Re: [PATCH] pidns: remove recursion from free_pid_ns

[Cyrill Gorcunov]

On Fri, Oct 05, 2012 at 01:21:02AM +0400, Andrew Vagin wrote:
> Here is a stack trace of recursion:
> free_pid_ns(parent)
>   put_pid_ns(parent)
>     kref_put(&ns->kref, free_pid_ns);
>       free_pid_ns
> 
> This patch turns recursion into loops.
> 
> pidns can be nested many times, so in case of recursion
> a simple user space program can provoke a kernel panic
> due to exceed of a kernel stack.

Acked-by: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>

Looks good to me. Thanks Andrew!
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