diff mbox

[v2] fix possible NULL pointer Oops in fib(6)_rule_suppress

Message ID 20131117144501.GC23153@zirkel.wertarbyte.de
State Changes Requested, archived
Delegated to: David Miller
Headers show

Commit Message

Stefan Tomanek Nov. 17, 2013, 2:45 p.m. UTC 
Reported-by: Daniel Golle <daniel.golle@gmail.com>
Tested-by: Daniel Golle <daniel.golle@gmail.com>
Signed-off-by: Stefan Tomanek <stefan.tomanek@wertarbyte.de>
---
 net/ipv4/fib_rules.c  |    5 ++++-
 net/ipv6/fib6_rules.c |    6 +++++-
 2 files changed, 9 insertions(+), 2 deletions(-)

Comments

David Miller Nov. 18, 2013, 8:51 p.m. UTC | #1 
From: Stefan Tomanek <stefan.tomanek@wertarbyte.de>
Date: Sun, 17 Nov 2013 15:45:01 +0100

> Reported-by: Daniel Golle <daniel.golle@gmail.com>
> Tested-by: Daniel Golle <daniel.golle@gmail.com>
> Signed-off-by: Stefan Tomanek <stefan.tomanek@wertarbyte.de>

Please us an appropriate subsystem prefix in your Subject lines, otherwise
the commit message header is less useful for others scanning the commit
log.

"inet: " would work well in this case.
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diff mbox

Patch

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
 	 */