From 9ef2e965e55481a52d6d91ce61977a27836268d3 Mon Sep 17 00:00:00 2001 From: Hannes Frederic Sowa Date: Thu, 8 Oct 2015 18:19:53 +0200 Subject: [PATCH] ipv6: drop frames with attached skb->sk in forwarding This is a clone of commit 2ab957492d13b ("ip_forward: Drop frames with attached skb->sk") for ipv6. This commit has exactly the same reasons as the above mentioned commit, namely to prevent panics during netfilter reload or a misconfigured stack. Signed-off-by: Hannes Frederic Sowa Signed-off-by: David S. Miller --- net/ipv6/ip6_output.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 92b1aa38f121..61d403ee1031 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -376,6 +376,9 @@ int ip6_forward(struct sk_buff *skb) if (skb->pkt_type != PACKET_HOST) goto drop; + if (unlikely(skb->sk)) + goto drop; + if (skb_warn_if_lro(skb)) goto drop; -- 2.34.1