netfilter: merge some fixes from upstream

SVN-Revision: 15178

target/linux/generic-2.6/patches-2.6.28/120-netfilter_upstream_fixes.patch

@@ -0,0 +1,100 @@
+--- a/net/ipv4/netfilter/arp_tables.c
++++ b/net/ipv4/netfilter/arp_tables.c
+@@ -374,7 +374,9 @@ static int mark_source_chains(struct xt_
+ 			    && unconditional(&e->arp)) || visited) {
+ 				unsigned int oldpos, size;
+ 
+-				if (t->verdict < -NF_MAX_VERDICT - 1) {
++				if ((strcmp(t->target.u.user.name,
++					    ARPT_STANDARD_TARGET) == 0) &&
++				    t->verdict < -NF_MAX_VERDICT - 1) {
+ 					duprintf("mark_source_chains: bad "
+ 						"negative verdict (%i)\n",
+ 								t->verdict);
+--- a/net/ipv4/netfilter/ip_tables.c
++++ b/net/ipv4/netfilter/ip_tables.c
+@@ -74,6 +74,25 @@ do {								\
+ 
+    Hence the start of any table is given by get_table() below.  */
+ 
++static unsigned long ifname_compare(const char *_a, const char *_b,
++				    const unsigned char *_mask)
++{
++	const unsigned long *a = (const unsigned long *)_a;
++	const unsigned long *b = (const unsigned long *)_b;
++	const unsigned long *mask = (const unsigned long *)_mask;
++	unsigned long ret;
++
++	ret = (a[0] ^ b[0]) & mask[0];
++	if (IFNAMSIZ > sizeof(unsigned long))
++		ret |= (a[1] ^ b[1]) & mask[1];
++	if (IFNAMSIZ > 2 * sizeof(unsigned long))
++		ret |= (a[2] ^ b[2]) & mask[2];
++	if (IFNAMSIZ > 3 * sizeof(unsigned long))
++		ret |= (a[3] ^ b[3]) & mask[3];
++	BUILD_BUG_ON(IFNAMSIZ > 4 * sizeof(unsigned long));
++	return ret;
++}
++
+ /* Returns whether matches rule or not. */
+ /* Performance critical - called for every packet */
+ static inline bool
+@@ -83,7 +102,6 @@ ip_packet_match(const struct iphdr *ip,
+ 		const struct ipt_ip *ipinfo,
+ 		int isfrag)
+ {
+-	size_t i;
+ 	unsigned long ret;
+ 
+ #define FWINV(bool, invflg) ((bool) ^ !!(ipinfo->invflags & (invflg)))
+@@ -110,12 +128,7 @@ ip_packet_match(const struct iphdr *ip,
+ 		return false;
+ 	}
+ 
+-	/* Look for ifname matches; this should unroll nicely. */
+-	for (i = 0, ret = 0; i < IFNAMSIZ/sizeof(unsigned long); i++) {
+-		ret |= (((const unsigned long *)indev)[i]
+-			^ ((const unsigned long *)ipinfo->iniface)[i])
+-			& ((const unsigned long *)ipinfo->iniface_mask)[i];
+-	}
++	ret = ifname_compare(indev, ipinfo->iniface, ipinfo->iniface_mask);
+ 
+ 	if (FWINV(ret != 0, IPT_INV_VIA_IN)) {
+ 		dprintf("VIA in mismatch (%s vs %s).%s\n",
+@@ -124,11 +137,7 @@ ip_packet_match(const struct iphdr *ip,
+ 		return false;
+ 	}
+ 
+-	for (i = 0, ret = 0; i < IFNAMSIZ/sizeof(unsigned long); i++) {
+-		ret |= (((const unsigned long *)outdev)[i]
+-			^ ((const unsigned long *)ipinfo->outiface)[i])
+-			& ((const unsigned long *)ipinfo->outiface_mask)[i];
+-	}
++	ret = ifname_compare(outdev, ipinfo->outiface, ipinfo->outiface_mask);
+ 
+ 	if (FWINV(ret != 0, IPT_INV_VIA_OUT)) {
+ 		dprintf("VIA out mismatch (%s vs %s).%s\n",
+@@ -523,7 +532,9 @@ mark_source_chains(struct xt_table_info 
+ 			    && unconditional(&e->ip)) || visited) {
+ 				unsigned int oldpos, size;
+ 
+-				if (t->verdict < -NF_MAX_VERDICT - 1) {
++				if ((strcmp(t->target.u.user.name,
++			    		    IPT_STANDARD_TARGET) == 0) &&
++				    t->verdict < -NF_MAX_VERDICT - 1) {
+ 					duprintf("mark_source_chains: bad "
+ 						"negative verdict (%i)\n",
+ 								t->verdict);
+--- a/net/ipv6/netfilter/ip6_tables.c
++++ b/net/ipv6/netfilter/ip6_tables.c
+@@ -525,7 +525,9 @@ mark_source_chains(struct xt_table_info 
+ 			    && unconditional(&e->ipv6)) || visited) {
+ 				unsigned int oldpos, size;
+ 
+-				if (t->verdict < -NF_MAX_VERDICT - 1) {
++				if ((strcmp(t->target.u.user.name,
++					    IP6T_STANDARD_TARGET) == 0) &&
++				    t->verdict < -NF_MAX_VERDICT - 1) {
+ 					duprintf("mark_source_chains: bad "
+ 						"negative verdict (%i)\n",
+ 								t->verdict);