3.13.11-ckt20 -stable review patch. If anyone has any objections, please let
me know.
------------------
From: =?UTF-8?q?Sebastian=20P=C3=B6hn?= <sebastian.po...@gmail.com>
[ Upstream commit 2ab957492d13bb819400ac29ae55911d50a82a13 ]
Initial discussion was:
[FYI] xfrm: Don't lookup sk_policy for timewait sockets
Forwarded frames should not have a socket attached. Especially
tw sockets will lead to panics later-on in the stack.
This was observed with TPROXY assigning a tw socket and broken
policy routing (misconfigured). As a result frame enters
forwarding path instead of input. We cannot solve this in
TPROXY as it cannot know that policy routing is broken.
v2:
Remove useless comment
Signed-off-by: Sebastian Poehn <sebastian.po...@gmail.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Kamal Mostafa <ka...@canonical.com>
---
net/ipv4/ip_forward.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/ipv4/ip_forward.c b/net/ipv4/ip_forward.c
index 31ee5c6..479e8a6 100644
--- a/net/ipv4/ip_forward.c
+++ b/net/ipv4/ip_forward.c
@@ -126,6 +126,9 @@ int ip_forward(struct sk_buff *skb)
struct rtable *rt; /* Route we use */
struct ip_options *opt = &(IPCB(skb)->opt);
+ if (unlikely(skb->sk))
+ goto drop;
+
if (skb_warn_if_lro(skb))
goto drop;
--
1.9.1
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