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When we call m_makewritable() the mbuf might be copied - so don't use

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stale mtod()'d pointers from before.
This commit is contained in:
martin 2005-02-21 22:01:52 +00:00
parent 24db4c5a14
commit 65c3e91025
1 changed files with 5 additions and 3 deletions
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8
sys/dist/ipf/netinet/ip_fil_netbsd.c vendored
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@ -1,4 +1,4 @@
/* $NetBSD: ip_fil_netbsd.c,v 1.9 2005/02/19 21:30:25 martti Exp $ */
/* $NetBSD: ip_fil_netbsd.c,v 1.10 2005/02/21 22:01:52 martin Exp $ */
/*
* Copyright (C) 1993-2003 by Darren Reed.
@ -135,8 +135,8 @@ struct mbuf **mp;
struct ifnet *ifp;
int dir;
{
struct ip *ip = mtod(*mp, struct ip *);
int rv, hlen = ip->ip_hl << 2;
struct ip *ip;
int rv, hlen;
#if __NetBSD_Version__ >= 200080000
/*
* ensure that mbufs are writable beforehand
@ -151,6 +151,8 @@ int dir;
return error;
}
#endif
ip = mtod(*mp, struct ip *);
hlen = ip->ip_hl << 2;
#ifdef INET
#if defined(M_CSUM_TCPv4)