Index: vfs_mount.c
===================================================================
RCS file: /data/ncvs/src/sys/kern/vfs_mount.c,v
retrieving revision 1.115
diff -u -r1.115 vfs_mount.c
--- vfs_mount.c	14 Nov 2003 05:27:41 -0000	1.115
+++ vfs_mount.c	18 Nov 2003 17:20:04 -0000
@@ -283,8 +283,8 @@
 		if (auio->uio_segflg == UIO_SYSSPACE) {
 			bcopy(auio->uio_iov[i].iov_base, opt->name, namelen);
 		} else {
-			error = copyin(auio->uio_iov[i].iov_base, opt->name,
-			    namelen);
+			error = copyinstr(auio->uio_iov[i].iov_base, opt->name,
+			    namelen, NULL);
 			if (error)
 				goto bad;
 		}