[src/trunk]: src/sys/netinet make assumption on mbuf explicit (m->m_len >= si...

[itojun <itojun%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/c3bee5b047bd
branches:  trunk
changeset: 482130:c3bee5b047bd
user:      itojun <itojun%NetBSD.org@localhost>
date:      Tue Feb 15 00:42:22 2000 +0000

description:
make assumption on mbuf explicit (m->m_len >= sizeof (struct ip)).

diffstat:

 sys/netinet/in4_cksum.c |  6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diffs (20 lines):

diff -r 08f14006aab9 -r c3bee5b047bd sys/netinet/in4_cksum.c
--- a/sys/netinet/in4_cksum.c   Tue Feb 15 00:31:08 2000 +0000
+++ b/sys/netinet/in4_cksum.c   Tue Feb 15 00:42:22 2000 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: in4_cksum.c,v 1.2 1999/12/13 15:17:19 itojun Exp $     */
+/*     $NetBSD: in4_cksum.c,v 1.3 2000/02/15 00:42:22 itojun Exp $     */
 
 /*
  * Copyright (C) 1999 WIDE Project.
@@ -111,7 +111,9 @@
 
        /* pseudo header */
        if (off < sizeof(struct ipovly))
-               panic("offset too short");
+               panic("in4_cksum: offset too short");
+       if (m->m_len < sizeof(struct ip))
+               panic("in4_cksum: bad mbuf chain");
        bzero(&ipov, sizeof(ipov));
        ipov.ih_len = htons(len);
        ipov.ih_pr = nxt;