af_unix: fix bug on large send()
commit e370a723632 ("af_unix: improve STREAM behavior with fragmented
memory") added a bug on large send() because the
skb_copy_datagram_from_iovec() call always start from the beginning
of iovec.
We must instead use the @sent variable to properly skip the
already processed part.
Reported-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index fee9e33..86de99a 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -1669,7 +1669,8 @@
skb_put(skb, size - data_len);
skb->data_len = data_len;
skb->len = size;
- err = skb_copy_datagram_from_iovec(skb, 0, msg->msg_iov, 0, size);
+ err = skb_copy_datagram_from_iovec(skb, 0, msg->msg_iov,
+ sent, size);
if (err) {
kfree_skb(skb);
goto out_err;