netrom: copy_datagram_iovec can fail

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>

1 files changed, 6 insertions, 1 deletions

diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index 06592d8b4a2b..1b9024ee963c 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -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;