[NETNS]: icmp(v6)_sk should not pin a namespace.

So, change icmp(v6)_sk creation/disposal to the scheme used in the
netlink for rtnl, i.e. create a socket in the context of the init_net
and assign the namespace without getting a referrence later.

Also use sk_release_kernel instead of sock_release to properly destroy
such sockets.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Acked-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 7c62a0d..97d97ad 100644 (file)
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -1146,14 +1146,8 @@ static void __exit icmp_exit(void)
 {
        int i;
 
-       for_each_possible_cpu(i) {
-               struct sock *sk;
-
-               sk = __icmp_sk[i];
-               if (sk == NULL)
-                       continue;
-               sock_release(sk->sk_socket);
-       }
+       for_each_possible_cpu(i)
+               sk_release_kernel(__icmp_sk[i]);
        kfree(__icmp_sk);
        __icmp_sk = NULL;
 }
@@ -1176,6 +1170,8 @@ int __init icmp_init(void)
                        goto fail;
 
                __icmp_sk[i] = sk = sock->sk;
+               sk_change_net(sk, &init_net);
+
                sk->sk_allocation = GFP_ATOMIC;
 
                /* Enough space for 2 64K ICMP packets, including

diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 3368f32..3eb594d 100644 (file)
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -802,6 +802,8 @@ int __init icmpv6_init(void)
                }
 
                __icmpv6_sk[i] = sk = sock->sk;
+               sk_change_net(sk, &init_net);
+
                sk->sk_allocation = GFP_ATOMIC;
                /*
                 * Split off their lock-class, because sk->sk_dst_lock
@@ -831,11 +833,8 @@ int __init icmpv6_init(void)
        return 0;
 
  fail:
-       for (j = 0; j < i; j++) {
-               if (!cpu_possible(j))
-                       continue;
-               sock_release(__icmpv6_sk[j]->sk_socket);
-       }
+       for (j = 0; j < i; j++)
+               sk_release_kernel(__icmpv6_sk[j]);
 
        return err;
 }
@@ -845,7 +844,7 @@ void icmpv6_cleanup(void)
        int i;
 
        for_each_possible_cpu(i) {
-               sock_release(__icmpv6_sk[i]->sk_socket);
+               sk_release_kernel(__icmpv6_sk[i]);
        }
        inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6);
 }