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Date: Thu, 03 Sep 2009 20:45:10 -0700 (PDT) From: David Miller <davem@...emloft.net> To: cratiu@...acom.com Cc: netdev@...r.kernel.org Subject: Re: [PATCH] ipv6: Fix tcp_v6_send_response(): it didn't set skb transport header From: Cosmin Ratiu <cratiu@...acom.com> Date: Thu, 3 Sep 2009 19:25:53 +0300 > 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. > > Signed-off-by: Cosmin Ratiu <cratiu@...acom.com> Great catch. IPV4 handles this transparently via ip_append_data() which is what it uses to send these kinds of frames. IPV6 does this stuff by hand. Applied to net-next-2.6, thanks! -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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