Minor kernel changes.

2017-02-09 09:53:00 -05:00
parent 0f0c5fcfc7
commit 15abe49f09
3 changed files with 31 additions and 0 deletions
--- a/kern/vfs/vfslookup.c
+++ b/kern/vfs/vfslookup.c
@@ -135,6 +135,13 @@ getdevice(char *path, char **subpath, struct vnode **startvn)

 	KASSERT(vfs_biglock_do_i_hold());

+	/*
+	 * Entirely empty filenames aren't legal.
+	 */
+	if (path[0] == 0) {
+		return EINVAL;
+	}
+
 	/*
 	 * Locate the first colon or slash.
 	 */