netdev - Fix for ipv6_setsockopt NULL dereference

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Message-Id: <200703091515.55985.olaf.kirch@oracle.com>
Date:	Fri, 9 Mar 2007 15:15:54 +0100
From:	Olaf Kirch <olaf.kirch@...cle.com>
To:	netdev@...r.kernel.org
Subject: Fix for ipv6_setsockopt NULL dereference

I came across this bug in http://bugzilla.kernel.org/show_bug.cgi?id=8155

Here's a potential fix.

Olaf
-- 
Olaf Kirch  |  --- o --- Nous sommes du soleil we love when we play
okir@....de |    / | \   sol.dhoop.naytheet.ah kin.ir.samse.qurax
--
Fix NULL pointer derefence in ipv6_setsockopt, as described in bug #8155.

Signed-off-by: olaf.kirch@...cle.com

---
 net/ipv6/ipv6_sockglue.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: build-2.6/net/ipv6/ipv6_sockglue.c
===================================================================
--- build-2.6.orig/net/ipv6/ipv6_sockglue.c
+++ build-2.6/net/ipv6/ipv6_sockglue.c
@@ -413,7 +413,7 @@ static int do_ipv6_setsockopt(struct soc
 		}
 
 		/* routing header option needs extra check */
-		if (optname == IPV6_RTHDR && opt->srcrt) {
+		if (optname == IPV6_RTHDR && opt && opt->srcrt) {
 			struct ipv6_rt_hdr *rthdr = opt->srcrt;
 			switch (rthdr->type) {
 			case IPV6_SRCRT_TYPE_0:
-
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