From owner-freebsd-hackers@FreeBSD.ORG  Tue Sep 16 12:48:03 2003
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Date: Tue, 16 Sep 2003 21:47:59 +0200 (CEST)
From: Martin Blapp <mb@imp.ch>
To: hackers@freebsd.org
Message-ID: <20030916214707.K47434@cvs.imp.ch>
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Subject: Re: 4.8-stable kernel panic (fwd)
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>From: David Rhodus <drhodus@catpa.com>
>To: sysadmin@wvths.com
>Cc: Martin Blapp <mb@imp.ch>, mbr@freebsd.org, hackers@freebsd.org
>Subject: Re: 4.8-stable kernel panic

Yes, I don't think this email will make it to hackers@ because all the
email from
my office gets drop because freebsd.org''s mail server's hate me and
think everything
I sent is spam..

M_PREPEND() can fail leaving (m == NULL).

Try this and see if it will work for you.

-DR

Index: raw_ip.c
  ===================================================================
  RCS file: /data/fbsd-cvs/ncvs/src/sys/netinet/raw_ip.c,v
  retrieving revision 1.114
  diff -u -r1.114 raw_ip.c
  --- raw_ip.c	16 Sept 2003 14:46:40 -0000	1.114
  +++ raw_ip.c	16 Sept 2003 19:50:07 -0000
  @@ -288,6 +288,8 @@
   			return(EMSGSIZE);
   		}
   		M_PREPEND(m, sizeof(struct ip), M_TRYWAIT);
  +		if (m == NULL)
  +			return(ENOBUFS);
   		ip = mtod(m, struct ip *);
   		ip->ip_tos = inp->inp_ip_tos;
   		ip->ip_off = 0;