Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next

Conflicts:
	net/netfilter/core.c
	net/netfilter/nf_tables_netdev.c

Resolve two conflicts before pull request for David's net-next tree:

1) Between c73c248490 ("netfilter: nf_tables_netdev: remove redundant
   ip_hdr assignment") from the net tree and commit ddc8b6027a
   ("netfilter: introduce nft_set_pktinfo_{ipv4, ipv6}_validate()").

2) Between e8bffe0cf9 ("net: Add _nf_(un)register_hooks symbols") and
   Aaron Conole's patches to replace list_head with single linked list.

Signed-off-by: Pablo Neira Ayuso <[email protected]>

net/bridge/br_input.c

@@ -80,13 +80,10 @@ static void br_do_proxy_arp(struct sk_buff *skb, struct net_bridge *br,
 
 	BR_INPUT_SKB_CB(skb)->proxyarp_replied = false;
 
-	if (dev->flags & IFF_NOARP)
+	if ((dev->flags & IFF_NOARP) ||
+	    !pskb_may_pull(skb, arp_hdr_len(dev)))
 		return;
 
-	if (!pskb_may_pull(skb, arp_hdr_len(dev))) {
-		dev->stats.tx_dropped++;
-		return;
-	}
 	parp = arp_hdr(skb);
 
 	if (parp->ar_pro != htons(ETH_P_IP) ||

net/bridge/br_multicast.c

@@ -1138,7 +1138,7 @@ static int br_ip6_multicast_mld2_report(struct net_bridge *br,
 		} else {
 			err = br_ip6_multicast_add_group(br, port,
 							 &grec->grec_mca, vid);
-			if (!err)
+			if (err)
 				break;
 		}
 	}

net/bridge/br_stp_if.c

@@ -134,17 +134,36 @@ void br_stp_disable_port(struct net_bridge_port *p)
 		br_become_root_bridge(br);
 }
 
+static int br_stp_call_user(struct net_bridge *br, char *arg)
+{
+	char *argv[] = { BR_STP_PROG, br->dev->name, arg, NULL };
+	char *envp[] = { NULL };
+	int rc;
+
+	/* call userspace STP and report program errors */
+	rc = call_usermodehelper(BR_STP_PROG, argv, envp, UMH_WAIT_PROC);
+	if (rc > 0) {
+		if (rc & 0xff)
+			br_debug(br, BR_STP_PROG " received signal %d\n",
+				 rc & 0x7f);
+		else
+			br_debug(br, BR_STP_PROG " exited with code %d\n",
+				 (rc >> 8) & 0xff);
+	}
+
+	return rc;
+}
+
 static void br_stp_start(struct net_bridge *br)
 {
-	int r;
-	char *argv[] = { BR_STP_PROG, br->dev->name, "start", NULL };
-	char *envp[] = { NULL };
 	struct net_bridge_port *p;
+	int err = -ENOENT;
 
 	if (net_eq(dev_net(br->dev), &init_net))
-		r = call_usermodehelper(BR_STP_PROG, argv, envp, UMH_WAIT_PROC);
-	else
-		r = -ENOENT;
+		err = br_stp_call_user(br, "start");
+
+	if (err && err != -ENOENT)
+		br_err(br, "failed to start userspace STP (%d)\n", err);
 
 	spin_lock_bh(&br->lock);
 
@@ -153,9 +172,10 @@ static void br_stp_start(struct net_bridge *br)
 	else if (br->bridge_forward_delay > BR_MAX_FORWARD_DELAY)
 		__br_set_forward_delay(br, BR_MAX_FORWARD_DELAY);
 
-	if (r == 0) {
+	if (!err) {
 		br->stp_enabled = BR_USER_STP;
 		br_debug(br, "userspace STP started\n");
+
 		/* Stop hello and hold timers */
 		del_timer(&br->hello_timer);
 		list_for_each_entry(p, &br->port_list, list)
@@ -173,14 +193,13 @@ static void br_stp_start(struct net_bridge *br)
 
 static void br_stp_stop(struct net_bridge *br)
 {
-	int r;
-	char *argv[] = { BR_STP_PROG, br->dev->name, "stop", NULL };
-	char *envp[] = { NULL };
 	struct net_bridge_port *p;
+	int err;
 
 	if (br->stp_enabled == BR_USER_STP) {
-		r = call_usermodehelper(BR_STP_PROG, argv, envp, UMH_WAIT_PROC);
-		br_info(br, "userspace STP stopped, return code %d\n", r);
+		err = br_stp_call_user(br, "stop");
+		if (err)
+			br_err(br, "failed to stop userspace STP (%d)\n", err);
 
 		/* To start timers on any ports left in blocking */
 		mod_timer(&br->hello_timer, jiffies + br->hello_time);

net/bridge/netfilter/ebtables.c

@@ -368,6 +368,8 @@ ebt_check_match(struct ebt_entry_match *m, struct xt_mtchk_param *par,
 
 	match = xt_find_match(NFPROTO_BRIDGE, m->u.name, 0);
 	if (IS_ERR(match) || match->family != NFPROTO_BRIDGE) {
+		if (!IS_ERR(match))
+			module_put(match->me);
 		request_module("ebt_%s", m->u.name);
 		match = xt_find_match(NFPROTO_BRIDGE, m->u.name, 0);
 	}

net/bridge/netfilter/nft_meta_bridge.c

@@ -86,6 +86,7 @@ static const struct nft_expr_ops nft_meta_bridge_set_ops = {
 	.init		= nft_meta_set_init,
 	.destroy	= nft_meta_set_destroy,
 	.dump		= nft_meta_set_dump,
+	.validate	= nft_meta_set_validate,
 };
 
 static const struct nft_expr_ops *