Commit 7281a665 authored by Andrey Vagin's avatar Andrey Vagin Committed by David S. Miller

net: allow to kill a task which waits net_mutex in copy_new_ns

net_mutex can be locked for a long time. It may be because many
namespaces are being destroyed or many processes decide to create
a network namespace.

Both these operations are heavy, so it is better to have an ability to
kill a process which is waiting net_mutex.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: default avatarAndrei Vagin <avagin@openvz.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d65f2fa6
......@@ -379,7 +379,14 @@ struct net *copy_net_ns(unsigned long flags,
get_user_ns(user_ns);
mutex_lock(&net_mutex);
rv = mutex_lock_killable(&net_mutex);
if (rv < 0) {
net_free(net);
dec_net_namespaces(ucounts);
put_user_ns(user_ns);
return ERR_PTR(rv);
}
net->ucounts = ucounts;
rv = setup_net(net, user_ns);
if (rv == 0) {
......
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