INFO: task hung in usb_deregister

INFO: task hung in usb_deregister_dev
Status: upstream: reported on 2020/07/06 15:22
Reported-by: syzbot+4189d5cde8630463053f@syzkaller.appspotmail.com
First crash: 721d, last: 7d09h

Sample crash report:

INFO: task kworker/0:1:2225 blocked for more than 143 seconds.
      Not tainted 5.14.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1     state:D stack:23744 pid: 2225 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 context_switch kernel/sched/core.c:4683 [inline]
 __schedule+0x941/0x22b0 kernel/sched/core.c:5940
 schedule+0xcf/0x270 kernel/sched/core.c:6019
 rwsem_down_write_slowpath+0x8e3/0x1190 kernel/locking/rwsem.c:1106
 __down_write_common kernel/locking/rwsem.c:1261 [inline]
 __down_write_common kernel/locking/rwsem.c:1258 [inline]
 __down_write kernel/locking/rwsem.c:1270 [inline]
 down_write+0x137/0x150 kernel/locking/rwsem.c:1407
 usb_deregister_dev+0xaa/0x320 drivers/usb/core/file.c:239
 sisusb_disconnect+0x5a/0x200 drivers/usb/misc/sisusbvga/sisusb.c:3166
 usb_unbind_interface+0x1d8/0x8d0 drivers/usb/core/driver.c:458
 __device_release_driver+0x3bd/0x6f0 drivers/base/dd.c:1201
 device_release_driver_internal drivers/base/dd.c:1232 [inline]
 device_release_driver+0x26/0x40 drivers/base/dd.c:1255
 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:529
 device_del+0x502/0xd40 drivers/base/core.c:3540
 usb_disable_device+0x35b/0x7b0 drivers/usb/core/message.c:1419
 usb_disconnect.cold+0x27a/0x78e drivers/usb/core/hub.c:2221
 hub_port_connect drivers/usb/core/hub.c:5151 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5440 [inline]
 port_event drivers/usb/core/hub.c:5586 [inline]
 hub_event+0x1c9c/0x4330 drivers/usb/core/hub.c:5668
 process_one_work+0x98d/0x15b0 kernel/workqueue.c:2276
 process_scheduled_works kernel/workqueue.c:2338 [inline]
 worker_thread+0x85c/0x11f0 kernel/workqueue.c:2424
 kthread+0x3c0/0x4a0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295

Showing all locks held in the system:
1 lock held by khungtaskd/1251:
 #0: ffffffff8767e500 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x269 kernel/locking/lockdep.c:6446
1 lock held by in:imklog/4301:
 #0: ffff8881035a8370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:974
6 locks held by kworker/0:1/2225:
 #0: ffff88810a2a5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff88810a2a5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:620 [inline]
 #0: ffff88810a2a5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline]
 #0: ffff88810a2a5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline]
 #0: ffff88810a2a5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline]
 #0: ffff88810a2a5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x871/0x15b0 kernel/workqueue.c:2247
 #1: ffffc90012e3fdb0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15b0 kernel/workqueue.c:2251
 #2: ffff88810f989220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:754 [inline]
 #2: ffff88810f989220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4330 drivers/usb/core/hub.c:5614
 #3: ffff888119125220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:754 [inline]
 #3: ffff888119125220 (&dev->mutex){....}-{3:3}, at: usb_disconnect.cold+0x43/0x78e drivers/usb/core/hub.c:2212
 #4: ffff8881150ab1a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:754 [inline]
 #4: ffff8881150ab1a8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1028 [inline]
 #4: ffff8881150ab1a8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal drivers/base/dd.c:1229 [inline]
 #4: ffff8881150ab1a8 (&dev->mutex){....}-{3:3}, at: device_release_driver+0x1c/0x40 drivers/base/dd.c:1255
 #5: ffffffff87f79730 (minor_rwsem){++++}-{3:3}, at: usb_deregister_dev+0xaa/0x320 drivers/usb/core/file.c:239
2 locks held by syz-executor.5/1014:
 #0: ffffffff87f79730 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39
 #1: ffff88813f57f0d0 (&(sisusb->lock)){+.+.}-{3:3}, at: sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusb.c:2396

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 1251 Comm: khungtaskd Not tainted 5.14.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:105
 nmi_cpu_backtrace.cold+0x46/0xe0 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1da/0x200 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
 watchdog+0xcf4/0xf90 kernel/hung_task.c:295
 kthread+0x3c0/0x4a0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:109 [inline]
NMI backtrace for cpu 0 skipped: idling at acpi_idle_do_entry+0x1c6/0x250 drivers/acpi/processor_idle.c:553

Crashes (180):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci2-upstream-usb	2021/07/25 01:12	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	8e6cb5d27e82	4d1b57d4	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/07/24 15:23	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	8e6cb5d27e82	4d1b57d4	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/07/15 18:33	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	97db1b081e12	f115ae98	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/06/10 07:48	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e89bb4288378	1ba81399	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/06/08 16:26	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	87191ca9f902	5c2fe346	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/06/03 04:05	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	5ff90af9da8f	0740de69	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/06/01 17:49	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	aa10fab0f859	032639db	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/06/01 15:46	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	aa10fab0f859	032639db	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/05/31 23:45	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	aa10fab0f859	032639db	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/05/30 07:22	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	7652dd2c5cb7	325a8dab	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/05/29 00:52	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	7652dd2c5cb7	858ea628	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/05/22 15:48	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	7257fbc7c598	3c7fef33	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/05/22 05:39	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	7257fbc7c598	3c7fef33	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/05/15 20:15	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	216e0e563d81	93f844de	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/05/14 01:05	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	216e0e563d81	ecb594cb	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/05/13 17:32	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	216e0e563d81	ecb594cb	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/05/12 01:14	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	4676be28a46e	b3c3bb8e	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/05/11 19:51	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	4676be28a46e	b3c3bb8e	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/05/08 14:20	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	31a8503589c4	bc5434be	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/05/06 03:55	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	d665ea6ea86c	06c27ff5	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/04/27 02:39	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	caa93d9bd2d7	8ee2dea6	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/04/26 23:17	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	caa93d9bd2d7	8ee2dea6	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/04/25 02:45	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	caa93d9bd2d7	17f0b706	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/04/24 06:49	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	ddae7979cdd5	17f0b706	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/04/20 23:56	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	4b853c236c7b	c0ced557	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/04/20 05:22	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	4b853c236c7b	4285c989	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/04/19 05:40	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	4b853c236c7b	7e2b734b	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/04/18 09:16	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	4b853c236c7b	7e2b734b	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/04/17 05:17	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	4b853c236c7b	7e2b734b	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/04/11 07:40	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	3db53374405f	6a81331a	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/04/10 11:14	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	496960274153	6a81331a	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/04/05 03:47	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	bee1f89aad2a	6a81331a	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/04/03 14:11	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	bee1f89aad2a	6a81331a	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/04/02 06:33	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e5242861ec6a	6a81331a	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/03/31 14:25	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	e5242861ec6a	6a81331a	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/03/23 00:57	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	f85142af3641	8092f30d	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/03/13 08:24	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	14b02f023c09	4a003785	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/03/10 04:35	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	bebccc4bc658	26967e35	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/03/04 22:22	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	5e17812c22bc	f89ed068	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/03/01 15:30	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	fe07bfda2fb9	4c37c133	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/03/01 13:09	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	fe07bfda2fb9	4c37c133	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/02/25 07:53	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	3b9cdafb5358	fcc6d71b	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/02/24 10:54	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	3b9cdafb5358	fcc6d71b	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/02/22 00:55	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	55f62bc87347	a659b3f1	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/02/20 16:53	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	b5a12546e779	3e5ed8b4	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/02/16 09:02	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	b5a12546e779	98682e5e	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/02/15 19:23	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	b5a12546e779	98682e5e	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/02/09 15:58	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	4b049f55ed95	2bd9619f	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/02/09 11:22	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	4b049f55ed95	2bd9619f	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/01/31 11:30	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	3c648d3deb0f	fc9fd31e	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/01/26 22:06	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	7a35a5ca2637	55a7d4df	.config	log	report	info	INFO: task hung in usb_deregister_dev
ci2-upstream-usb	2021/01/09 20:51	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	841081d89d5a	a6c52263	.config	log	report	info
ci2-upstream-usb	2020/07/05 00:56	https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing	768a07412843	24d7f505	.config	log	report
ci2-upstream-usb	2019/08/11 00:40	https://github.com/google/kasan.git usb-fuzzer	e96407b49762	acb51638	.config	log	report