[NETNS][IPV6]: inet6_addr - make ipv6_chk_home_addr namespace aware

Looks if the address is belonging to the network namespace, otherwise
discard the address for the check.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index 77f630f..8b1509b 100644 (file)
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -65,7 +65,8 @@ extern int                    ipv6_chk_addr(struct net *net,
                                              int strict);
 
 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
-extern int                     ipv6_chk_home_addr(struct in6_addr *addr);
+extern int                     ipv6_chk_home_addr(struct net *net,
+                                                  struct in6_addr *addr);
 #endif
 extern struct inet6_ifaddr      *ipv6_get_ifaddr(struct net *net,
                                                 struct in6_addr *addr,

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index c4df6cd..803caf1 100644 (file)
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -2883,13 +2883,15 @@ void if6_proc_exit(void)
 
 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
 /* Check if address is a home address configured on any interface. */
-int ipv6_chk_home_addr(struct in6_addr *addr)
+int ipv6_chk_home_addr(struct net *net, struct in6_addr *addr)
 {
        int ret = 0;
        struct inet6_ifaddr * ifp;
        u8 hash = ipv6_addr_hash(addr);
        read_lock_bh(&addrconf_hash_lock);
        for (ifp = inet6_addr_lst[hash]; ifp; ifp = ifp->lst_next) {
+               if (ifp->idev->dev->nd_net != net)
+                       continue;
                if (ipv6_addr_cmp(&ifp->addr, addr) == 0 &&
                    (ifp->flags & IFA_F_HOMEADDRESS)) {
                        ret = 1;

diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 2df34ed..3cd1c99 100644 (file)
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -445,7 +445,7 @@ looped_back:
                        kfree_skb(skb);
                        return -1;
                }
-               if (!ipv6_chk_home_addr(addr)) {
+               if (!ipv6_chk_home_addr(&init_net, addr)) {
                        IP6_INC_STATS_BH(ip6_dst_idev(skb->dst),
                                         IPSTATS_MIB_INADDRERRORS);
                        kfree_skb(skb);