[PATCH] [net/ipv6] ip6_output: Add ipv6_pinfo null check

[Gaurav Singh]

ipv6_pinfo is initlialized by inet6_sk() which returns NULL. 
Hence it can cause segmentation fault. Fix this by adding a 
NULL check.

Signed-off-by: Gaurav Singh <gaurav1086@xxxxxxxxx>
---
 net/ipv6/ip6_output.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 8a8c2d0cfcc8..7c077a6847e4 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -181,10 +181,10 @@ int ip6_output(struct net *net, struct sock *sk, struct sk_buff *skb)
 
 bool ip6_autoflowlabel(struct net *net, const struct ipv6_pinfo *np)
 {
-	if (!np->autoflowlabel_set)
-		return ip6_default_np_autolabel(net);
-	else
+	if (np && np->autoflowlabel_set)
 		return np->autoflowlabel;
+	else
+		ip6_default_np_autolabel(net);
 }
 
 /*
-- 
2.17.1