diff -Nru linux-2.4.20/net/ipv4/netfilter/ipt_ULOG.c linux-2.4.20-pom2patch/net/ipv4/netfilter/ipt_ULOG.c
--- linux-2.4.20/net/ipv4/netfilter/ipt_ULOG.c	2002-11-28 17:53:15.000000000 -0600
+++ linux-2.4.20-pom2patch/net/ipv4/netfilter/ipt_ULOG.c	2003-05-02 13:01:08.000000000 -0500
@@ -12,6 +12,7 @@
  * 	      module loadtime -HW
  * 2002/07/07 remove broken nflog_rcv() function -HW
  * 2002/08/29 fix shifted/unshifted nlgroup bug -HW
+ * 2002/10/30 fix uninitialized mac_len field - <Anders K. Pedersen>
  *
  * Released under the terms of the GPL
  *
@@ -31,7 +32,7 @@
  *   Specify, after how many clock ticks (intel: 100 per second) the queue
  * should be flushed even if it is not full yet.
  *
- * ipt_ULOG.c,v 1.21 2002/08/29 10:54:34 laforge Exp
+ * ipt_ULOG.c,v 1.22 2002/10/30 09:07:31 laforge Exp
  */
 
 #include <linux/module.h>
@@ -224,7 +225,8 @@
 	    && in->hard_header_len <= ULOG_MAC_LEN) {
 		memcpy(pm->mac, (*pskb)->mac.raw, in->hard_header_len);
 		pm->mac_len = in->hard_header_len;
-	}
+	} else
+		pm->mac_len = 0;
 
 	if (in)
 		strncpy(pm->indev_name, in->name, sizeof(pm->indev_name));
