From de80e40d71795a22837cd56c09ae22cf330461cf Mon Sep 17 00:00:00 2001
From: phk <phk@FreeBSD.org>
Date: Sun, 7 Jan 1996 22:39:06 +0000
Subject: It's bad if the blockno is negative.

---
 sys/kern/subr_diskslice.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'sys/kern/subr_diskslice.c')

diff --git a/sys/kern/subr_diskslice.c b/sys/kern/subr_diskslice.c
index 5555a81..871d972 100644
--- a/sys/kern/subr_diskslice.c
+++ b/sys/kern/subr_diskslice.c
@@ -43,7 +43,7 @@
  *	from: wd.c,v 1.55 1994/10/22 01:57:12 phk Exp $
  *	from: @(#)ufs_disksubr.c	7.16 (Berkeley) 5/4/91
  *	from: ufs_disksubr.c,v 1.8 1994/06/07 01:21:39 phk Exp $
- *	$Id: subr_diskslice.c,v 1.14 1995/05/30 08:05:51 rgrimes Exp $
+ *	$Id: subr_diskslice.c,v 1.15 1995/09/16 17:03:49 bde Exp $
  */
 
 #include <sys/param.h>
@@ -107,6 +107,9 @@ dscheck(bp, ssp)
 	struct diskslice *sp;
 	long	sz;
 
+	if (bp->b_blkno < 0)
+		goto bad;
+
 	sp = &ssp->dss_slices[dkslice(bp->b_dev)];
 	lp = sp->ds_label;
 	sz = (bp->b_bcount + DEV_BSIZE - 1) >> DEV_BSHIFT;
-- 
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