int)PTR_ERR(monmap));
-               return;
+               goto out;
        }
 
        if (ceph_check_fsid(monc->client, &monmap->fsid) < 0) {
                kfree(monmap);
-               return;
+               goto out;
        }
 
        client->monc.monmap = monmap;
        kfree(old);
 
+out:
        mutex_unlock(&monc->mutex);
        wake_up(&client->mount_wq);
 }