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/ipv6/esp6.c | 37 +++++++++++++++++++++++-------------- 1 file changed, 23 insertions(+), 14 deletions(-) (limited to 'net/ipv6/esp6.c') diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c index 096974ba642..5bd5292ad9f 100644 --- a/net/ipv6/esp6.c +++ b/net/ipv6/esp6.c @@ -165,30 +165,32 @@ static int esp6_input(struct xfrm_state *x, struct sk_buff *skb) goto out; } + if ((nfrags = skb_cow_data(skb, 0, &trailer)) < 0) { + ret = -EINVAL; + goto out; + } + + skb->ip_summed = CHECKSUM_NONE; + + spin_lock(&x->lock); + /* If integrity check is required, do this. */ if (esp->auth.icv_full_len) { u8 sum[alen]; ret = esp_mac_digest(esp, skb, 0, skb->len - alen); if (ret) - goto out; + goto unlock; if (skb_copy_bits(skb, skb->len - alen, sum, alen)) BUG(); if (unlikely(memcmp(esp->auth.work_icv, sum, alen))) { ret = -EBADMSG; - goto out; + goto unlock; } } - if ((nfrags = skb_cow_data(skb, 0, &trailer)) < 0) { - ret = -EINVAL; - goto out; - } - - skb->ip_summed = CHECKSUM_NONE; - esph = (struct ip_esp_hdr *)skb->data; iph = ipv6_hdr(skb); @@ -197,15 +199,13 @@ static int esp6_input(struct xfrm_state *x, struct sk_buff *skb) crypto_blkcipher_set_iv(tfm, esph->enc_data, esp->conf.ivlen); { - u8 nexthdr[2]; struct scatterlist *sg = &esp->sgbuf[0]; - u8 padlen; if (unlikely(nfrags > ESP_NUM_FAST_SG)) { sg = kmalloc(sizeof(struct scatterlist)*nfrags, GFP_ATOMIC); if (!sg) { ret = -ENOMEM; - goto out; + goto unlock; } } sg_init_table(sg, nfrags); @@ -215,8 +215,17 @@ static int esp6_input(struct xfrm_state *x, struct sk_buff *skb) ret = crypto_blkcipher_decrypt(&desc, sg, sg, elen); if (unlikely(sg != &esp->sgbuf[0])) kfree(sg); - if (unlikely(ret)) - goto out; + } + +unlock: + spin_unlock(&x->lock); + + if (unlikely(ret)) + goto out; + + { + u8 nexthdr[2]; + u8 padlen; if (skb_copy_bits(skb, skb->len-alen-2, nexthdr, 2)) BUG(); -- cgit v1.2.3