2 files changed, 9 insertions, 3 deletions

diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
index be597749c385..8e3a1fd938ab 100644
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -252,7 +252,7 @@ config IP_MROUTE
 
 config IP_MROUTE_MULTIPLE_TABLES
         bool "IP: multicast policy routing"
-        depends on IP_ADVANCED_ROUTER
+        depends on IP_MROUTE && IP_ADVANCED_ROUTER
         select FIB_RULES
         help
           Normally, a multicast router runs a userspace daemon and decides
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 5df5fd74c6d1..7d8a2bcecb76 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -71,6 +71,9 @@
 
 struct mr_table {
         struct list_head        list;
+#ifdef CONFIG_NET_NS
+        struct net              *net;
+#endif
         u32                     id;
         struct sock             *mroute_sk;
         struct timer_list       ipmr_expire_timer;
@@ -308,6 +311,7 @@ static struct mr_table *ipmr_new_table(struct net *net, u32 id)
         mrt = kzalloc(sizeof(*mrt), GFP_KERNEL);
         if (mrt == NULL)
                 return NULL;
+        write_pnet(&mrt->net, net);
         mrt->id = id;
 
         /* Forwarding cache */
@@ -580,7 +584,7 @@ static inline void ipmr_cache_free(struct mfc_cache *c)
 
 static void ipmr_destroy_unres(struct mr_table *mrt, struct mfc_cache *c)
 {
-        struct net *net = NULL; //mrt->net;
+        struct net *net = read_pnet(&mrt->net);
         struct sk_buff *skb;
         struct nlmsgerr *e;
 
@@ -1089,12 +1093,14 @@ static int ipmr_mfc_add(struct net *net, struct mr_table *mrt,
          *      Check to see if we resolved a queued list. If so we
          *      need to send on the frames and tidy up.
          */
+        found = false;
         spin_lock_bh(&mfc_unres_lock);
         list_for_each_entry(uc, &mrt->mfc_unres_queue, list) {
                 if (uc->mfc_origin == c->mfc_origin &&
                     uc->mfc_mcastgrp == c->mfc_mcastgrp) {
                         list_del(&uc->list);
                         atomic_dec(&mrt->cache_resolve_queue_len);
+                        found = true;
                         break;
                 }
         }
@@ -1102,7 +1108,7 @@ static int ipmr_mfc_add(struct net *net, struct mr_table *mrt,
                 del_timer(&mrt->ipmr_expire_timer);
         spin_unlock_bh(&mfc_unres_lock);
 
-        if (uc) {
+        if (found) {
                 ipmr_cache_resolve(net, mrt, uc, c);
                 ipmr_cache_free(uc);
         }