netdev - [PATCH] ipv6: Fix tcp_v6_send_response(): it didn't set skb transport header

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Message-Id: <200909031925.54197.cratiu@ixiacom.com>
Date:	Thu, 3 Sep 2009 19:25:53 +0300
From:	Cosmin Ratiu <cratiu@...acom.com>
To:	netdev@...r.kernel.org
Subject: [PATCH] ipv6: Fix tcp_v6_send_response(): it didn't set skb transport header

Hello,

Here is a patch which fixes an issue observed when using TCP over IPv6 and AH 
from IPsec.

When a connection gets closed the 4-way method and the last ACK from the 
server gets dropped, the subsequent FINs from the client do not get ACKed 
because tcp_v6_send_response does not set the transport header pointer. This 
causes ah6_output to try to allocate a lot of memory, which typically fails, 
so the ACKs never make it out of the stack.

I have reproduced the problem on kernel 2.6.7, but after looking at the latest 
kernel it seems the problem is still there.

Cosmin.

Signed-off-by: Cosmin Ratiu <cratiu@...acom.com>
---
 net/ipv6/tcp_ipv6.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

View attachment "0001-ipv6-Fix-tcp_v6_send_response-it-didn-t-set-skb-trans.mbox" of type "text/x-patch" (467 bytes)