From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Tomanek Subject: [PATCH v2] fix possible NULL pointer Oops in fib(6)_rule_suppress Date: Sun, 17 Nov 2013 15:45:01 +0100 Message-ID: <20131117144501.GC23153@zirkel.wertarbyte.de> References: <5288CB1B.7050806@cogentembedded.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: daniel.golle@gmail.com, sergei.shtylyov@cogentembedded.com To: netdev@vger.kernel.org Return-path: Received: from zirkel.wertarbyte.de ([188.40.44.137]:47438 "EHLO zirkel.wertarbyte.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752891Ab3KQOpD (ORCPT ); Sun, 17 Nov 2013 09:45:03 -0500 Content-Disposition: inline In-Reply-To: <5288CB1B.7050806@cogentembedded.com> Sender: netdev-owner@vger.kernel.org List-ID: Reported-by: Daniel Golle Tested-by: Daniel Golle Signed-off-by: Stefan Tomanek --- net/ipv4/fib_rules.c | 5 ++++- net/ipv6/fib6_rules.c | 6 +++++- 2 files changed, 9 insertions(+), 2 deletions(-) diff --git a/net/ipv4/fib_rules.c b/net/ipv4/fib_rules.c index 523be38..f2e1573 100644 --- a/net/ipv4/fib_rules.c +++ b/net/ipv4/fib_rules.c @@ -104,7 +104,10 @@ errout: static bool fib4_rule_suppress(struct fib_rule *rule, struct fib_lookup_arg *arg) { struct fib_result *result = (struct fib_result *) arg->result; - struct net_device *dev = result->fi->fib_dev; + struct net_device *dev = NULL; + + if (result->fi) + dev = result->fi->fib_dev; /* do not accept result if the route does * not meet the required prefix length diff --git a/net/ipv6/fib6_rules.c b/net/ipv6/fib6_rules.c index e275916..3fd0a57 100644 --- a/net/ipv6/fib6_rules.c +++ b/net/ipv6/fib6_rules.c @@ -122,7 +122,11 @@ out: static bool fib6_rule_suppress(struct fib_rule *rule, struct fib_lookup_arg *arg) { struct rt6_info *rt = (struct rt6_info *) arg->result; - struct net_device *dev = rt->rt6i_idev->dev; + struct net_device *dev = NULL; + + if (rt->rt6i_idev) + dev = rt->rt6i_idev->dev; + /* do not accept result if the route does * not meet the required prefix length */ -- 1.7.10.4