INFO: task syz-executor.2:21274 blocked for more than 145 seconds.
      Not tainted 6.1.16-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:26792 pid:21274 ppid:3683   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5238 [inline]
 __schedule+0x1391/0x4390 kernel/sched/core.c:6551
 schedule+0xbf/0x180 kernel/sched/core.c:6627
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6686
 rwsem_down_read_slowpath+0x5f0/0x940 kernel/locking/rwsem.c:1094
 __down_read_common+0x61/0x2c0 kernel/locking/rwsem.c:1261
 iterate_supers+0xac/0x1e0 fs/super.c:735
 ksys_sync+0xb9/0x1c0 fs/sync.c:102
 __do_sys_sync+0xa/0x10 fs/sync.c:113
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f003ca8c0f9
RSP: 002b:00007f003d7a1168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f003cbabf80 RCX: 00007f003ca8c0f9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f003cae7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd1ca7958f R14: 00007f003d7a1300 R15: 0000000000022000
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8cf27470 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8cf27c70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
 #0: ffffffff8cf272a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3316:
 #0: ffff88814aa53098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
 #1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2177
2 locks held by kworker/0:7/3743:
 #0: ffff888012466538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x77b/0x1380
 #1: ffffc90004f57d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7be/0x1380 kernel/workqueue.c:2264
6 locks held by kworker/1:8/3762:
 #0: ffff888145c3b138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x77b/0x1380
 #1: ffffc90004f27d20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7be/0x1380 kernel/workqueue.c:2264
 #2: ffff888022528190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:836 [inline]
 #2: ffff888022528190 (&dev->mutex){....}-{3:3}, at: hub_event+0x20e/0x57b0 drivers/usb/core/hub.c:5683
 #3: ffff88802a1a3190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:836 [inline]
 #3: ffff88802a1a3190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x570 drivers/base/dd.c:983
 #4: ffff88802a1a6118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:836 [inline]
 #4: ffff88802a1a6118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x8a/0x570 drivers/base/dd.c:983
 #5: ffffffff8e031168 (register_mutex#6){+.+.}-{3:3}, at: usb_audio_probe+0x410/0x2090 sound/usb/card.c:800
6 locks held by syz-executor.3/11605:
3 locks held by kworker/0:3/19914:
 #0: ffff888012464d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x77b/0x1380
 #1: ffffc90016e8fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7be/0x1380 kernel/workqueue.c:2264
 #2: ffffffff8cf2c878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
 #2: ffffffff8cf2c878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3b0/0x8a0 kernel/rcu/tree_exp.h:948
1 lock held by syz-executor.2/21274:
 #0: ffff88807d6820e0 (&type->s_umount_key#56){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:735
5 locks held by kworker/u4:9/22189:
4 locks held by udevd/22209:
 #0: ffff888078922d58 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xae/0xd10 fs/seq_file.c:182
 #1: ffff8880770a1488 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x4f/0x3a0 fs/kernfs/file.c:150
 #2: ffff8880827e32c0 (kn->active#30){.+.+}-{0:0}, at: kernfs_seq_start+0x6e/0x3a0 fs/kernfs/file.c:151
 #3: ffff88802a1a3190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:841 [inline]
 #3: ffff88802a1a3190 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x22/0x90 drivers/usb/core/sysfs.c:141

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

NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.16-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x1b0/0x3f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
 watchdog+0xff3/0x1040 kernel/hung_task.c:377
 kthread+0x268/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3762 Comm: kworker/1:8 Not tainted 6.1.16-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: usb_hub_wq hub_event
RIP: 0010:format_decode+0xec1/0x1f10
Code: 48 8b 44 24 18 4c 89 28 8b 44 24 48 0f b6 d8 48 89 df 48 c7 c6 60 2e 3c 8e e8 eb 44 06 f7 83 c3 b8 83 fb 32 0f 87 3d 01 00 00 <ff> 24 dd f8 e5 06 8c e8 73 40 06 f7 48 ba 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90004f26200 EFLAGS: 00000283
RAX: 0000000000000002 RBX: 0000000000000024 RCX: 000000000000008b
RDX: 0000000000000006 RSI: ffffffff8e3c2e60 RDI: 000000000000006c
RBP: ffffc90004f262f0 R08: 0000000000000001 R09: ffffffff8a842095
R10: 0000000000000006 R11: ffff888027773a80 R12: ffff000000000500
R13: ffff000000000500 R14: ffffffff8aec99c4 R15: 1ffffffff15d9338
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30e21000 CR3: 000000001915f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 vsnprintf+0x14d/0x1c70 lib/vsprintf.c:2752
 sprintf+0xd6/0x120 lib/vsprintf.c:3004
 print_time kernel/printk/printk.c:1274 [inline]
 info_print_prefix+0x167/0x300 kernel/printk/printk.c:1300
 record_print_text kernel/printk/printk.c:1349 [inline]
 console_emit_next_record+0x6e2/0xda0 kernel/printk/printk.c:2714
 console_unlock+0x278/0x6e0 kernel/printk/printk.c:2860
 vprintk_emit+0xd1/0x1f0 kernel/printk/printk.c:2268
 dev_vprintk_emit+0x2aa/0x323 drivers/base/core.c:4884
 dev_printk_emit+0xd9/0x118 drivers/base/core.c:4895
 _dev_err+0x11e/0x165 drivers/base/core.c:4950
 snd_usb_create_streams sound/usb/card.c:282 [inline]
 usb_audio_probe+0x106d/0x2090 sound/usb/card.c:880
 usb_probe_interface+0x5c0/0xaf0 drivers/usb/core/driver.c:396
 really_probe+0x2ab/0xcb0 drivers/base/dd.c:639
 __driver_probe_device+0x1c3/0x3f0 drivers/base/dd.c:778
 driver_probe_device+0x50/0x420 drivers/base/dd.c:808
 __device_attach_driver+0x2cf/0x510 drivers/base/dd.c:936
 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
 __device_attach+0x359/0x570 drivers/base/dd.c:1008
 bus_probe_device+0xba/0x1e0 drivers/base/bus.c:487
 device_add+0xb48/0xfd0 drivers/base/core.c:3664
 usb_set_configuration+0x19dd/0x2020 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0x84/0x140 drivers/usb/core/generic.c:238
 usb_probe_device+0x130/0x260 drivers/usb/core/driver.c:293
 really_probe+0x2ab/0xcb0 drivers/base/dd.c:639
 __driver_probe_device+0x1c3/0x3f0 drivers/base/dd.c:778
 driver_probe_device+0x50/0x420 drivers/base/dd.c:808
 __device_attach_driver+0x2cf/0x510 drivers/base/dd.c:936
 bus_for_each_drv+0x183/0x200 drivers/base/bus.c:427
 __device_attach+0x359/0x570 drivers/base/dd.c:1008
 bus_probe_device+0xba/0x1e0 drivers/base/bus.c:487
 device_add+0xb48/0xfd0 drivers/base/core.c:3664
 usb_new_device+0xbdd/0x18e0 drivers/usb/core/hub.c:2575
 hub_port_connect drivers/usb/core/hub.c:5355 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5499 [inline]
 port_event drivers/usb/core/hub.c:5655 [inline]
 hub_event+0x2d4d/0x57b0 drivers/usb/core/hub.c:5737
 process_one_work+0x909/0x1380 kernel/workqueue.c:2289
 worker_thread+0xa5f/0x1210 kernel/workqueue.c:2436
 kthread+0x268/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>