From: Jens Axboe <axboe@fb.com>
To: Ming Lei <ming.lei@canonical.com>, <linux-kernel@vger.kernel.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Subject: Re: [PATCH] blk-mq: fix hctx/ctx kobject use-after-free
Date: Tue, 20 Jan 2015 12:30:18 -0700 [thread overview]
Message-ID: <54BEACCA.4080800@fb.com> (raw)
In-Reply-To: <1421722856-6346-1-git-send-email-ming.lei@canonical.com>
On 01/19/2015 08:00 PM, Ming Lei wrote:
> The kobject memory shouldn't have been freed before the kobject
> is released because driver core can access it freely before its
> release.
>
> This patch frees hctx in its release callback. For ctx, they
> share one single per-cpu variable which is associated with
> the request queue, so free ctx in q->mq_kobj's release handler.
>
> Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
> (fix ctx kobjects)
> Signed-off-by: Ming Lei <ming.lei@canonical.com>
Thanks Ming, applied.
--
Jens Axboe
prev parent reply other threads:[~2015-01-20 19:30 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-20 3:00 [PATCH] blk-mq: fix hctx/ctx kobject use-after-free Ming Lei
2015-01-20 19:30 ` Jens Axboe [this message]
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