--- linux-2.4.20/net/ipv4/netfilter/ip_conntrack_irc.c.orig	2002-12-01 02:32:52.000000000 +0100
+++ linux-2.4.20/net/ipv4/netfilter/ip_conntrack_irc.c	2003-05-12 02:10:01.000000000 +0200
@@ -82,6 +82,12 @@
 	ad_beg_p	returns pointer to first byte of addr data
 	ad_end_p	returns pointer to last byte of addr data */
 {
+	/* handle quoted arguments containing spaces */
+	if (*data == '"')
+		/* at least 14: "\" AAAAAAAA P\1\n" */
+		while (*++data != '"')
+			if (data > data_end - 14)
+				return -1;
 
 	/* at least 12: "AAAAAAAA P\1\n" */
 	while (*data++ != ' ')