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From: "Andrey V. Elsukov" <ae@FreeBSD.org>
Date: Sun, 6 Nov 2016 02:33:04 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r308358 - head/sys/netinet
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Author: ae
Date: Sun Nov  6 02:33:04 2016
New Revision: 308358
URL: https://svnweb.freebsd.org/changeset/base/308358

Log:
  Initialize ip6 pointer before use.
  
  PR:		214169
  MFC after:	1 week

Modified:
  head/sys/netinet/tcp_subr.c

Modified: head/sys/netinet/tcp_subr.c
==============================================================================
--- head/sys/netinet/tcp_subr.c	Sun Nov  6 00:35:43 2016	(r308357)
+++ head/sys/netinet/tcp_subr.c	Sun Nov  6 02:33:04 2016	(r308358)
@@ -2731,6 +2731,7 @@ tcp_signature_do_compute(struct mbuf *m,
 	 * Note: Upper-Layer Packet Length comes before Next Header.
 	 */
 	case (IPV6_VERSION >> 4):
+		ip6 = mtod(m, struct ip6_hdr *);
 		in6 = ip6->ip6_src;
 		in6_clearscope(&in6);
 		MD5Update(&ctx, (char *)&in6, sizeof(struct in6_addr));