[PATCH 0/9] Netfilter updates for net-next

[PATCH 0/9] Netfilter updates for net-next

[Pablo Neira Ayuso]

Hi David,

The following patchset contains netfilter updates for net-next, they are:

1) Add the reject expression for the nf_tables bridge family, this
   allows us to send explicit reject (TCP RST / ICMP dest unrech) to
   the packets matching a rule.

2) Simplify and consolidate the nf_tables set dumping logic. This uses
   netlink control->data to filter out depending on the request.

3) Perform garbage collection in xt_hashlimit using a workqueue instead
   of a timer, which is problematic when many entries are in place in
   the tables, from Eric Dumazet.

4) Remove leftover code from the removed ulog target support, from
   Paul Bolle.

5) Dump unmodified flags in the netfilter packet accounting when resetting
   counters, so userspace knows that a counter was in overquota situation,
   from Alexey Perevalov.

6) Fix wrong usage of the bitwise functions in nfnetlink_acct, also from
   Alexey.

7) Fix a crash when adding new set element with an empty NFTA_SET_ELEM_LIST
   attribute.

This patchset also includes a couple of cleanups for xt_LED from
Duan Jiong and for nf_conntrack_ipv4 (using coccinelle) from
Himangi Saraogi.

You can pull these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next.git

Thanks!

----------------------------------------------------------------

The following changes since commit 8fd90bb889635fa1e7f80a3950948cc2e74c1446:

  Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net (2014-07-22 00:44:59 -0700)

are available in the git repository at:


  git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next.git master

for you to fetch changes up to 7d5570ca8972aad58de0b4ad03a5e991c41d4ce2:

  netfilter: nf_tables: check for unset NFTA_SET_ELEM_LIST_ELEMENTS attribute (2014-07-31 21:11:43 +0200)

----------------------------------------------------------------
Alexey Perevalov (2):
      netfilter: nfnetlink_acct: dump unmodified nfacct flags
      netfilter: nfnetlink_acct: avoid using NFACCT_F_OVERQUOTA with bit helper functions

Duan Jiong (1):
      netfilter: xt_LED: don't output error message redundantly

Eric Dumazet (1):
      netfilter: xt_hashlimit: perform garbage collection from process context

Himangi Saraogi (1):
      netfilter: nf_conntrack: remove exceptional & on function name

Pablo Neira Ayuso (3):
      netfilter: bridge: add reject support
      netfilter: nf_tables: simplify set dump through netlink
      netfilter: nf_tables: check for unset NFTA_SET_ELEM_LIST_ELEMENTS attribute

Paul Bolle (1):
      netfilter: kill remnants of ulog targets

 include/net/netns/x_tables.h                   |    6 --
 net/bridge/netfilter/Kconfig                   |    6 ++
 net/bridge/netfilter/Makefile                  |    2 +-
 net/bridge/netfilter/nft_reject_bridge.c       |   67 ++++++++++++
 net/ipv4/netfilter/Makefile                    |    1 -
 net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c |    2 +-
 net/netfilter/nf_tables_api.c                  |  137 ++++++------------------
 net/netfilter/nfnetlink_acct.c                 |   12 ++-
 net/netfilter/xt_LED.c                         |    4 +-
 net/netfilter/xt_hashlimit.c                   |   31 +++---
 10 files changed, 133 insertions(+), 135 deletions(-)
 create mode 100644 net/bridge/netfilter/nft_reject_bridge.c

[PATCH 1/9] netfilter: bridge: add reject support

[Pablo Neira Ayuso]

So you can reject IPv4 and IPv6 packets from bridge tables. If the ether
proto is now known, default on dropping the packet instead.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/bridge/netfilter/Kconfig             |    6 +++
 net/bridge/netfilter/Makefile            |    1 +
 net/bridge/netfilter/nft_reject_bridge.c |   67 ++++++++++++++++++++++++++++++
 3 files changed, 74 insertions(+)
 create mode 100644 net/bridge/netfilter/nft_reject_bridge.c

diff --git a/net/bridge/netfilter/Kconfig b/net/bridge/netfilter/Kconfig
index 4ce0b31..9cebf47 100644
--- a/net/bridge/netfilter/Kconfig
+++ b/net/bridge/netfilter/Kconfig
@@ -14,6 +14,12 @@ config NFT_BRIDGE_META
 	help
 	  Add support for bridge dedicated meta key.
 
+config NFT_BRIDGE_REJECT
+	tristate "Netfilter nf_tables bridge reject support"
+	depends on NFT_REJECT && NFT_REJECT_IPV4 && NFT_REJECT_IPV6
+	help
+	  Add support to reject packets.
+
 config NF_LOG_BRIDGE
 	tristate "Bridge packet logging"
 
diff --git a/net/bridge/netfilter/Makefile b/net/bridge/netfilter/Makefile
index 1f78ea0..061d121 100644
--- a/net/bridge/netfilter/Makefile
+++ b/net/bridge/netfilter/Makefile
@@ -4,6 +4,7 @@
 
 obj-$(CONFIG_NF_TABLES_BRIDGE) += nf_tables_bridge.o
 obj-$(CONFIG_NFT_BRIDGE_META)  += nft_meta_bridge.o
+obj-$(CONFIG_NFT_BRIDGE_REJECT)  += nft_reject_bridge.o
 
 # packet logging
 obj-$(CONFIG_NF_LOG_BRIDGE) += nf_log_bridge.o
diff --git a/net/bridge/netfilter/nft_reject_bridge.c b/net/bridge/netfilter/nft_reject_bridge.c
new file mode 100644
index 0000000..ee3ffe9
--- /dev/null
+++ b/net/bridge/netfilter/nft_reject_bridge.c
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2014 Pablo Neira Ayuso <pablo@netfilter.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/netlink.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter/nf_tables.h>
+#include <net/netfilter/nf_tables.h>
+#include <net/netfilter/nft_reject.h>
+
+static void nft_reject_bridge_eval(const struct nft_expr *expr,
+				 struct nft_data data[NFT_REG_MAX + 1],
+				 const struct nft_pktinfo *pkt)
+{
+	switch (eth_hdr(pkt->skb)->h_proto) {
+	case htons(ETH_P_IP):
+		return nft_reject_ipv4_eval(expr, data, pkt);
+	case htons(ETH_P_IPV6):
+		return nft_reject_ipv6_eval(expr, data, pkt);
+	default:
+		/* No explicit way to reject this protocol, drop it. */
+		data[NFT_REG_VERDICT].verdict = NF_DROP;
+		break;
+	}
+}
+
+static struct nft_expr_type nft_reject_bridge_type;
+static const struct nft_expr_ops nft_reject_bridge_ops = {
+	.type		= &nft_reject_bridge_type,
+	.size		= NFT_EXPR_SIZE(sizeof(struct nft_reject)),
+	.eval		= nft_reject_bridge_eval,
+	.init		= nft_reject_init,
+	.dump		= nft_reject_dump,
+};
+
+static struct nft_expr_type nft_reject_bridge_type __read_mostly = {
+	.family		= NFPROTO_BRIDGE,
+	.name		= "reject",
+	.ops		= &nft_reject_bridge_ops,
+	.policy		= nft_reject_policy,
+	.maxattr	= NFTA_REJECT_MAX,
+	.owner		= THIS_MODULE,
+};
+
+static int __init nft_reject_bridge_module_init(void)
+{
+	return nft_register_expr(&nft_reject_bridge_type);
+}
+
+static void __exit nft_reject_bridge_module_exit(void)
+{
+	nft_unregister_expr(&nft_reject_bridge_type);
+}
+
+module_init(nft_reject_bridge_module_init);
+module_exit(nft_reject_bridge_module_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Pablo Neira Ayuso <pablo@netfilter.org>");
+MODULE_ALIAS_NFT_AF_EXPR(AF_BRIDGE, "reject");
-- 
1.7.10.4

[PATCH 2/9] netfilter: nf_tables: simplify set dump through netlink

[Pablo Neira Ayuso]

This patch uses the cb->data pointer that allows us to store the
context when dumping the set list. Thus, we don't need to parse the
original netlink message containing the dump request for each recvmsg()
call when dumping the set list. The different function flavours
depending on the dump criteria has been also merged into one single
generic function. This saves us ~100 lines of code.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_tables_api.c |  131 +++++++++--------------------------------
 1 file changed, 27 insertions(+), 104 deletions(-)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 8746ff9..ecffb26 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -2247,80 +2247,7 @@ err:
 	return err;
 }
 
-static int nf_tables_dump_sets_table(struct nft_ctx *ctx, struct sk_buff *skb,
-				     struct netlink_callback *cb)
-{
-	const struct nft_set *set;
-	unsigned int idx = 0, s_idx = cb->args[0];
-
-	if (cb->args[1])
-		return skb->len;
-
-	rcu_read_lock();
-	cb->seq = ctx->net->nft.base_seq;
-
-	list_for_each_entry_rcu(set, &ctx->table->sets, list) {
-		if (idx < s_idx)
-			goto cont;
-		if (nf_tables_fill_set(skb, ctx, set, NFT_MSG_NEWSET,
-				       NLM_F_MULTI) < 0) {
-			cb->args[0] = idx;
-			goto done;
-		}
-		nl_dump_check_consistent(cb, nlmsg_hdr(skb));
-cont:
-		idx++;
-	}
-	cb->args[1] = 1;
-done:
-	rcu_read_unlock();
-	return skb->len;
-}
-
-static int nf_tables_dump_sets_family(struct nft_ctx *ctx, struct sk_buff *skb,
-				      struct netlink_callback *cb)
-{
-	const struct nft_set *set;
-	unsigned int idx, s_idx = cb->args[0];
-	struct nft_table *table, *cur_table = (struct nft_table *)cb->args[2];
-
-	if (cb->args[1])
-		return skb->len;
-
-	rcu_read_lock();
-	cb->seq = ctx->net->nft.base_seq;
-
-	list_for_each_entry_rcu(table, &ctx->afi->tables, list) {
-		if (cur_table) {
-			if (cur_table != table)
-				continue;
-
-			cur_table = NULL;
-		}
-		ctx->table = table;
-		idx = 0;
-		list_for_each_entry_rcu(set, &ctx->table->sets, list) {
-			if (idx < s_idx)
-				goto cont;
-			if (nf_tables_fill_set(skb, ctx, set, NFT_MSG_NEWSET,
-					       NLM_F_MULTI) < 0) {
-				cb->args[0] = idx;
-				cb->args[2] = (unsigned long) table;
-				goto done;
-			}
-			nl_dump_check_consistent(cb, nlmsg_hdr(skb));
-cont:
-			idx++;
-		}
-	}
-	cb->args[1] = 1;
-done:
-	rcu_read_unlock();
-	return skb->len;
-}
-
-static int nf_tables_dump_sets_all(struct nft_ctx *ctx, struct sk_buff *skb,
-				   struct netlink_callback *cb)
+static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb)
 {
 	const struct nft_set *set;
 	unsigned int idx, s_idx = cb->args[0];
@@ -2328,6 +2255,7 @@ static int nf_tables_dump_sets_all(struct nft_ctx *ctx, struct sk_buff *skb,
 	struct nft_table *table, *cur_table = (struct nft_table *)cb->args[2];
 	struct net *net = sock_net(skb->sk);
 	int cur_family = cb->args[3];
+	struct nft_ctx *ctx = cb->data, ctx_set;
 
 	if (cb->args[1])
 		return skb->len;
@@ -2336,28 +2264,34 @@ static int nf_tables_dump_sets_all(struct nft_ctx *ctx, struct sk_buff *skb,
 	cb->seq = net->nft.base_seq;
 
 	list_for_each_entry_rcu(afi, &net->nft.af_info, list) {
+		if (ctx->afi && ctx->afi != afi)
+			continue;
+
 		if (cur_family) {
 			if (afi->family != cur_family)
 				continue;
 
 			cur_family = 0;
 		}
-
 		list_for_each_entry_rcu(table, &afi->tables, list) {
+			if (ctx->table && ctx->table != table)
+				continue;
+
 			if (cur_table) {
 				if (cur_table != table)
 					continue;
 
 				cur_table = NULL;
 			}
-
-			ctx->table = table;
-			ctx->afi = afi;
 			idx = 0;
-			list_for_each_entry_rcu(set, &ctx->table->sets, list) {
+			list_for_each_entry_rcu(set, &table->sets, list) {
 				if (idx < s_idx)
 					goto cont;
-				if (nf_tables_fill_set(skb, ctx, set,
+
+				ctx_set = *ctx;
+				ctx_set.table = table;
+				ctx_set.afi = afi;
+				if (nf_tables_fill_set(skb, &ctx_set, set,
 						       NFT_MSG_NEWSET,
 						       NLM_F_MULTI) < 0) {
 					cb->args[0] = idx;
@@ -2379,31 +2313,10 @@ done:
 	return skb->len;
 }
 
-static int nf_tables_dump_sets(struct sk_buff *skb, struct netlink_callback *cb)
+static int nf_tables_dump_sets_done(struct netlink_callback *cb)
 {
-	const struct nfgenmsg *nfmsg = nlmsg_data(cb->nlh);
-	struct nlattr *nla[NFTA_SET_MAX + 1];
-	struct nft_ctx ctx;
-	int err, ret;
-
-	err = nlmsg_parse(cb->nlh, sizeof(*nfmsg), nla, NFTA_SET_MAX,
-			  nft_set_policy);
-	if (err < 0)
-		return err;
-
-	err = nft_ctx_init_from_setattr(&ctx, cb->skb, cb->nlh, (void *)nla);
-	if (err < 0)
-		return err;
-
-	if (ctx.table == NULL) {
-		if (ctx.afi == NULL)
-			ret = nf_tables_dump_sets_all(&ctx, skb, cb);
-		else
-			ret = nf_tables_dump_sets_family(&ctx, skb, cb);
-	} else
-		ret = nf_tables_dump_sets_table(&ctx, skb, cb);
-
-	return ret;
+	kfree(cb->data);
+	return 0;
 }
 
 #define NFT_SET_INACTIVE	(1 << 15)	/* Internal set flag */
@@ -2426,7 +2339,17 @@ static int nf_tables_getset(struct sock *nlsk, struct sk_buff *skb,
 	if (nlh->nlmsg_flags & NLM_F_DUMP) {
 		struct netlink_dump_control c = {
 			.dump = nf_tables_dump_sets,
+			.done = nf_tables_dump_sets_done,
 		};
+		struct nft_ctx *ctx_dump;
+
+		ctx_dump = kmalloc(sizeof(*ctx_dump), GFP_KERNEL);
+		if (ctx_dump == NULL)
+			return -ENOMEM;
+
+		*ctx_dump = ctx;
+		c.data = ctx_dump;
+
 		return netlink_dump_start(nlsk, skb, nlh, &c);
 	}
 
-- 
1.7.10.4

[PATCH 3/9] netfilter: xt_hashlimit: perform garbage collection from process context

[Pablo Neira Ayuso]

From: Eric Dumazet <edumazet@google.com>

xt_hashlimit cannot be used with large hash tables, because garbage
collector is run from a timer. If table is really big, its possible
to hold cpu for more than 500 msec, which is unacceptable.

Switch to a work queue, and use proper scheduling points to remove
latencies spikes.

Later, we also could switch to a smoother garbage collection done
at lookup time, one bucket at a time...

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Florian Westphal <fw@strlen.de>
Cc: Patrick McHardy <kaber@trash.net>
Reviewed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/xt_hashlimit.c |   31 ++++++++++++++++---------------
 1 file changed, 16 insertions(+), 15 deletions(-)

diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c
index a3910fc..47dc683 100644
--- a/net/netfilter/xt_hashlimit.c
+++ b/net/netfilter/xt_hashlimit.c
@@ -104,7 +104,7 @@ struct xt_hashlimit_htable {
 	spinlock_t lock;		/* lock for list_head */
 	u_int32_t rnd;			/* random seed for hash */
 	unsigned int count;		/* number entries in table */
-	struct timer_list timer;	/* timer for gc */
+	struct delayed_work gc_work;
 
 	/* seq_file stuff */
 	struct proc_dir_entry *pde;
@@ -213,7 +213,7 @@ dsthash_free(struct xt_hashlimit_htable *ht, struct dsthash_ent *ent)
 	call_rcu_bh(&ent->rcu, dsthash_free_rcu);
 	ht->count--;
 }
-static void htable_gc(unsigned long htlong);
+static void htable_gc(struct work_struct *work);
 
 static int htable_create(struct net *net, struct xt_hashlimit_mtinfo1 *minfo,
 			 u_int8_t family)
@@ -273,9 +273,9 @@ static int htable_create(struct net *net, struct xt_hashlimit_mtinfo1 *minfo,
 	}
 	hinfo->net = net;
 
-	setup_timer(&hinfo->timer, htable_gc, (unsigned long)hinfo);
-	hinfo->timer.expires = jiffies + msecs_to_jiffies(hinfo->cfg.gc_interval);
-	add_timer(&hinfo->timer);
+	INIT_DEFERRABLE_WORK(&hinfo->gc_work, htable_gc);
+	queue_delayed_work(system_power_efficient_wq, &hinfo->gc_work,
+			   msecs_to_jiffies(hinfo->cfg.gc_interval));
 
 	hlist_add_head(&hinfo->node, &hashlimit_net->htables);
 
@@ -300,29 +300,30 @@ static void htable_selective_cleanup(struct xt_hashlimit_htable *ht,
 {
 	unsigned int i;
 
-	/* lock hash table and iterate over it */
-	spin_lock_bh(&ht->lock);
 	for (i = 0; i < ht->cfg.size; i++) {
 		struct dsthash_ent *dh;
 		struct hlist_node *n;
+
+		spin_lock_bh(&ht->lock);
 		hlist_for_each_entry_safe(dh, n, &ht->hash[i], node) {
 			if ((*select)(ht, dh))
 				dsthash_free(ht, dh);
 		}
+		spin_unlock_bh(&ht->lock);
+		cond_resched();
 	}
-	spin_unlock_bh(&ht->lock);
 }
 
-/* hash table garbage collector, run by timer */
-static void htable_gc(unsigned long htlong)
+static void htable_gc(struct work_struct *work)
 {
-	struct xt_hashlimit_htable *ht = (struct xt_hashlimit_htable *)htlong;
+	struct xt_hashlimit_htable *ht;
+
+	ht = container_of(work, struct xt_hashlimit_htable, gc_work.work);
 
 	htable_selective_cleanup(ht, select_gc);
 
-	/* re-add the timer accordingly */
-	ht->timer.expires = jiffies + msecs_to_jiffies(ht->cfg.gc_interval);
-	add_timer(&ht->timer);
+	queue_delayed_work(system_power_efficient_wq,
+			   &ht->gc_work, msecs_to_jiffies(ht->cfg.gc_interval));
 }
 
 static void htable_remove_proc_entry(struct xt_hashlimit_htable *hinfo)
@@ -341,7 +342,7 @@ static void htable_remove_proc_entry(struct xt_hashlimit_htable *hinfo)
 
 static void htable_destroy(struct xt_hashlimit_htable *hinfo)
 {
-	del_timer_sync(&hinfo->timer);
+	cancel_delayed_work_sync(&hinfo->gc_work);
 	htable_remove_proc_entry(hinfo);
 	htable_selective_cleanup(hinfo, select_all);
 	kfree(hinfo->name);
-- 
1.7.10.4

[PATCH 4/9] netfilter: nf_conntrack: remove exceptional & on function name

[Pablo Neira Ayuso]

From: Himangi Saraogi <himangi774@gmail.com>

In this file, function names are otherwise used as pointers without &.

A simplified version of the Coccinelle semantic patch that makes this
change is as follows:

// <smpl>
@r@
identifier f;
@@

f(...) { ... }

@@
identifier r.f;
@@

- &f
+ f
// </smpl>

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
index 4ce44c4..a054fe0 100644
--- a/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
+++ b/net/ipv4/netfilter/nf_conntrack_l3proto_ipv4.c
@@ -358,7 +358,7 @@ static struct nf_sockopt_ops so_getorigdst = {
 	.pf		= PF_INET,
 	.get_optmin	= SO_ORIGINAL_DST,
 	.get_optmax	= SO_ORIGINAL_DST+1,
-	.get		= &getorigdst,
+	.get		= getorigdst,
 	.owner		= THIS_MODULE,
 };
 
-- 
1.7.10.4

[PATCH 5/9] netfilter: xt_LED: don't output error message redundantly

[Pablo Neira Ayuso]

From: Duan Jiong <duanj.fnst@cn.fujitsu.com>

The function led_trigger_register() will only return -EEXIST when
error arises.

Signed-off-by: Duan Jiong <duanj.fnst@cn.fujitsu.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/xt_LED.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/net/netfilter/xt_LED.c b/net/netfilter/xt_LED.c
index 993de2b..f14bcf2 100644
--- a/net/netfilter/xt_LED.c
+++ b/net/netfilter/xt_LED.c
@@ -133,9 +133,7 @@ static int led_tg_check(const struct xt_tgchk_param *par)
 
 	err = led_trigger_register(&ledinternal->netfilter_led_trigger);
 	if (err) {
-		pr_warning("led_trigger_register() failed\n");
-		if (err == -EEXIST)
-			pr_warning("Trigger name is already in use.\n");
+		pr_err("Trigger name is already in use.\n");
 		goto exit_alloc;
 	}
 
-- 
1.7.10.4

[PATCH 6/9] netfilter: kill remnants of ulog targets

[Pablo Neira Ayuso]

From: Paul Bolle <pebolle@tiscali.nl>

The ulog targets were recently killed. A few references to the Kconfig
macros CONFIG_IP_NF_TARGET_ULOG and CONFIG_BRIDGE_EBT_ULOG were left
untouched. Kill these too.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 include/net/netns/x_tables.h  |    6 ------
 net/bridge/netfilter/Makefile |    1 -
 net/ipv4/netfilter/Makefile   |    1 -
 3 files changed, 8 deletions(-)

diff --git a/include/net/netns/x_tables.h b/include/net/netns/x_tables.h
index 02fe40f..c24060e 100644
--- a/include/net/netns/x_tables.h
+++ b/include/net/netns/x_tables.h
@@ -15,11 +15,5 @@ struct netns_xt {
 	struct ebt_table *frame_filter;
 	struct ebt_table *frame_nat;
 #endif
-#if IS_ENABLED(CONFIG_IP_NF_TARGET_ULOG)
-	bool ulog_warn_deprecated;
-#endif
-#if IS_ENABLED(CONFIG_BRIDGE_EBT_ULOG)
-	bool ebt_ulog_warn_deprecated;
-#endif
 };
 #endif
diff --git a/net/bridge/netfilter/Makefile b/net/bridge/netfilter/Makefile
index 061d121..be4d0ce 100644
--- a/net/bridge/netfilter/Makefile
+++ b/net/bridge/netfilter/Makefile
@@ -37,5 +37,4 @@ obj-$(CONFIG_BRIDGE_EBT_SNAT) += ebt_snat.o
 
 # watchers
 obj-$(CONFIG_BRIDGE_EBT_LOG) += ebt_log.o
-obj-$(CONFIG_BRIDGE_EBT_ULOG) += ebt_ulog.o
 obj-$(CONFIG_BRIDGE_EBT_NFLOG) += ebt_nflog.o
diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile
index 245db9d..3300162 100644
--- a/net/ipv4/netfilter/Makefile
+++ b/net/ipv4/netfilter/Makefile
@@ -57,7 +57,6 @@ obj-$(CONFIG_IP_NF_TARGET_ECN) += ipt_ECN.o
 obj-$(CONFIG_IP_NF_TARGET_MASQUERADE) += ipt_MASQUERADE.o
 obj-$(CONFIG_IP_NF_TARGET_REJECT) += ipt_REJECT.o
 obj-$(CONFIG_IP_NF_TARGET_SYNPROXY) += ipt_SYNPROXY.o
-obj-$(CONFIG_IP_NF_TARGET_ULOG) += ipt_ULOG.o
 
 # generic ARP tables
 obj-$(CONFIG_IP_NF_ARPTABLES) += arp_tables.o
-- 
1.7.10.4

[PATCH 7/9] netfilter: nfnetlink_acct: dump unmodified nfacct flags

[Pablo Neira Ayuso]

From: Alexey Perevalov <a.perevalov@samsung.com>

NFNL_MSG_ACCT_GET_CTRZERO modifies dumped flags, in this case
client see unmodified (uncleared) counter value and cleared
overquota state - end user doesn't know anything about overquota state,
unless end user subscribed on overquota report.

Signed-off-by: Alexey Perevalov <a.perevalov@samsung.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nfnetlink_acct.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/nfnetlink_acct.c b/net/netfilter/nfnetlink_acct.c
index 2baa125..11d863c 100644
--- a/net/netfilter/nfnetlink_acct.c
+++ b/net/netfilter/nfnetlink_acct.c
@@ -129,6 +129,7 @@ nfnl_acct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
 	struct nfgenmsg *nfmsg;
 	unsigned int flags = portid ? NLM_F_MULTI : 0;
 	u64 pkts, bytes;
+	u32 old_flags;
 
 	event |= NFNL_SUBSYS_ACCT << 8;
 	nlh = nlmsg_put(skb, portid, seq, event, sizeof(*nfmsg), flags);
@@ -143,6 +144,7 @@ nfnl_acct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
 	if (nla_put_string(skb, NFACCT_NAME, acct->name))
 		goto nla_put_failure;
 
+	old_flags = acct->flags;
 	if (type == NFNL_MSG_ACCT_GET_CTRZERO) {
 		pkts = atomic64_xchg(&acct->pkts, 0);
 		bytes = atomic64_xchg(&acct->bytes, 0);
@@ -160,7 +162,7 @@ nfnl_acct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
 	if (acct->flags & NFACCT_F_QUOTA) {
 		u64 *quota = (u64 *)acct->data;
 
-		if (nla_put_be32(skb, NFACCT_FLAGS, htonl(acct->flags)) ||
+		if (nla_put_be32(skb, NFACCT_FLAGS, htonl(old_flags)) ||
 		    nla_put_be64(skb, NFACCT_QUOTA, cpu_to_be64(*quota)))
 			goto nla_put_failure;
 	}
-- 
1.7.10.4

[PATCH 8/9] netfilter: nfnetlink_acct: avoid using NFACCT_F_OVERQUOTA with bit helper functions

[Pablo Neira Ayuso]

From: Alexey Perevalov <a.perevalov@samsung.com>

Bit helper functions were used for manipulation with NFACCT_F_OVERQUOTA,
but they are accepting pit position, but not a bit mask. As a result
not a third bit for NFACCT_F_OVERQUOTA was set, but forth. Such
behaviour was dangarous and could lead to unexpected overquota report
result.

Signed-off-by: Alexey Perevalov <a.perevalov@samsung.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nfnetlink_acct.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/net/netfilter/nfnetlink_acct.c b/net/netfilter/nfnetlink_acct.c
index 11d863c..3ea0eac 100644
--- a/net/netfilter/nfnetlink_acct.c
+++ b/net/netfilter/nfnetlink_acct.c
@@ -41,6 +41,7 @@ struct nf_acct {
 };
 
 #define NFACCT_F_QUOTA (NFACCT_F_QUOTA_PKTS | NFACCT_F_QUOTA_BYTES)
+#define NFACCT_OVERQUOTA_BIT	2	/* NFACCT_F_OVERQUOTA */
 
 static int
 nfnl_acct_new(struct sock *nfnl, struct sk_buff *skb,
@@ -77,7 +78,8 @@ nfnl_acct_new(struct sock *nfnl, struct sk_buff *skb,
 			smp_mb__before_atomic();
 			/* reset overquota flag if quota is enabled. */
 			if ((matching->flags & NFACCT_F_QUOTA))
-				clear_bit(NFACCT_F_OVERQUOTA, &matching->flags);
+				clear_bit(NFACCT_OVERQUOTA_BIT,
+					  &matching->flags);
 			return 0;
 		}
 		return -EBUSY;
@@ -150,7 +152,7 @@ nfnl_acct_fill_info(struct sk_buff *skb, u32 portid, u32 seq, u32 type,
 		bytes = atomic64_xchg(&acct->bytes, 0);
 		smp_mb__before_atomic();
 		if (acct->flags & NFACCT_F_QUOTA)
-			clear_bit(NFACCT_F_OVERQUOTA, &acct->flags);
+			clear_bit(NFACCT_OVERQUOTA_BIT, &acct->flags);
 	} else {
 		pkts = atomic64_read(&acct->pkts);
 		bytes = atomic64_read(&acct->bytes);
@@ -414,7 +416,7 @@ int nfnl_acct_overquota(const struct sk_buff *skb, struct nf_acct *nfacct)
 	ret = now > *quota;
 
 	if (now >= *quota &&
-	    !test_and_set_bit(NFACCT_F_OVERQUOTA, &nfacct->flags)) {
+	    !test_and_set_bit(NFACCT_OVERQUOTA_BIT, &nfacct->flags)) {
 		nfnl_overquota_report(nfacct);
 	}
 
-- 
1.7.10.4

[PATCH 9/9] netfilter: nf_tables: check for unset NFTA_SET_ELEM_LIST_ELEMENTS attribute

[Pablo Neira Ayuso]

Otherwise, the kernel oopses in nla_for_each_nested when iterating over
the unset attribute NFTA_SET_ELEM_LIST_ELEMENTS in the
nf_tables_{new,del}setelem() path.

netlink: 65524 bytes leftover after parsing attributes in process `nft'.
[...]
Oops: 0000 [#1] SMP
[...]
CPU: 2 PID: 6287 Comm: nft Not tainted 3.16.0-rc2+ #169
RIP: 0010:[<ffffffffa0526e61>]  [<ffffffffa0526e61>] nf_tables_newsetelem+0x82/0xec [nf_tables]
[...]
Call Trace:
 [<ffffffffa05178c4>] nfnetlink_rcv+0x2e7/0x3d7 [nfnetlink]
 [<ffffffffa0517939>] ? nfnetlink_rcv+0x35c/0x3d7 [nfnetlink]
 [<ffffffff8137d300>] netlink_unicast+0xf8/0x17a
 [<ffffffff8137d6a5>] netlink_sendmsg+0x323/0x351
[...]

Fix this by returning -EINVAL if this attribute is not set, which
doesn't make sense at all since those commands are there to add and to
delete elements from the set.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_tables_api.c |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index ecffb26..93692d6 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -3073,6 +3073,9 @@ static int nf_tables_newsetelem(struct sock *nlsk, struct sk_buff *skb,
 	struct nft_ctx ctx;
 	int rem, err = 0;
 
+	if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL)
+		return -EINVAL;
+
 	err = nft_ctx_init_from_elemattr(&ctx, skb, nlh, nla, true);
 	if (err < 0)
 		return err;
@@ -3156,6 +3159,9 @@ static int nf_tables_delsetelem(struct sock *nlsk, struct sk_buff *skb,
 	struct nft_ctx ctx;
 	int rem, err = 0;
 
+	if (nla[NFTA_SET_ELEM_LIST_ELEMENTS] == NULL)
+		return -EINVAL;
+
 	err = nft_ctx_init_from_elemattr(&ctx, skb, nlh, nla, false);
 	if (err < 0)
 		return err;
-- 
1.7.10.4

Re: [PATCH 0/9] Netfilter updates for net-next

[David Miller]

From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Thu, 31 Jul 2014 21:26:59 +0200

> The following patchset contains netfilter updates for net-next, they are:
 ...
> You can pull these changes from:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next.git

Pulled, thanks Pablo.