[PATCH 1/4] ax25 check error on memcpy_fromiovec

[Chris Wright <chrisw@xxxxxxxx>]

Check the return value on memcpy_fromiovec().

===== net/ax25/af_ax25.c 1.33 vs edited =====
--- 1.33/net/ax25/af_ax25.c     Tue Oct  7 06:27:14 2003
+++ edited/net/ax25/af_ax25.c   Fri Dec  5 16:43:44 2003
@@ -1534,7 +1534,12 @@
        SOCK_DEBUG(sk, "AX.25: Appending user data\n");
 
        /* User data follows immediately after the AX.25 data */
-       memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len);
+       if (memcpy_fromiovec(skb_put(skb, len), msg->msg_iov, len)) {
+               err = -EFAULT;
+               kfree_skb(skb);
+               goto out;
+       }
+
        skb->nh.raw = skb->data;
 
        /* Add the PID if one is not supplied by the user in the skb */