gfs2_meta: ->mount() can get NULL dev_name

get in sync with mount_bdev() handling of the same Reported-by: [email protected] Cc: [email protected] Signed-off-by: Al Viro <[email protected]>
berg · Oct 13, 2018 · 3df629d · 3df629d
1 parent 74dd7c9
commit 3df629d
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
@@ -1333,6 +1333,9 @@ static struct dentry *gfs2_mount_meta(struct file_system_type *fs_type,
 	struct path path;
 	int error;
 
+	if (!dev_name || !*dev_name)
+		return ERR_PTR(-EINVAL);
+
 	error = kern_path(dev_name, LOOKUP_FOLLOW, &path);
 	if (error) {
 		pr_warn("path_lookup on %s returned error %d\n",