INFO: task kworker/1:20:6020 blocked for more than 143 seconds.
      Not tainted 6.0.0-rc2-syzkaller-00044-gdf0219d11b6f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:20    state:D stack:20696 pid: 6020 ppid:     2 flags:0x00004000
Workqueue: usb_hub_wq hub_event
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5182 [inline]
 __schedule+0x957/0xe20 kernel/sched/core.c:6494
 schedule+0xcb/0x190 kernel/sched/core.c:6570
 scsi_remove_host+0x395/0x910 drivers/scsi/hosts.c:199
 quiesce_and_remove_host drivers/usb/storage/usb.c:867 [inline]
 usb_stor_disconnect+0x14e/0x1f0 drivers/usb/storage/usb.c:1087
 usb_unbind_interface+0x1f2/0x860 drivers/usb/core/driver.c:458
 device_remove drivers/base/dd.c:520 [inline]
 __device_release_driver drivers/base/dd.c:1209 [inline]
 device_release_driver_internal+0x5bc/0x8a0 drivers/base/dd.c:1235
 bus_remove_device+0x2fd/0x410 drivers/base/bus.c:529
 device_del+0x6ec/0xbe0 drivers/base/core.c:3704
 usb_disable_device+0x3dd/0x820 drivers/usb/core/message.c:1419
 usb_disconnect+0x346/0x890 drivers/usb/core/hub.c:2235
 hub_port_connect+0x296/0x2930 drivers/usb/core/hub.c:5197
 hub_port_connect_change+0x619/0xbe0 drivers/usb/core/hub.c:5497
 port_event+0xec6/0x13b0 drivers/usb/core/hub.c:5653
 hub_event+0x5c1/0xd80 drivers/usb/core/hub.c:5735
 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289
 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8cd20970 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8cd21170 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
 #0: ffffffff8cd207a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3282:
 #0: ffff888027ad7098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
 #1: ffffc90002d232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6e8/0x1e50 drivers/tty/n_tty.c:2177
5 locks held by kworker/1:20/6020:
 #0: ffff8880180de938 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x796/0xd10 kernel/workqueue.c:2262
 #1: ffffc9000305fd00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7d0/0xd10 kernel/workqueue.c:2264
 #2: ffff888147c2f190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
 #2: ffff888147c2f190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bb/0xd80 drivers/usb/core/hub.c:5681
 #3: ffff88807b045190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
 #3: ffff88807b045190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0xff/0x890 drivers/usb/core/hub.c:2226
 #4: ffff88807b042118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
 #4: ffff88807b042118 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1038 [inline]
 #4: ffff88807b042118 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xb5/0x8a0 drivers/base/dd.c:1232
3 locks held by udevd/23766:
 #0: ffff888059303888 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:253 [inline]
 #0: ffff888059303888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x1a5/0x650 fs/kernfs/file.c:300
 #1: ffff888060f3c2c0 (kn->active#86){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:254 [inline]
 #1: ffff888060f3c2c0 (kn->active#86){++++}-{0:0}, at: kernfs_fop_read_iter+0x1bc/0x650 fs/kernfs/file.c:300
 #2: ffff88807b045190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:840 [inline]
 #2: ffff88807b045190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x30/0x390 drivers/usb/core/sysfs.c:873
1 lock held by syz-executor.1/25328:
 #0: ffff888147c2f190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline]
 #0: ffff888147c2f190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x153/0x780 drivers/usb/core/devio.c:1042
1 lock held by syz-executor.1/25874:

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

NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc2-syzkaller-00044-gdf0219d11b6f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 nmi_cpu_backtrace+0x47c/0x4b0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x169/0x280 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
 watchdog+0xcd5/0xd20 kernel/hung_task.c:369
 kthread+0x266/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 15972 Comm: syz-executor.2 Not tainted 6.0.0-rc2-syzkaller-00044-gdf0219d11b6f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:check_kcov_mode kernel/kcov.c:177 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x33/0x60 kernel/kcov.c:200
Code: 00 6f 02 00 65 8b 15 84 d6 78 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 bc 15 00 00 00 74 2c 8b 91 98 15 00 00 <83> fa 02 75 21 48 8b 91 a0 15 00 00 48 8b 32 48 8d 7e 01 8b 89 9c
RSP: 0018:ffffc9001135f3d8 EFLAGS: 00000246
RAX: ffffffff81c916c5 RBX: 0000000000000000 RCX: ffff888020cb5880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9001135f4c8 R08: ffffffff81c916b6 R09: fffff940003a5a27
R10: fffff940003a5a27 R11: 1ffffd40003a5a26 R12: dffffc0000000000
R13: 8000000074b44007 R14: ffffea0001d2d100 R15: ffff88805c67d498
FS:  0000555557458400(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa82f8d53a5 CR3: 0000000020f8a000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 mm_counter include/linux/mm.h:1997 [inline]
 copy_present_pte+0x2c5/0x1120 mm/memory.c:970
 copy_pte_range mm/memory.c:1085 [inline]
 copy_pmd_range mm/memory.c:1171 [inline]
 copy_pud_range mm/memory.c:1208 [inline]
 copy_p4d_range+0xe72/0x22a0 mm/memory.c:1232
 copy_page_range+0x527/0x7f0 mm/memory.c:1330
 dup_mmap+0x9e9/0xfc0 kernel/fork.c:699
 dup_mm+0x8c/0x310 kernel/fork.c:1524
 copy_mm+0x102/0x190 kernel/fork.c:1576
 copy_process+0x1a15/0x4010 kernel/fork.c:2256
 kernel_clone+0x22f/0x7a0 kernel/fork.c:2673
 __do_sys_clone kernel/fork.c:2807 [inline]
 __se_sys_clone kernel/fork.c:2791 [inline]
 __x64_sys_clone+0x276/0x2e0 kernel/fork.c:2791
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa82e88786b
Code: ed 0f 85 60 01 00 00 64 4c 8b 0c 25 10 00 00 00 45 31 c0 4d 8d 91 d0 02 00 00 31 d2 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 89 00 00 00 41 89 c5 85 c0 0f 85 90 00 00
RSP: 002b:00007fffe7ae9d30 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa82e88786b
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000555557458400
R10: 00005555574586d0 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007fffe7ae9e10
 </TASK>