linux-kernel - Re: [PATCH] blk-mq-sched: Don't reference queue tagset in blk_mq_sched_tags

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Message-Id: <163491578487.92334.5273496329606212281.b4-ty@kernel.dk>
Date:   Fri, 22 Oct 2021 09:16:24 -0600
From:   Jens Axboe <axboe@...nel.dk>
To:     John Garry <john.garry@...wei.com>
Cc:     ming.lei@...hat.com, anders.roxell@...aro.org,
        naresh.kamboju@...aro.org, linux-block@...r.kernel.org,
        arnd@...db.de, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] blk-mq-sched: Don't reference queue tagset in blk_mq_sched_tags_teardown()

On Fri, 22 Oct 2021 16:12:20 +0800, John Garry wrote:
> We should not reference the queue tagset in blk_mq_sched_tags_teardown()
> (see function comment) for the blk-mq flags, so use the passed flags
> instead.
> 
> This solves a use-after-free, similarly fixed earlier (and since broken
> again) in commit f0c1c4d2864e ("blk-mq: fix use-after-free in
> blk_mq_exit_sched").
> 
> [...]

Applied, thanks!

[1/1] blk-mq-sched: Don't reference queue tagset in blk_mq_sched_tags_teardown()
      commit: 8bdf7b3fe1f48a2c1c212d4685903bba01409c0e

Best regards,
-- 
Jens Axboe