diff options
Diffstat (limited to 'net/netlink/af_netlink.c')
| -rw-r--r-- | net/netlink/af_netlink.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index 626a58206298..6b178e1247b5 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -1396,6 +1396,9 @@ netlink_kernel_create(struct net *net, int unit, unsigned int groups, } netlink_table_ungrab(); + /* Do not hold an extra referrence to a namespace as this socket is + * internal to a namespace and does not prevent it to stop. */ + put_net(net); return sk; out_sock_release: @@ -1411,7 +1414,19 @@ netlink_kernel_release(struct sock *sk) { if (sk == NULL || sk->sk_socket == NULL) return; + + /* + * Last sock_put should drop referrence to sk->sk_net. It has already + * been dropped in netlink_kernel_create. Taking referrence to stopping + * namespace is not an option. + * Take referrence to a socket to remove it from netlink lookup table + * _alive_ and after that destroy it in the context of init_net. + */ + sock_hold(sk); sock_release(sk->sk_socket); + + sk->sk_net = get_net(&init_net); + sock_put(sk); } EXPORT_SYMBOL(netlink_kernel_release); |