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Date:	Fri, 25 May 2007 16:09:14 +0900
From:	Kazunori MIYAZAWA <>
To:	David Miller <>
Subject: [PATCH][IPSEC]: Fix IPv6 AH calculation in outbound

Hello David,

I send a patch to fix IPv6 AH calculation of outbound.
This is for the linux-2.6.22-rc2.

BTW, I sent a patch to fix kernel panic when using
inter address family IPsec on loopback.
Could you let me know the status?

Signed-off-by: Kazunori MIYAZAWA <>

diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c
index b696c84..128f94c 100644
--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -247,7 +247,7 @@ static int ah6_output(struct xfrm_state 
 	memcpy(tmp_base, top_iph, sizeof(tmp_base));
 	tmp_ext = NULL;
-	extlen = skb_transport_offset(skb) + sizeof(struct ipv6hdr);
+	extlen = skb_transport_offset(skb) - sizeof(struct ipv6hdr);
 	if (extlen) {
 		extlen += sizeof(*tmp_ext);
 		tmp_ext = kmalloc(extlen, GFP_ATOMIC);
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