1 files changed, 10 insertions, 0 deletions

diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 9c85cdb353aa..f3a95df4b95f 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1338,6 +1338,16 @@ static int nfs_walk_authlist(struct nfs_parsed_mount_data *args,
         unsigned int i, j, server_authlist_len = *(request->auth_flav_len);
 
         /*
+         * Certain releases of Linux's mountd return an empty
+         * flavor list.  To prevent behavioral regression with
+         * these servers (ie. rejecting mounts that used to
+         * succeed), revert to pre-2.6.32 behavior (no checking)
+         * if the returned flavor list is empty.
+         */
+        if (server_authlist_len == 0)
+                return 0;
+
+        /*
          * We avoid sophisticated negotiating here, as there are
          * plenty of cases where we can get it wrong, providing
          * either too little or too much security.