netrom: copy_datagram_iovec can fail
Alan Cox [Tue, 4 Sep 2012 04:13:18 +0000 (04:13 +0000)]
Check for an error from this and if so bail properly.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/netrom/af_netrom.c

index 06592d8..1b9024e 100644 (file)
@@ -1169,7 +1169,12 @@ static int nr_recvmsg(struct kiocb *iocb, struct socket *sock,
                msg->msg_flags |= MSG_TRUNC;
        }
 
-       skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+       er = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied);
+       if (er < 0) {
+               skb_free_datagram(sk, skb);
+               release_sock(sk);
+               return er;
+       }
 
        if (sax != NULL) {
                sax->sax25_family = AF_NETROM;