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authorHannes Frederic Sowa <hannes@stressinduktion.org>2015-10-08 18:19:53 +0200
committerSasha Levin <sasha.levin@oracle.com>2016-03-14 17:03:05 -0400
commitb014bae072a1dad1767c5c6e7e7b480165685c3e (patch)
parentb5c41530ef442dba667c4d964c722e8157f7da72 (diff)
ipv6: drop frames with attached skb->sk in forwarding
[ Upstream commit 9ef2e965e55481a52d6d91ce61977a27836268d3 ] 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 <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 36b9ac48b8fb..06bf4010d3ed 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;