From: Oleg Nesterov <oleg@redhat.com>
To: Vegard Nossum <vegard.nossum@oracle.com>
Cc: linux-kernel@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Jamie Iles <jamie.iles@oracle.com>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Andy Lutomirski <luto@kernel.org>
Subject: Re: [PATCH v2] kthread: fix use-after-free if kthread fork fails
Date: Wed, 10 May 2017 16:02:33 +0200 [thread overview]
Message-ID: <20170510140232.GA7500@redhat.com> (raw)
In-Reply-To: <20170509073959.17858-1-vegard.nossum@oracle.com>
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>
next prev parent reply other threads:[~2017-05-10 14:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-09 7:39 [PATCH v2] kthread: fix use-after-free if kthread fork fails Vegard Nossum
2017-05-10 14:02 ` Oleg Nesterov [this message]
2017-05-22 20:24 ` [tip:core/urgent] kthread: Fix " tip-bot for Vegard Nossum
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