Re: [PATCH v2] kthread: fix use-after-free if kthread fork fails

From	Oleg Nesterov <oleg@redhat.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v2] kthread: fix use-after-free if kthread fork fails
Date	2017-05-10 16:10 +0200
Message-ID	<tFAts-1IC-5@gated-at.bofh.it> (permalink)
References	<tF849-77W-3@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 05/09, Vegard Nossum wrote:
>
> If a kthread forks (e.g. usermodehelper since commit 1da5c46fa965) but
> fails in copy_process() between calling dup_task_struct() and setting
> p->set_child_tid, then the value of p->set_child_tid will be inherited
> from the parent and get prematurely freed by free_kthread_struct().

Thanks,

Acked-by: Oleg Nesterov <oleg@redhat.com>

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[PATCH v2] kthread: fix use-after-free if kthread fork fails Vegard Nossum <vegard.nossum@oracle.com> - 2017-05-09 09:50 +0200
  Re: [PATCH v2] kthread: fix use-after-free if kthread fork fails Oleg Nesterov <oleg@redhat.com> - 2017-05-10 16:10 +0200

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