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-rw-r--r--net/unix/af_unix.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index d510353ef431..eadb9020cd64 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -1442,6 +1442,7 @@ static int unix_dgram_sendmsg(struct kiocb *kiocb, struct socket *sock,
long timeo;
struct scm_cookie tmp_scm;
int max_level;
+ int data_len = 0;
if (NULL == siocb->scm)
siocb->scm = &tmp_scm;
@@ -1475,7 +1476,13 @@ static int unix_dgram_sendmsg(struct kiocb *kiocb, struct socket *sock,
if (len > sk->sk_sndbuf - 32)
goto out;
- skb = sock_alloc_send_skb(sk, len, msg->msg_flags&MSG_DONTWAIT, &err);
+ if (len > SKB_MAX_ALLOC)
+ data_len = min_t(size_t,
+ len - SKB_MAX_ALLOC,
+ MAX_SKB_FRAGS * PAGE_SIZE);
+
+ skb = sock_alloc_send_pskb(sk, len - data_len, data_len,
+ msg->msg_flags & MSG_DONTWAIT, &err);
if (skb == NULL)
goto out;
@@ -1485,8 +1492,10 @@ static int unix_dgram_sendmsg(struct kiocb *kiocb, struct socket *sock,
max_level = err + 1;
unix_get_secdata(siocb->scm, skb);
- skb_reset_transport_header(skb);
- err = memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len);
+ skb_put(skb, len - data_len);
+ skb->data_len = data_len;
+ skb->len = len;
+ err = skb_copy_datagram_from_iovec(skb, 0, msg->msg_iov, 0, len);
if (err)
goto out_free;