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authorCosmin Ratiu <cratiu@ixiacom.com>2009-09-03 20:44:38 -0700
committerDavid S. Miller <davem@davemloft.net>2009-09-03 20:44:38 -0700
commita8fdf2b331b38d61fb5f11f3aec4a4f9fb2dedcb (patch)
tree7c5ae0e9b933a172b44a3cbeecb5374de66485ab /net/ipv6/tcp_ipv6.c
parent6fdfa97073a2bcbb60d900654c612b2ff09b9cb7 (diff)
ipv6: Fix tcp_v6_send_response(): it didn't set skb transport header
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@ixiacom.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/tcp_ipv6.c')
-rw-r--r--net/ipv6/tcp_ipv6.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 65aecf27f2c..3aae0f217d6 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1003,6 +1003,7 @@ static void tcp_v6_send_response(struct sk_buff *skb, u32 seq, u32 ack, u32 win,
skb_reserve(buff, MAX_HEADER + sizeof(struct ipv6hdr) + tot_len);
t1 = (struct tcphdr *) skb_push(buff, tot_len);
+ skb_reset_transport_header(skb);
/* Swap the send and the receive. */
memset(t1, 0, sizeof(*t1));