From b7c6538cd84f8072fad43bfce530f5bf695edbba Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Tue, 9 Oct 2007 13:33:35 -0700
Subject: [IPSEC]: Move state lock into x->type->output

This patch releases the lock on the state before calling x->type->output.
It also adds the lock to the spots where they're currently needed.

Most of those places (all except mip6) are expected to disappear with
async crypto.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/ipv4/ah4.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'net/ipv4/ah4.c')

diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c
index 58af298e1941..3513149c3843 100644
--- a/net/ipv4/ah4.c
+++ b/net/ipv4/ah4.c
@@ -5,6 +5,7 @@
 #include <net/ah.h>
 #include <linux/crypto.h>
 #include <linux/pfkeyv2.h>
+#include <linux/spinlock.h>
 #include <net/icmp.h>
 #include <net/protocol.h>
 #include <asm/scatterlist.h>
@@ -97,10 +98,14 @@ static int ah_output(struct xfrm_state *x, struct sk_buff *skb)
 	ah->reserved = 0;
 	ah->spi = x->id.spi;
 	ah->seq_no = htonl(XFRM_SKB_CB(skb)->seq);
+
+	spin_lock_bh(&x->lock);
 	err = ah_mac_digest(ahp, skb, ah->auth_data);
+	memcpy(ah->auth_data, ahp->work_icv, ahp->icv_trunc_len);
+	spin_unlock_bh(&x->lock);
+
 	if (err)
 		goto error;
-	memcpy(ah->auth_data, ahp->work_icv, ahp->icv_trunc_len);
 
 	top_iph->tos = iph->tos;
 	top_iph->ttl = iph->ttl;
-- 
cgit