[src/trunk]: src/sys Add KASSERTs, related to PR/39794.

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

details:   https://anonhg.NetBSD.org/src/rev/766b209d4572
branches:  trunk
changeset: 319110:766b209d4572
user:      maxv <maxv%NetBSD.org@localhost>
date:      Thu May 17 11:59:36 2018 +0000

description:
Add KASSERTs, related to PR/39794.

diffstat:

 sys/netinet/ip_input.c   |  6 ++++--
 sys/netinet6/ip6_input.c |  5 +++--
 2 files changed, 7 insertions(+), 4 deletions(-)

diffs (55 lines):

diff -r 44d4d58a0b6a -r 766b209d4572 sys/netinet/ip_input.c
--- a/sys/netinet/ip_input.c    Thu May 17 11:35:31 2018 +0000
+++ b/sys/netinet/ip_input.c    Thu May 17 11:59:36 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ip_input.c,v 1.383 2018/05/14 17:34:26 maxv Exp $      */
+/*     $NetBSD: ip_input.c,v 1.384 2018/05/17 11:59:36 maxv Exp $      */
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -91,7 +91,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ip_input.c,v 1.383 2018/05/14 17:34:26 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ip_input.c,v 1.384 2018/05/17 11:59:36 maxv Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_inet.h"
@@ -587,8 +587,10 @@
                        m = NULL;
                        goto out;
                }
+               KASSERT(m->m_len >= sizeof(struct ip));
                ip = mtod(m, struct ip *);
                hlen = ip->ip_hl << 2;
+               KASSERT(m->m_len >= hlen);
 
                /*
                 * XXX The setting of "srcrt" here is to prevent ip_forward()
diff -r 44d4d58a0b6a -r 766b209d4572 sys/netinet6/ip6_input.c
--- a/sys/netinet6/ip6_input.c  Thu May 17 11:35:31 2018 +0000
+++ b/sys/netinet6/ip6_input.c  Thu May 17 11:59:36 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ip6_input.c,v 1.202 2018/05/14 17:34:26 maxv Exp $     */
+/*     $NetBSD: ip6_input.c,v 1.203 2018/05/17 11:59:36 maxv Exp $     */
 /*     $KAME: ip6_input.c,v 1.188 2001/03/29 05:34:31 itojun Exp $     */
 
 /*
@@ -62,7 +62,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.202 2018/05/14 17:34:26 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ip6_input.c,v 1.203 2018/05/17 11:59:36 maxv Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_gateway.h"
@@ -354,6 +354,7 @@
                        return;
                if (m == NULL)
                        return;
+               KASSERT(m->m_len >= sizeof(struct ip6_hdr));
                ip6 = mtod(m, struct ip6_hdr *);
                srcrt = !IN6_ARE_ADDR_EQUAL(&odst, &ip6->ip6_dst);
        }