linux-kernel - Re: [PATCH v3] block: fix deadlock between sd_remove & sd

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Message-Id: <172183634626.7375.12424397192746760093.b4-ty@kernel.dk>
Date: Wed, 24 Jul 2024 09:52:26 -0600
From: Jens Axboe <axboe@...nel.dk>
To: Dave Chinner <dchinner@...hat.com>, Jan Kara <jack@...e.cz>, 
 linux-block@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Yang Yang <yang.yang@...o.com>
Cc: stable@...r.kernel.org, Ming Lei <ming.lei@...hat.com>, 
 Bart Van Assche <bvanassche@....org>
Subject: Re: [PATCH v3] block: fix deadlock between sd_remove & sd_release


On Wed, 24 Jul 2024 15:04:12 +0800, Yang Yang wrote:
> Our test report the following hung task:
> 
> [ 2538.459400] INFO: task "kworker/0:0":7 blocked for more than 188 seconds.
> [ 2538.459427] Call trace:
> [ 2538.459430]  __switch_to+0x174/0x338
> [ 2538.459436]  __schedule+0x628/0x9c4
> [ 2538.459442]  schedule+0x7c/0xe8
> [ 2538.459447]  schedule_preempt_disabled+0x24/0x40
> [ 2538.459453]  __mutex_lock+0x3ec/0xf04
> [ 2538.459456]  __mutex_lock_slowpath+0x14/0x24
> [ 2538.459459]  mutex_lock+0x30/0xd8
> [ 2538.459462]  del_gendisk+0xdc/0x350
> [ 2538.459466]  sd_remove+0x30/0x60
> [ 2538.459470]  device_release_driver_internal+0x1c4/0x2c4
> [ 2538.459474]  device_release_driver+0x18/0x28
> [ 2538.459478]  bus_remove_device+0x15c/0x174
> [ 2538.459483]  device_del+0x1d0/0x358
> [ 2538.459488]  __scsi_remove_device+0xa8/0x198
> [ 2538.459493]  scsi_forget_host+0x50/0x70
> [ 2538.459497]  scsi_remove_host+0x80/0x180
> [ 2538.459502]  usb_stor_disconnect+0x68/0xf4
> [ 2538.459506]  usb_unbind_interface+0xd4/0x280
> [ 2538.459510]  device_release_driver_internal+0x1c4/0x2c4
> [ 2538.459514]  device_release_driver+0x18/0x28
> [ 2538.459518]  bus_remove_device+0x15c/0x174
> [ 2538.459523]  device_del+0x1d0/0x358
> [ 2538.459528]  usb_disable_device+0x84/0x194
> [ 2538.459532]  usb_disconnect+0xec/0x300
> [ 2538.459537]  hub_event+0xb80/0x1870
> [ 2538.459541]  process_scheduled_works+0x248/0x4dc
> [ 2538.459545]  worker_thread+0x244/0x334
> [ 2538.459549]  kthread+0x114/0x1bc
> 
> [...]

Applied, thanks!

[1/1] block: fix deadlock between sd_remove & sd_release
      commit: 7e04da2dc7013af50ed3a2beb698d5168d1e594b

Best regards,
-- 
Jens Axboe