From: Jens Axboe <axboe@kernel.dk>
To: Omar Sandoval <osandov@osandov.com>, Jens Axboe <axboe@fb.com>
Cc: Dmitry Vyukov <dvyukov@google.com>,
linux-block@vger.kernel.org, kernel-team@fb.com,
stable@vger.kernel.org
Subject: Re: [PATCH] block: fix use-after-free in sys_ioprio_get()
Date: Fri, 1 Jul 2016 08:39:52 -0600 [thread overview]
Message-ID: <577680B8.4020003@kernel.dk> (raw)
In-Reply-To: <fa9c9a3ee7355f932d4f40322602aae5fb293f97.1467358615.git.osandov@fb.com>
On 07/01/2016 01:39 AM, Omar Sandoval wrote:
> From: Omar Sandoval <osandov@fb.com>
>
> get_task_ioprio() accesses the task->io_context without holding the task
> lock and thus can race with exit_io_context(), leading to a
> use-after-free. The reproducer below hits this within a few seconds on
> my 4-core QEMU VM:
Thanks Omar, applied for this series.
--
Jens Axboe
prev parent reply other threads:[~2016-07-01 14:39 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-01 7:39 [PATCH] block: fix use-after-free in sys_ioprio_get() Omar Sandoval
2016-07-01 14:39 ` Jens Axboe [this message]
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