[src/trunk]: src/sys/netinet Oops, the mbuf may have been freed -- do a NULL ...

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

details:   https://anonhg.NetBSD.org/src/rev/b091f4dfbd52
branches:  trunk
changeset: 499134:b091f4dfbd52
user:      thorpej <thorpej%NetBSD.org@localhost>
date:      Sun Nov 12 19:29:31 2000 +0000

description:
Oops, the mbuf may have been freed -- do a NULL check in the wrapper.

diffstat:

 sys/netinet/fil.c |  13 +++++++------
 1 files changed, 7 insertions(+), 6 deletions(-)

diffs (34 lines):

diff -r 5370fe8619de -r b091f4dfbd52 sys/netinet/fil.c
--- a/sys/netinet/fil.c Sun Nov 12 18:32:43 2000 +0000
+++ b/sys/netinet/fil.c Sun Nov 12 19:29:31 2000 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: fil.c,v 1.41 2000/11/11 00:52:37 thorpej Exp $ */
+/*     $NetBSD: fil.c,v 1.42 2000/11/12 19:29:31 thorpej Exp $ */
 
 /*
  * Copyright (C) 1993-2000 by Darren Reed.
@@ -9,7 +9,7 @@
  */
 #if !defined(lint)
 #if defined(__NetBSD__)
-static const char rcsid[] = "$NetBSD: fil.c,v 1.41 2000/11/11 00:52:37 thorpej Exp $";
+static const char rcsid[] = "$NetBSD: fil.c,v 1.42 2000/11/12 19:29:31 thorpej Exp $";
 #else
 static const char sccsid[] = "@(#)fil.c        1.36 6/5/96 (C) 1993-2000 Darren Reed";
 static const char rcsid[] = "@(#)Id: fil.c,v 2.35.2.19 2000/07/27 13:08:18 darrenr Exp";
@@ -737,10 +737,11 @@
 
        rv = fr_check(ip, hlen, ifp, (dir == PFIL_OUT), mp);
 
-       ip = mtod(*mp, struct ip *);
-
-       HTONS(ip->ip_len);
-       HTONS(ip->ip_off);
+       if (*mp != NULL) {
+               ip = mtod(*mp, struct ip *);
+               HTONS(ip->ip_len);
+               HTONS(ip->ip_off);
+       }
 
        return (rv);
 }