ceph: handle kzalloc() failure

Signed-off-by: Cheng Renquan <crquan@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index ccb4141e306..d549ab3adfd 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -2631,6 +2631,9 @@ int ceph_mdsc_init(struct ceph_mds_client *mdsc, struct ceph_client *client)
         mdsc->client = client;
         mutex_init(&mdsc->mutex);
         mdsc->mdsmap = kzalloc(sizeof(*mdsc->mdsmap), GFP_NOFS);
+        if (mdsc->mdsmap == NULL)
+                return -ENOMEM;
+
         init_completion(&mdsc->safe_umount_waiters);
         init_completion(&mdsc->session_close_waiters);
         INIT_LIST_HEAD(&mdsc->waiting_for_map);
@@ -2656,6 +2659,7 @@ int ceph_mdsc_init(struct ceph_mds_client *mdsc, struct ceph_client *client)
         init_waitqueue_head(&mdsc->cap_flushing_wq);
         spin_lock_init(&mdsc->dentry_lru_lock);
         INIT_LIST_HEAD(&mdsc->dentry_lru);
+
         return 0;
 }