linux-kernel - Re: [PATCH v2] null_blk: fix null-ptr-dereference while configuring 'power' and 'submit

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Message-Id: <171665337969.160479.8933222085761129078.b4-ty@kernel.dk>
Date: Sat, 25 May 2024 10:09:39 -0600
From: Jens Axboe <axboe@...nel.dk>
To: yi.zhang@...hat.com, dlemoal@...nel.org, hare@...e.de, 
 johannes.thumshirn@....com, kch@...dia.com, zhouchengming@...edance.com, 
 yanjun.zhu@...ux.dev, bvanassche@....org, Yu Kuai <yukuai1@...weicloud.com>
Cc: linux-block@...r.kernel.org, linux-kernel@...r.kernel.org, 
 yukuai3@...wei.com, yi.zhang@...wei.com, yangerkun@...wei.com
Subject: Re: [PATCH v2] null_blk: fix null-ptr-dereference while
 configuring 'power' and 'submit_queues'


On Thu, 23 May 2024 23:39:34 +0800, Yu Kuai wrote:
> Writing 'power' and 'submit_queues' concurrently will trigger kernel
> panic:
> 
> Test script:
> 
> modprobe null_blk nr_devices=0
> mkdir -p /sys/kernel/config/nullb/nullb0
> while true; do echo 1 > submit_queues; echo 4 > submit_queues; done &
> while true; do echo 1 > power; echo 0 > power; done
> 
> [...]

Applied, thanks!

[1/1] null_blk: fix null-ptr-dereference while configuring 'power' and 'submit_queues'
      commit: a2db328b0839312c169eb42746ec46fc1ab53ed2

Best regards,
-- 
Jens Axboe