tree e07712c96ef555b73d9d93b749056ddd053b86c8
parent 93ee31f14f6f7b5b427c2fdc715d5571eb0be9e5
author Daniel Lezcano <dlezcano@fr.ibm.com> 1193783937 -0700
committer David S. Miller <davem@sunset.davemloft.net> 1193804181 -0700

[NETNS]: fix net released by rcu callback

When a network namespace reference is held by a network subsystem,
and when this reference is decremented in a rcu update callback, we
must ensure that there is no more outstanding rcu update before
trying to free the network namespace.

In the normal case, the rcu_barrier is called when the network namespace
is exiting in the cleanup_net function.

But when a network namespace creation fails, and the subsystems are
undone (like the cleanup), the rcu_barrier is missing.

This patch adds the missing rcu_barrier.

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