1 files changed, 5 insertions, 0 deletions

diff --git a/fs/gfs2/locking/dlm/mount.c b/fs/gfs2/locking/dlm/mount.c
index 41c5b04caaba..f2efff424224 100644
--- a/fs/gfs2/locking/dlm/mount.c
+++ b/fs/gfs2/locking/dlm/mount.c
@@ -67,6 +67,11 @@ static int make_args(struct gdlm_ls *ls, char *data_arg, int *nodir)
         memset(data, 0, 256);
         strncpy(data, data_arg, 255);
 
+        if (!strlen(data)) {
+                log_error("no mount options, (u)mount helpers not installed");
+                return -EINVAL;
+        }
+
         for (options = data; (x = strsep(&options, ":")); ) {
                 if (!*x)
                         continue;