diff options
Diffstat (limited to 'net/ipv4/ah4.c')
| -rw-r--r-- | net/ipv4/ah4.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c index a989d29b44ea..d76803a3dcae 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; |