linux-kernel - [-next] BUG_ON in scsi_target

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Message-ID: <20160411090146.GA537@swordfish>
Date:	Mon, 11 Apr 2016 18:01:47 +0900
From:	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:	Johannes Thumshirn <jthumshirn@...e.de>
Cc:	"Ewan D. Milne" <emilne@...hat.com>,
	Hannes Reinecke <hare@...e.com>,
	James Bottomley <jejb@...ux.vnet.ibm.com>,
	"Martin K. Petersen" <martin.petersen@...cle.com>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org, linux-next@...r.kernel.org,
	Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
	Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: [-next] BUG_ON in scsi_target_destroy()

Hello,

commit 7b106f2de6938c31ce5e9c86bc70ad3904666b96
Author: Johannes Thumshirn <jthumshirn@...e.de>
Date:   Tue Apr 5 11:50:44 2016 +0200

    scsi: Add intermediate STARGET_REMOVE state to scsi_target_state


BUG_ON()s (next-20160411) each time I remove a usb flash

[   49.561600]  [<ffffffffa0087f42>] scsi_target_destroy+0x5a/0xcb [scsi_mod]
[   49.561607]  [<ffffffffa0089099>] scsi_target_reap+0x4a/0x4f [scsi_mod]
[   49.561613]  [<ffffffffa008b453>] __scsi_remove_device+0xc3/0xd0 [scsi_mod]
[   49.561619]  [<ffffffffa0089d7b>] scsi_forget_host+0x52/0x63 [scsi_mod]
[   49.561623]  [<ffffffffa0080dbc>] scsi_remove_host+0x8c/0x102 [scsi_mod]
[   49.561627]  [<ffffffffa015c447>] usb_stor_disconnect+0x6b/0xab [usb_storage]
[   49.561634]  [<ffffffffa0013f73>] usb_unbind_interface+0x77/0x1ca [usbcore]
[   49.561636]  [<ffffffff813ae064>] __device_release_driver+0x9d/0x121
[   49.561638]  [<ffffffff813ae10b>] device_release_driver+0x23/0x30
[   49.561639]  [<ffffffff813ad2d1>] bus_remove_device+0xfb/0x10e
[   49.561641]  [<ffffffff813aac05>] device_del+0x164/0x1e6
[   49.561648]  [<ffffffffa0011b09>] ? remove_intf_ep_devs+0x3b/0x48 [usbcore]
[   49.561655]  [<ffffffffa001200e>] usb_disable_device+0x84/0x1a5 [usbcore]
[   49.561661]  [<ffffffffa000ac7b>] usb_disconnect+0x94/0x19f [usbcore]
[   49.561667]  [<ffffffffa000c2ab>] hub_event+0x5c1/0xdea [usbcore]
[   49.561670]  [<ffffffff810530b1>] process_one_work+0x1dc/0x37f
[   49.561672]  [<ffffffff81053dc5>] worker_thread+0x282/0x36d
[   49.561673]  [<ffffffff81053b43>] ? rescuer_thread+0x2ae/0x2ae
[   49.561675]  [<ffffffff810580a8>] kthread+0xd2/0xda
[   49.561678]  [<ffffffff814bbf92>] ret_from_fork+0x22/0x40
[   49.561679]  [<ffffffff81057fd6>] ? kthread_worker_fn+0x13e/0x13e

	-ss