From 45cdcb7aab7d30e03016d22b9bab448ad3cf3058 Mon Sep 17 00:00:00 2001
From: Mike Pritchard <mpp@FreeBSD.org>
Date: Fri, 2 Mar 2007 00:10:11 +0000
Subject: [PATCH] Change fifo_printinfo to check if the vnode v_fifoinfo
 pointer is NULL and print a message to that effect to prevent a panic.

---
 sys/fs/fifofs/fifo_vnops.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys/fs/fifofs/fifo_vnops.c b/sys/fs/fifofs/fifo_vnops.c
index 6947c472a64d..9d9ee62cfa03 100644
--- a/sys/fs/fifofs/fifo_vnops.c
+++ b/sys/fs/fifofs/fifo_vnops.c
@@ -447,6 +447,10 @@ fifo_printinfo(vp)
 {
 	register struct fifoinfo *fip = vp->v_fifoinfo;
 
+	if (fip == NULL){
+		printf(", NULL v_fifoinfo");
+		return (0);
+	}
 	printf(", fifo with %ld readers and %ld writers",
 		fip->fi_readers, fip->fi_writers);
 	return (0);