diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index d51a8c0b3372d09ad1c78b76f94b4ebaf7ca3f61..ebfeb64ac67b0e3bda97d73315a29ce8d28b923a 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -4491,6 +4491,7 @@ static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
 	[IFA_CACHEINFO]		= { .len = sizeof(struct ifa_cacheinfo) },
 	[IFA_FLAGS]		= { .len = sizeof(u32) },
 	[IFA_RT_PRIORITY]	= { .len = sizeof(u32) },
+	[IFA_TARGET_NETNSID]	= { .type = NLA_S32 },
 };
 
 static int
@@ -4794,7 +4795,8 @@ static inline int inet6_ifaddr_msgsize(void)
 }
 
 static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
-			     u32 portid, u32 seq, int event, unsigned int flags)
+			     u32 portid, u32 seq, int event, unsigned int flags,
+			     int netnsid)
 {
 	struct nlmsghdr  *nlh;
 	u32 preferred, valid;
@@ -4806,6 +4808,9 @@ static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
 	put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
 		      ifa->idev->dev->ifindex);
 
+	if (netnsid >= 0 && nla_put_s32(skb, IFA_TARGET_NETNSID, netnsid))
+		goto error;
+
 	if (!((ifa->flags&IFA_F_PERMANENT) &&
 	      (ifa->prefered_lft == INFINITY_LIFE_TIME))) {
 		preferred = ifa->prefered_lft;
@@ -4855,7 +4860,8 @@ static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
 }
 
 static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
-				u32 portid, u32 seq, int event, u16 flags)
+			       u32 portid, u32 seq, int event, u16 flags,
+			       int netnsid)
 {
 	struct nlmsghdr  *nlh;
 	u8 scope = RT_SCOPE_UNIVERSE;
@@ -4868,6 +4874,9 @@ static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
 	if (!nlh)
 		return -EMSGSIZE;
 
+	if (netnsid >= 0 && nla_put_s32(skb, IFA_TARGET_NETNSID, netnsid))
+		return -EMSGSIZE;
+
 	put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
 	if (nla_put_in6_addr(skb, IFA_MULTICAST, &ifmca->mca_addr) < 0 ||
 	    put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
@@ -4881,7 +4890,8 @@ static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
 }
 
 static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
-				u32 portid, u32 seq, int event, unsigned int flags)
+			       u32 portid, u32 seq, int event,
+			       unsigned int flags, int netnsid)
 {
 	struct net_device *dev = fib6_info_nh_dev(ifaca->aca_rt);
 	int ifindex = dev ? dev->ifindex : 1;
@@ -4895,6 +4905,9 @@ static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
 	if (!nlh)
 		return -EMSGSIZE;
 
+	if (netnsid >= 0 && nla_put_s32(skb, IFA_TARGET_NETNSID, netnsid))
+		return -EMSGSIZE;
+
 	put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
 	if (nla_put_in6_addr(skb, IFA_ANYCAST, &ifaca->aca_addr) < 0 ||
 	    put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
@@ -4916,7 +4929,7 @@ enum addr_type_t {
 /* called with rcu_read_lock() */
 static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
 			  struct netlink_callback *cb, enum addr_type_t type,
-			  int s_ip_idx, int *p_ip_idx)
+			  int s_ip_idx, int *p_ip_idx, int netnsid)
 {
 	struct ifmcaddr6 *ifmca;
 	struct ifacaddr6 *ifaca;
@@ -4936,7 +4949,7 @@ static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
 						NETLINK_CB(cb->skb).portid,
 						cb->nlh->nlmsg_seq,
 						RTM_NEWADDR,
-						NLM_F_MULTI);
+						NLM_F_MULTI, netnsid);
 			if (err < 0)
 				break;
 			nl_dump_check_consistent(cb, nlmsg_hdr(skb));
@@ -4953,7 +4966,7 @@ static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
 						  NETLINK_CB(cb->skb).portid,
 						  cb->nlh->nlmsg_seq,
 						  RTM_GETMULTICAST,
-						  NLM_F_MULTI);
+						  NLM_F_MULTI, netnsid);
 			if (err < 0)
 				break;
 		}
@@ -4968,7 +4981,7 @@ static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
 						  NETLINK_CB(cb->skb).portid,
 						  cb->nlh->nlmsg_seq,
 						  RTM_GETANYCAST,
-						  NLM_F_MULTI);
+						  NLM_F_MULTI, netnsid);
 			if (err < 0)
 				break;
 		}
@@ -4985,6 +4998,9 @@ static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
 			   enum addr_type_t type)
 {
 	struct net *net = sock_net(skb->sk);
+	struct nlattr *tb[IFA_MAX+1];
+	struct net *tgt_net = net;
+	int netnsid = -1;
 	int h, s_h;
 	int idx, ip_idx;
 	int s_idx, s_ip_idx;
@@ -4996,11 +5012,22 @@ static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
 	s_idx = idx = cb->args[1];
 	s_ip_idx = ip_idx = cb->args[2];
 
+	if (nlmsg_parse(cb->nlh, sizeof(struct ifaddrmsg), tb, IFA_MAX,
+			ifa_ipv6_policy, NULL) >= 0) {
+		if (tb[IFA_TARGET_NETNSID]) {
+			netnsid = nla_get_s32(tb[IFA_TARGET_NETNSID]);
+
+			tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid);
+			if (IS_ERR(tgt_net))
+				return PTR_ERR(tgt_net);
+		}
+	}
+
 	rcu_read_lock();
-	cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq;
+	cb->seq = atomic_read(&tgt_net->ipv6.dev_addr_genid) ^ tgt_net->dev_base_seq;
 	for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
 		idx = 0;
-		head = &net->dev_index_head[h];
+		head = &tgt_net->dev_index_head[h];
 		hlist_for_each_entry_rcu(dev, head, index_hlist) {
 			if (idx < s_idx)
 				goto cont;
@@ -5012,7 +5039,7 @@ static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
 				goto cont;
 
 			if (in6_dump_addrs(idev, skb, cb, type,
-					   s_ip_idx, &ip_idx) < 0)
+					   s_ip_idx, &ip_idx, netnsid) < 0)
 				goto done;
 cont:
 			idx++;
@@ -5023,6 +5050,8 @@ static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
 	cb->args[0] = h;
 	cb->args[1] = idx;
 	cb->args[2] = ip_idx;
+	if (netnsid >= 0)
+		put_net(tgt_net);
 
 	return skb->len;
 }
@@ -5053,12 +5082,14 @@ static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh,
 			     struct netlink_ext_ack *extack)
 {
 	struct net *net = sock_net(in_skb->sk);
+	struct net *tgt_net = net;
 	struct ifaddrmsg *ifm;
 	struct nlattr *tb[IFA_MAX+1];
 	struct in6_addr *addr = NULL, *peer;
 	struct net_device *dev = NULL;
 	struct inet6_ifaddr *ifa;
 	struct sk_buff *skb;
+	int netnsid = -1;
 	int err;
 
 	err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy,
@@ -5066,15 +5097,24 @@ static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh,
 	if (err < 0)
 		return err;
 
+	if (tb[IFA_TARGET_NETNSID]) {
+		netnsid = nla_get_s32(tb[IFA_TARGET_NETNSID]);
+
+		tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(in_skb).sk,
+						  netnsid);
+		if (IS_ERR(tgt_net))
+			return PTR_ERR(tgt_net);
+	}
+
 	addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer);
 	if (!addr)
 		return -EINVAL;
 
 	ifm = nlmsg_data(nlh);
 	if (ifm->ifa_index)
-		dev = dev_get_by_index(net, ifm->ifa_index);
+		dev = dev_get_by_index(tgt_net, ifm->ifa_index);
 
-	ifa = ipv6_get_ifaddr(net, addr, dev, 1);
+	ifa = ipv6_get_ifaddr(tgt_net, addr, dev, 1);
 	if (!ifa) {
 		err = -EADDRNOTAVAIL;
 		goto errout;
@@ -5087,19 +5127,22 @@ static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh,
 	}
 
 	err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid,
-				nlh->nlmsg_seq, RTM_NEWADDR, 0);
+				nlh->nlmsg_seq, RTM_NEWADDR, 0, netnsid);
 	if (err < 0) {
 		/* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
 		WARN_ON(err == -EMSGSIZE);
 		kfree_skb(skb);
 		goto errout_ifa;
 	}
-	err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
+	err = rtnl_unicast(skb, tgt_net, NETLINK_CB(in_skb).portid);
 errout_ifa:
 	in6_ifa_put(ifa);
 errout:
 	if (dev)
 		dev_put(dev);
+	if (netnsid >= 0)
+		put_net(tgt_net);
+
 	return err;
 }
 
@@ -5113,7 +5156,7 @@ static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
 	if (!skb)
 		goto errout;
 
-	err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
+	err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0, -1);
 	if (err < 0) {
 		/* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
 		WARN_ON(err == -EMSGSIZE);