Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patchset contains Netfilter fixes for your net tree,
they are:

1) Fix OOM that syskaller triggers with ipt_replace.size = -1 and
   IPT_SO_SET_REPLACE socket option, from Dmitry Vyukov.

2) Check for too long extension name in xt_request_find_{match|target}
   that result in out-of-bound reads, from Eric Dumazet.

3) Fix memory exhaustion bug in ipset hash:*net* types when adding ranges
   that look like x.x.x.x-255.255.255.255, from Jozsef Kadlecsik.

4) Fix pointer leaks to userspace in x_tables, from Dmitry Vyukov.

5) Insufficient sanity checks in clusterip_tg_check(), also from Dmitry.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

12 files changed, 75 insertions, 67 deletions

diff --git a/net/netfilter/ipset/ip_set_hash_ipportnet.c b/net/netfilter/ipset/ip_set_hash_ipportnet.c
index 0f164e986bf1..88b83d6d3084 100644
--- a/net/netfilter/ipset/ip_set_hash_ipportnet.c
+++ b/net/netfilter/ipset/ip_set_hash_ipportnet.c
@@ -168,7 +168,7 @@ hash_ipportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
 	struct hash_ipportnet4_elem e = { .cidr = HOST_MASK - 1 };
 	struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
 	u32 ip = 0, ip_to = 0, p = 0, port, port_to;
-	u32 ip2_from = 0, ip2_to = 0, ip2_last, ip2;
+	u32 ip2_from = 0, ip2_to = 0, ip2;
 	bool with_ports = false;
 	u8 cidr;
 	int ret;
@@ -269,22 +269,21 @@ hash_ipportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
 		ip_set_mask_from_to(ip2_from, ip2_to, e.cidr + 1);
 	}
 
-	if (retried)
+	if (retried) {
 		ip = ntohl(h->next.ip);
+		p = ntohs(h->next.port);
+		ip2 = ntohl(h->next.ip2);
+	} else {
+		p = port;
+		ip2 = ip2_from;
+	}
 	for (; ip <= ip_to; ip++) {
 		e.ip = htonl(ip);
-		p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
-						       : port;
 		for (; p <= port_to; p++) {
 			e.port = htons(p);
-			ip2 = retried &&
-			      ip == ntohl(h->next.ip) &&
-			      p == ntohs(h->next.port)
-				? ntohl(h->next.ip2) : ip2_from;
-			while (ip2 <= ip2_to) {
+			do {
 				e.ip2 = htonl(ip2);
-				ip2_last = ip_set_range_to_cidr(ip2, ip2_to,
-								&cidr);
+				ip2 = ip_set_range_to_cidr(ip2, ip2_to, &cidr);
 				e.cidr = cidr - 1;
 				ret = adtfn(set, &e, &ext, &ext, flags);
 
@@ -292,9 +291,10 @@ hash_ipportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
 					return ret;
 
 				ret = 0;
-				ip2 = ip2_last + 1;
-			}
+			} while (ip2++ < ip2_to);
+			ip2 = ip2_from;
 		}
+		p = port;
 	}
 	return ret;
 }
diff --git a/net/netfilter/ipset/ip_set_hash_net.c b/net/netfilter/ipset/ip_set_hash_net.c
index 1c67a1761e45..5449e23af13a 100644
--- a/net/netfilter/ipset/ip_set_hash_net.c
+++ b/net/netfilter/ipset/ip_set_hash_net.c
@@ -143,7 +143,7 @@ hash_net4_uadt(struct ip_set *set, struct nlattr *tb[],
 	ipset_adtfn adtfn = set->variant->adt[adt];
 	struct hash_net4_elem e = { .cidr = HOST_MASK };
 	struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
-	u32 ip = 0, ip_to = 0, last;
+	u32 ip = 0, ip_to = 0;
 	int ret;
 
 	if (tb[IPSET_ATTR_LINENO])
@@ -193,16 +193,15 @@ hash_net4_uadt(struct ip_set *set, struct nlattr *tb[],
 	}
 	if (retried)
 		ip = ntohl(h->next.ip);
-	while (ip <= ip_to) {
+	do {
 		e.ip = htonl(ip);
-		last = ip_set_range_to_cidr(ip, ip_to, &e.cidr);
+		ip = ip_set_range_to_cidr(ip, ip_to, &e.cidr);
 		ret = adtfn(set, &e, &ext, &ext, flags);
 		if (ret && !ip_set_eexist(ret, flags))
 			return ret;
 
 		ret = 0;
-		ip = last + 1;
-	}
+	} while (ip++ < ip_to);
 	return ret;
 }
 
diff --git a/net/netfilter/ipset/ip_set_hash_netiface.c b/net/netfilter/ipset/ip_set_hash_netiface.c
index d417074f1c1a..f5164c1efce2 100644
--- a/net/netfilter/ipset/ip_set_hash_netiface.c
+++ b/net/netfilter/ipset/ip_set_hash_netiface.c
@@ -200,7 +200,7 @@ hash_netiface4_uadt(struct ip_set *set, struct nlattr *tb[],
 	ipset_adtfn adtfn = set->variant->adt[adt];
 	struct hash_netiface4_elem e = { .cidr = HOST_MASK, .elem = 1 };
 	struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
-	u32 ip = 0, ip_to = 0, last;
+	u32 ip = 0, ip_to = 0;
 	int ret;
 
 	if (tb[IPSET_ATTR_LINENO])
@@ -255,17 +255,16 @@ hash_netiface4_uadt(struct ip_set *set, struct nlattr *tb[],
 
 	if (retried)
 		ip = ntohl(h->next.ip);
-	while (ip <= ip_to) {
+	do {
 		e.ip = htonl(ip);
-		last = ip_set_range_to_cidr(ip, ip_to, &e.cidr);
+		ip = ip_set_range_to_cidr(ip, ip_to, &e.cidr);
 		ret = adtfn(set, &e, &ext, &ext, flags);
 
 		if (ret && !ip_set_eexist(ret, flags))
 			return ret;
 
 		ret = 0;
-		ip = last + 1;
-	}
+	} while (ip++ < ip_to);
 	return ret;
 }
 
diff --git a/net/netfilter/ipset/ip_set_hash_netnet.c b/net/netfilter/ipset/ip_set_hash_netnet.c
index 7f9ae2e9645b..5a2b923bd81f 100644
--- a/net/netfilter/ipset/ip_set_hash_netnet.c
+++ b/net/netfilter/ipset/ip_set_hash_netnet.c
@@ -169,8 +169,8 @@ hash_netnet4_uadt(struct ip_set *set, struct nlattr *tb[],
 	ipset_adtfn adtfn = set->variant->adt[adt];
 	struct hash_netnet4_elem e = { };
 	struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
-	u32 ip = 0, ip_to = 0, last;
-	u32 ip2 = 0, ip2_from = 0, ip2_to = 0, last2;
+	u32 ip = 0, ip_to = 0;
+	u32 ip2 = 0, ip2_from = 0, ip2_to = 0;
 	int ret;
 
 	if (tb[IPSET_ATTR_LINENO])
@@ -247,27 +247,27 @@ hash_netnet4_uadt(struct ip_set *set, struct nlattr *tb[],
 		ip_set_mask_from_to(ip2_from, ip2_to, e.cidr[1]);
 	}
 
-	if (retried)
+	if (retried) {
 		ip = ntohl(h->next.ip[0]);
+		ip2 = ntohl(h->next.ip[1]);
+	} else {
+		ip2 = ip2_from;
+	}
 
-	while (ip <= ip_to) {
+	do {
 		e.ip[0] = htonl(ip);
-		last = ip_set_range_to_cidr(ip, ip_to, &e.cidr[0]);
-		ip2 = (retried &&
-		       ip == ntohl(h->next.ip[0])) ? ntohl(h->next.ip[1])
-						   : ip2_from;
-		while (ip2 <= ip2_to) {
+		ip = ip_set_range_to_cidr(ip, ip_to, &e.cidr[0]);
+		do {
 			e.ip[1] = htonl(ip2);
-			last2 = ip_set_range_to_cidr(ip2, ip2_to, &e.cidr[1]);
+			ip2 = ip_set_range_to_cidr(ip2, ip2_to, &e.cidr[1]);
 			ret = adtfn(set, &e, &ext, &ext, flags);
 			if (ret && !ip_set_eexist(ret, flags))
 				return ret;
 
 			ret = 0;
-			ip2 = last2 + 1;
-		}
-		ip = last + 1;
-	}
+		} while (ip2++ < ip2_to);
+		ip2 = ip2_from;
+	} while (ip++ < ip_to);
 	return ret;
 }
 
diff --git a/net/netfilter/ipset/ip_set_hash_netport.c b/net/netfilter/ipset/ip_set_hash_netport.c
index e6ef382febe4..1a187be9ebc8 100644
--- a/net/netfilter/ipset/ip_set_hash_netport.c
+++ b/net/netfilter/ipset/ip_set_hash_netport.c
@@ -161,7 +161,7 @@ hash_netport4_uadt(struct ip_set *set, struct nlattr *tb[],
 	ipset_adtfn adtfn = set->variant->adt[adt];
 	struct hash_netport4_elem e = { .cidr = HOST_MASK - 1 };
 	struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
-	u32 port, port_to, p = 0, ip = 0, ip_to = 0, last;
+	u32 port, port_to, p = 0, ip = 0, ip_to = 0;
 	bool with_ports = false;
 	u8 cidr;
 	int ret;
@@ -239,25 +239,26 @@ hash_netport4_uadt(struct ip_set *set, struct nlattr *tb[],
 		ip_set_mask_from_to(ip, ip_to, e.cidr + 1);
 	}
 
-	if (retried)
+	if (retried) {
 		ip = ntohl(h->next.ip);
-	while (ip <= ip_to) {
+		p = ntohs(h->next.port);
+	} else {
+		p = port;
+	}
+	do {
 		e.ip = htonl(ip);
-		last = ip_set_range_to_cidr(ip, ip_to, &cidr);
+		ip = ip_set_range_to_cidr(ip, ip_to, &cidr);
 		e.cidr = cidr - 1;
-		p = retried && ip == ntohl(h->next.ip) ? ntohs(h->next.port)
-						       : port;
 		for (; p <= port_to; p++) {
 			e.port = htons(p);
 			ret = adtfn(set, &e, &ext, &ext, flags);
-
 			if (ret && !ip_set_eexist(ret, flags))
 				return ret;
 
 			ret = 0;
 		}
-		ip = last + 1;
-	}
+		p = port;
+	} while (ip++ < ip_to);
 	return ret;
 }
 
diff --git a/net/netfilter/ipset/ip_set_hash_netportnet.c b/net/netfilter/ipset/ip_set_hash_netportnet.c
index 8602f2595a1a..d391485a6acd 100644
--- a/net/netfilter/ipset/ip_set_hash_netportnet.c
+++ b/net/netfilter/ipset/ip_set_hash_netportnet.c
@@ -184,8 +184,8 @@ hash_netportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
 	ipset_adtfn adtfn = set->variant->adt[adt];
 	struct hash_netportnet4_elem e = { };
 	struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
-	u32 ip = 0, ip_to = 0, ip_last, p = 0, port, port_to;
-	u32 ip2_from = 0, ip2_to = 0, ip2_last, ip2;
+	u32 ip = 0, ip_to = 0, p = 0, port, port_to;
+	u32 ip2_from = 0, ip2_to = 0, ip2;
 	bool with_ports = false;
 	int ret;
 
@@ -288,33 +288,34 @@ hash_netportnet4_uadt(struct ip_set *set, struct nlattr *tb[],
 		ip_set_mask_from_to(ip2_from, ip2_to, e.cidr[1]);
 	}
 
-	if (retried)
+	if (retried) {
 		ip = ntohl(h->next.ip[0]);
+		p = ntohs(h->next.port);
+		ip2 = ntohl(h->next.ip[1]);
+	} else {
+		p = port;
+		ip2 = ip2_from;
+	}
 
-	while (ip <= ip_to) {
+	do {
 		e.ip[0] = htonl(ip);
-		ip_last = ip_set_range_to_cidr(ip, ip_to, &e.cidr[0]);
-		p = retried && ip == ntohl(h->next.ip[0]) ? ntohs(h->next.port)
-							  : port;
+		ip = ip_set_range_to_cidr(ip, ip_to, &e.cidr[0]);
 		for (; p <= port_to; p++) {
 			e.port = htons(p);
-			ip2 = (retried && ip == ntohl(h->next.ip[0]) &&
-			       p == ntohs(h->next.port)) ? ntohl(h->next.ip[1])
-							 : ip2_from;
-			while (ip2 <= ip2_to) {
+			do {
 				e.ip[1] = htonl(ip2);
-				ip2_last = ip_set_range_to_cidr(ip2, ip2_to,
-								&e.cidr[1]);
+				ip2 = ip_set_range_to_cidr(ip2, ip2_to,
+							   &e.cidr[1]);
 				ret = adtfn(set, &e, &ext, &ext, flags);
 				if (ret && !ip_set_eexist(ret, flags))
 					return ret;
 
 				ret = 0;
-				ip2 = ip2_last + 1;
-			}
+			} while (ip2++ < ip2_to);
+			ip2 = ip2_from;
 		}
-		ip = ip_last + 1;
-	}
+		p = port;
+	} while (ip++ < ip_to);
 	return ret;
 }
 
diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c
index 0b56bf05c169..8fa4d37141a7 100644
--- a/net/netfilter/x_tables.c
+++ b/net/netfilter/x_tables.c
@@ -39,7 +39,6 @@ MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
 MODULE_DESCRIPTION("{ip,ip6,arp,eb}_tables backend module");
 
-#define SMP_ALIGN(x) (((x) + SMP_CACHE_BYTES-1) & ~(SMP_CACHE_BYTES-1))
 #define XT_PCPU_BLOCK_SIZE 4096
 
 struct compat_delta {
@@ -210,6 +209,9 @@ xt_request_find_match(uint8_t nfproto, const char *name, uint8_t revision)
 {
 	struct xt_match *match;
 
+	if (strnlen(name, XT_EXTENSION_MAXNAMELEN) == XT_EXTENSION_MAXNAMELEN)
+		return ERR_PTR(-EINVAL);
+
 	match = xt_find_match(nfproto, name, revision);
 	if (IS_ERR(match)) {
 		request_module("%st_%s", xt_prefix[nfproto], name);
@@ -252,6 +254,9 @@ struct xt_target *xt_request_find_target(u8 af, const char *name, u8 revision)
 {
 	struct xt_target *target;
 
+	if (strnlen(name, XT_EXTENSION_MAXNAMELEN) == XT_EXTENSION_MAXNAMELEN)
+		return ERR_PTR(-EINVAL);
+
 	target = xt_find_target(af, name, revision);
 	if (IS_ERR(target)) {
 		request_module("%st_%s", xt_prefix[af], name);
@@ -1000,7 +1005,7 @@ struct xt_table_info *xt_alloc_table_info(unsigned int size)
 		return NULL;
 
 	/* Pedantry: prevent them from hitting BUG() in vmalloc.c --RR */
-	if ((SMP_ALIGN(size) >> PAGE_SHIFT) + 2 > totalram_pages)
+	if ((size >> PAGE_SHIFT) + 2 > totalram_pages)
 		return NULL;
 
 	info = kvmalloc(sz, GFP_KERNEL);
diff --git a/net/netfilter/xt_IDLETIMER.c b/net/netfilter/xt_IDLETIMER.c
index ee3421ad108d..6c2482b709b1 100644
--- a/net/netfilter/xt_IDLETIMER.c
+++ b/net/netfilter/xt_IDLETIMER.c
@@ -252,6 +252,7 @@ static struct xt_target idletimer_tg __read_mostly = {
 	.family		= NFPROTO_UNSPEC,
 	.target		= idletimer_tg_target,
 	.targetsize     = sizeof(struct idletimer_tg_info),
+	.usersize	= offsetof(struct idletimer_tg_info, timer),
 	.checkentry	= idletimer_tg_checkentry,
 	.destroy        = idletimer_tg_destroy,
 	.me		= THIS_MODULE,
diff --git a/net/netfilter/xt_LED.c b/net/netfilter/xt_LED.c
index 0971634e5444..1dcad893df78 100644
--- a/net/netfilter/xt_LED.c
+++ b/net/netfilter/xt_LED.c
@@ -198,6 +198,7 @@ static struct xt_target led_tg_reg __read_mostly = {
 	.family		= NFPROTO_UNSPEC,
 	.target		= led_tg,
 	.targetsize	= sizeof(struct xt_led_info),
+	.usersize	= offsetof(struct xt_led_info, internal_data),
 	.checkentry	= led_tg_check,
 	.destroy	= led_tg_destroy,
 	.me		= THIS_MODULE,
diff --git a/net/netfilter/xt_limit.c b/net/netfilter/xt_limit.c
index d27b5f1ea619..61403b77361c 100644
--- a/net/netfilter/xt_limit.c
+++ b/net/netfilter/xt_limit.c
@@ -193,9 +193,8 @@ static struct xt_match limit_mt_reg __read_mostly = {
 	.compatsize       = sizeof(struct compat_xt_rateinfo),
 	.compat_from_user = limit_mt_compat_from_user,
 	.compat_to_user   = limit_mt_compat_to_user,
-#else
-	.usersize         = offsetof(struct xt_rateinfo, prev),
 #endif
+	.usersize         = offsetof(struct xt_rateinfo, prev),
 	.me               = THIS_MODULE,
 };
 
diff --git a/net/netfilter/xt_nfacct.c b/net/netfilter/xt_nfacct.c
index cc0518fe598e..6f92d25590a8 100644
--- a/net/netfilter/xt_nfacct.c
+++ b/net/netfilter/xt_nfacct.c
@@ -62,6 +62,7 @@ static struct xt_match nfacct_mt_reg __read_mostly = {
 	.match      = nfacct_mt,
 	.destroy    = nfacct_mt_destroy,
 	.matchsize  = sizeof(struct xt_nfacct_match_info),
+	.usersize   = offsetof(struct xt_nfacct_match_info, nfacct),
 	.me         = THIS_MODULE,
 };
 
diff --git a/net/netfilter/xt_statistic.c b/net/netfilter/xt_statistic.c
index 11de55e7a868..8710fdba2ae2 100644
--- a/net/netfilter/xt_statistic.c
+++ b/net/netfilter/xt_statistic.c
@@ -84,6 +84,7 @@ static struct xt_match xt_statistic_mt_reg __read_mostly = {
 	.checkentry = statistic_mt_check,
 	.destroy    = statistic_mt_destroy,
 	.matchsize  = sizeof(struct xt_statistic_info),
+	.usersize   = offsetof(struct xt_statistic_info, master),
 	.me         = THIS_MODULE,
 };