From 0ebea8ef3559b545c37b016f44e84c3b33e47c39 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Tue, 13 Nov 2007 21:45:58 -0800 Subject: [IPSEC]: Move state lock into x->type->input This patch releases the lock on the state before calling x->type->input. 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 Signed-off-by: David S. Miller --- net/ipv4/ah4.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) (limited to 'net/ipv4/ah4.c') diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c index a989d29..d76803a 100644 --- a/net/ipv4/ah4.c +++ b/net/ipv4/ah4.c @@ -169,6 +169,8 @@ static int ah_input(struct xfrm_state *x, struct sk_buff *skb) if (ip_clear_mutable_options(iph, &dummy)) goto out; } + + spin_lock(&x->lock); { u8 auth_data[MAX_AH_AUTH_LEN]; @@ -176,12 +178,16 @@ static int ah_input(struct xfrm_state *x, struct sk_buff *skb) skb_push(skb, ihl); err = ah_mac_digest(ahp, skb, ah->auth_data); if (err) - goto out; - if (memcmp(ahp->work_icv, auth_data, ahp->icv_trunc_len)) { + goto unlock; + if (memcmp(ahp->work_icv, auth_data, ahp->icv_trunc_len)) err = -EBADMSG; - goto out; - } } +unlock: + spin_unlock(&x->lock); + + if (err) + goto out; + skb->network_header += ah_hlen; memcpy(skb_network_header(skb), work_buf, ihl); skb->transport_header = skb->network_header; -- cgit v1.1