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 <[EMAIL PROTECTED]>
---
net/core/net_namespace.c | 2 ++
1 file changed, 2 insertions(+)
Index: net-2.6/net/core/net_namespace.c
===================================================================
--- net-2.6.orig/net/core/net_namespace.c
+++ net-2.6/net/core/net_namespace.c
@@ -112,6 +112,8 @@ out_undo:
if (ops->exit)
ops->exit(net);
}
+
+ rcu_barrier();
goto out;
}
-
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