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Diffstat (limited to 'net/ipv6/esp6.c')
-rw-r--r--net/ipv6/esp6.c37
1 files changed, 23 insertions, 14 deletions
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index 096974ba6420..5bd5292ad9fa 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();