Commit 310928d9 authored Oct 30, 2007 by Daniel Lezcano Committed by David S. Miller Oct 30, 2007

[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>

parent 93ee31f1

net/core/net_namespace.c

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -112,6 +112,8 @@ static int setup_net(struct net *net)
	if (ops->exit)		if (ops->exit)
	ops->exit(net);		ops->exit(net);
	}		}

			rcu_barrier();
	goto out;		goto out;
	}		}