nfs: nfs4clinet: check the return value of kstrdup()

kstrdup() returns NULL when some internal memory errors happen, it is
better to check the return value of it so to catch the memory error in
time.

Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index d8b5a25..47a6cf8 100644 (file)
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -1343,8 +1343,11 @@ int nfs4_update_server(struct nfs_server *server, const char *hostname,
        }
        nfs_put_client(clp);
 
-       if (server->nfs_client->cl_hostname == NULL)
+       if (server->nfs_client->cl_hostname == NULL) {
                server->nfs_client->cl_hostname = kstrdup(hostname, GFP_KERNEL);
+               if (server->nfs_client->cl_hostname == NULL)
+                       return -ENOMEM;
+       }
        nfs_server_insert_lists(server);
 
        return nfs_probe_server(server, NFS_FH(d_inode(server->super->s_root)));