[PATCH 3/4] netrom check error on memcpy_fromiovec

[Chris Wright <chrisw@xxxxxxxx>]

Check the return value on memcpy_fromiovec().

===== net/netrom/af_netrom.c 1.40 vs edited =====
--- 1.40/net/netrom/af_netrom.c Sun Sep 21 18:17:31 2003
+++ edited/net/netrom/af_netrom.c       Fri Dec  5 16:45:14 2003
@@ -1094,7 +1094,12 @@
        SOCK_DEBUG(sk, "NET/ROM: Appending user data\n");
 
        /* User data follows immediately after the NET/ROM transport header */
-       memcpy_fromiovec(asmptr, msg->msg_iov, len);
+       if (memcpy_fromiovec(asmptr, msg->msg_iov, len)) {
+               kfree_skb(skb);
+               err = -EFAULT;
+               goto out;
+       }
+
        SOCK_DEBUG(sk, "NET/ROM: Transmitting buffer\n");
 
        if (sk->sk_state != TCP_ESTABLISHED) {