net: icmp6_send should use dst dev to determine L3 domain

icmp6_send is called in response to some event. The skb may not have the device set (skb->dev is NULL), but it is expected to have a dst set. Update icmp6_send to use the dst on the skb to determine L3 domain. Fixes: ca25449 ("net: Add VRF support to IPv6 stack") Signed-off-by: David Ahern <[email protected]> Signed-off-by: David S. Miller <[email protected]>
mrchapp · Nov 8, 2016 · 5d41ce2 · 5d41ce2
1 parent 20b2b24
commit 5d41ce2
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
@@ -448,7 +448,7 @@ static void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info,
 	if (__ipv6_addr_needs_scope_id(addr_type))
 		iif = skb->dev->ifindex;
 	else
-		iif = l3mdev_master_ifindex(skb->dev);
+		iif = l3mdev_master_ifindex(skb_dst(skb)->dev);
 
 	/*
 	 *	Must not send error if the source does not uniquely