diff -up iptables-1.4.3.1/extensions/libipt_realm.c.cloexec iptables-1.4.3.1/extensions/libipt_realm.c
--- iptables-1.4.3.1/extensions/libipt_realm.c.cloexec	2009-03-24 13:08:24.000000000 +0100
+++ iptables-1.4.3.1/extensions/libipt_realm.c	2009-03-30 14:23:11.000000000 +0200
@@ -49,7 +49,7 @@ static void load_realms(void)
 	int id;
 	struct realmname *oldnm = NULL, *newnm = NULL;
 
-	fil = fopen(rfnm, "r");
+	fil = fopen(rfnm, "re");
 	if (!fil) {
 		rdberr = 1;
 		return;
@@ -248,7 +248,7 @@ static struct xtables_match realm_mt_reg
 	.extra_opts	= realm_opts,
 };
 
-void _init(void)
+void __attribute((constructor)) nf_ext_init(void)
 {
 	xtables_register_match(&realm_mt_reg);
 }
diff -up iptables-1.4.3.1/ip6tables-restore.c.cloexec iptables-1.4.3.1/ip6tables-restore.c
--- iptables-1.4.3.1/ip6tables-restore.c.cloexec	2009-03-24 13:08:24.000000000 +0100
+++ iptables-1.4.3.1/ip6tables-restore.c	2009-03-30 14:23:11.000000000 +0200
@@ -169,7 +169,7 @@ int main(int argc, char *argv[])
 	}
 
 	if (optind == argc - 1) {
-		in = fopen(argv[optind], "r");
+		in = fopen(argv[optind], "re");
 		if (!in) {
 			fprintf(stderr, "Can't open %s: %s\n", argv[optind],
 				strerror(errno));
diff -up iptables-1.4.3.1/ip6tables-save.c.cloexec iptables-1.4.3.1/ip6tables-save.c
--- iptables-1.4.3.1/ip6tables-save.c.cloexec	2009-03-24 13:08:24.000000000 +0100
+++ iptables-1.4.3.1/ip6tables-save.c	2009-03-30 14:24:11.000000000 +0200
@@ -41,7 +41,7 @@ static int for_each_table(int (*func)(co
 	FILE *procfile = NULL;
 	char tablename[IP6T_TABLE_MAXNAMELEN+1];
 
-	procfile = fopen("/proc/net/ip6_tables_names", "r");
+	procfile = fopen("/proc/net/ip6_tables_names", "re");
 	if (!procfile)
 		return ret;
 
diff -up iptables-1.4.3.1/iptables-restore.c.cloexec iptables-1.4.3.1/iptables-restore.c
--- iptables-1.4.3.1/iptables-restore.c.cloexec	2009-03-24 13:08:24.000000000 +0100
+++ iptables-1.4.3.1/iptables-restore.c	2009-03-30 14:23:11.000000000 +0200
@@ -175,7 +175,7 @@ main(int argc, char *argv[])
 	}
 
 	if (optind == argc - 1) {
-		in = fopen(argv[optind], "r");
+		in = fopen(argv[optind], "re");
 		if (!in) {
 			fprintf(stderr, "Can't open %s: %s\n", argv[optind],
 				strerror(errno));
diff -up iptables-1.4.3.1/iptables-save.c.cloexec iptables-1.4.3.1/iptables-save.c
--- iptables-1.4.3.1/iptables-save.c.cloexec	2009-03-24 13:08:24.000000000 +0100
+++ iptables-1.4.3.1/iptables-save.c	2009-03-30 14:24:33.000000000 +0200
@@ -39,7 +39,7 @@ static int for_each_table(int (*func)(co
 	FILE *procfile = NULL;
 	char tablename[IPT_TABLE_MAXNAMELEN+1];
 
-	procfile = fopen("/proc/net/ip_tables_names", "r");
+	procfile = fopen("/proc/net/ip_tables_names", "re");
 	if (!procfile)
 		return ret;
 
diff -up iptables-1.4.3.1/iptables-xml.c.cloexec iptables-1.4.3.1/iptables-xml.c
--- iptables-1.4.3.1/iptables-xml.c.cloexec	2009-03-24 13:08:24.000000000 +0100
+++ iptables-1.4.3.1/iptables-xml.c	2009-03-30 14:23:11.000000000 +0200
@@ -653,7 +653,7 @@ main(int argc, char *argv[])
 	}
 
 	if (optind == argc - 1) {
-		in = fopen(argv[optind], "r");
+		in = fopen(argv[optind], "re");
 		if (!in) {
 			fprintf(stderr, "Can't open %s: %s", argv[optind],
 				strerror(errno));
diff -up iptables-1.4.3.1/xtables.c.cloexec iptables-1.4.3.1/xtables.c
--- iptables-1.4.3.1/xtables.c.cloexec	2009-03-24 13:08:24.000000000 +0100
+++ iptables-1.4.3.1/xtables.c	2009-03-30 14:25:51.000000000 +0200
@@ -280,6 +280,11 @@ static char *get_modprobe(void)
 	procfile = open(PROC_SYS_MODPROBE, O_RDONLY);
 	if (procfile < 0)
 		return NULL;
+ 	if (fcntl(procfile, F_SETFD, FD_CLOEXEC) == -1) {
+ 		fprintf(stderr, "Could not set close on exec: %s\n",
+ 			strerror(errno));
+ 		exit(1);
+ 	}
 
 	ret = (char *) malloc(PROCFILE_BUFSIZ);
 	if (ret) {
@@ -672,6 +677,12 @@ static int compatible_revision(const cha
 		exit(1);
 	}
 
+	if (fcntl(sockfd, F_SETFD, FD_CLOEXEC) == -1) {
+		fprintf(stderr, "Could not set close on exec: %s\n",
+			strerror(errno));
+		exit(1);
+	}
+
 	xtables_load_ko(xtables_modprobe_program, true);
 
 	strcpy(rev.name, name);