diff options
Diffstat (limited to 'net/ipv4/esp4.c')
| -rw-r--r-- | net/ipv4/esp4.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c index ffd56535041..452910dae89 100644 --- a/net/ipv4/esp4.c +++ b/net/ipv4/esp4.c @@ -8,6 +8,7 @@ #include <linux/kernel.h> #include <linux/pfkeyv2.h> #include <linux/random.h> +#include <linux/spinlock.h> #include <net/icmp.h> #include <net/protocol.h> #include <net/udp.h> @@ -66,6 +67,8 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb) top_iph->tot_len = htons(skb->len + alen); *(skb_tail_pointer(trailer) - 1) = top_iph->protocol; + spin_lock_bh(&x->lock); + /* this is non-NULL only with UDP Encapsulation */ if (x->encap) { struct xfrm_encap_tmpl *encap = x->encap; @@ -111,7 +114,7 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb) if (unlikely(nfrags > ESP_NUM_FAST_SG)) { sg = kmalloc(sizeof(struct scatterlist)*nfrags, GFP_ATOMIC); if (!sg) - goto error; + goto unlock; } skb_to_sgvec(skb, sg, esph->enc_data+esp->conf.ivlen-skb->data, clen); err = crypto_blkcipher_encrypt(&desc, sg, sg, clen); @@ -120,7 +123,7 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb) } while (0); if (unlikely(err)) - goto error; + goto unlock; if (esp->conf.ivlen) { memcpy(esph->enc_data, esp->conf.ivec, esp->conf.ivlen); @@ -133,6 +136,9 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb) memcpy(pskb_put(skb, trailer, alen), esp->auth.work_icv, alen); } +unlock: + spin_unlock_bh(&x->lock); + ip_send_check(top_iph); error: |