From 970931b5cb0f9b9f4f18421345adf7bc7c371be9 Mon Sep 17 00:00:00 2001
From: Kirk McKusick <mckusick@ucbvax.Berkeley.EDU>
Date: Fri, 16 Jun 1995 04:47:22 -0800
Subject: [PATCH] null pointer bug (from ralph)

SCCS-vsn: sys/kern/vfs_vnops.c 8.14
---
 usr/src/sys/kern/vfs_vnops.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/usr/src/sys/kern/vfs_vnops.c b/usr/src/sys/kern/vfs_vnops.c
index 51d3994b50..280aaa6ae4 100644
--- a/usr/src/sys/kern/vfs_vnops.c
+++ b/usr/src/sys/kern/vfs_vnops.c
@@ -9,7 +9,7 @@
  *
  * %sccs.include.redist.c%
  *
- *	@(#)vfs_vnops.c	8.13 (Berkeley) %G%
+ *	@(#)vfs_vnops.c	8.14 (Berkeley) %G%
  */
 
 #include <sys/param.h>
@@ -243,7 +243,8 @@ vn_write(fp, uio, cred)
 		ioflag |= IO_APPEND;
 	if (fp->f_flag & FNONBLOCK)
 		ioflag |= IO_NDELAY;
-	if ((fp->f_flag & O_FSYNC) || (vp->v_mount->mnt_flag & MNT_SYNCHRONOUS))
+	if ((fp->f_flag & O_FSYNC) ||
+	    (vp->v_mount && (vp->v_mount->mnt_flag & MNT_SYNCHRONOUS)))
 		ioflag |= IO_SYNC;
 	VOP_LEASE(vp, p, cred, LEASE_WRITE);
 	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
-- 
2.20.1