Re: [PATCH 1/8] stop_machine: cpu_stopper_thread() must check done != NULL

Tejun Heo
2015-11-16T18:52:26Z

On Sun, Nov 15, 2015 at 08:33:11PM +0100, Oleg Nesterov wrote:
> stop_one_cpu_nowait(fn) will crash the kernel if the callback returns
> nonzero, work->done == NULL in this case.
>
> This needs more cleanups, cpu_stop_signal_done() is called right after
> we check done != NULL and it does the same check.
>
> Signed-off-by: Oleg Nesterov <oleg@redhat.com>

Acked-by: Tejun Heo <tj@kernel.org>

cc stable?

Thanks.

--
tejun