From: Denis V. Lunev <den@openvz.org>
Date: Tue, 15 Jan 2008 07:06:19 +0000 (-0800)
Subject: [NETNS]: Process inet_confirm_addr in the correct namespace.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=39a6d06300128d32f361f4f790beba0ca83730eb;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[NETNS]: Process inet_confirm_addr in the correct namespace.

inet_confirm_addr can be called with NULL in_dev from arp_ignore iff
scope is RT_SCOPE_LINK.

Lets always pass the device and check for RT_SCOPE_LINK scope inside
inet_confirm_addr. This let us take network namespace from in_device a
need for an additional argument.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 6f0827b2b154..b2c19cb12063 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -402,7 +402,6 @@ static int arp_ignore(struct in_device *in_dev, __be32 sip, __be32 tip)
 	case 3:	/* Do not reply for scope host addresses */
 		sip = 0;
 		scope = RT_SCOPE_LINK;
-		in_dev = NULL;
 		break;
 	case 4:	/* Reserved */
 	case 5:
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index dc1665a2b075..e381edb19b23 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -978,13 +978,15 @@ __be32 inet_confirm_addr(struct in_device *in_dev,
 {
 	__be32 addr = 0;
 	struct net_device *dev;
+	struct net *net;
 
-	if (in_dev != NULL)
+	if (scope != RT_SCOPE_LINK)
 		return confirm_addr_indev(in_dev, dst, local, scope);
 
+	net = in_dev->dev->nd_net;
 	read_lock(&dev_base_lock);
 	rcu_read_lock();
-	for_each_netdev(&init_net, dev) {
+	for_each_netdev(net, dev) {
 		if ((in_dev = __in_dev_get_rcu(dev))) {
 			addr = confirm_addr_indev(in_dev, dst, local, scope);
 			if (addr)