INFO: task syz-executor.3:776 blocked for more than 143 seconds.
      Not tainted 6.1.77-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:27560 pid:776   ppid:3583   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b9/0xd80 kernel/locking/mutex.c:747
 blkdev_put+0x100/0x750 block/bdev.c:913
 blkdev_close+0x56/0x80 block/fops.c:514
 __fput+0x3b7/0x890 fs/file_table.c:320
 task_work_run+0x246/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f841f47dda9
RSP: 002b:00007f84201f10c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f841f5abf80 RCX: 00007f841f47dda9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007f841f4ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f841f5abf80 R15: 00007fffa20450e8
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8d12a910 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8d12b110 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/28:
 #0: ffffffff8d12a740 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:318 [inline]
 #0: ffffffff8d12a740 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:759 [inline]
 #0: ffffffff8d12a740 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6494
2 locks held by getty/3305:
 #0: ffff88814b399098 (&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:2188
1 lock held by syz-executor.2/3585:
 #0: ffffffff8d12fd38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
 #0: ffffffff8d12fd38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3b0/0x8a0 kernel/rcu/tree_exp.h:949
2 locks held by kworker/0:4/3621:
 #0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
 #1: ffffc9000495fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
1 lock held by udevd/3743:
 #0: ffff88801fe974c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x148/0xa10 block/bdev.c:815
3 locks held by kworker/0:3/21003:
 #0: ffff88814529c138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
 #1: ffffc900032bfd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
 #2: ffff8880229cf190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:836 [inline]
 #2: ffff8880229cf190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x5730 drivers/usb/core/hub.c:5772
1 lock held by syz-executor.3/776:
 #0: ffff88801fe974c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x100/0x750 block/bdev.c:913
1 lock held by syz-executor.3/968:
 #0: ffffffff8d12fd38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
 #0: ffffffff8d12fd38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x479/0x8a0 kernel/rcu/tree_exp.h:949
1 lock held by syz-executor.4/2634:
 #0: ffff88801fe974c8 (&disk->open_mutex){+.+.}-{3:3}, at: sync_bdevs+0x1a5/0x320 block/bdev.c:1054

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.77-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
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+0xf88/0xfd0 kernel/hung_task.c:377
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 21003 Comm: kworker/0:3 Not tainted 6.1.77-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: usb_hub_wq hub_event
RIP: 0010:__rb_insert lib/rbtree.c:177 [inline]
RIP: 0010:rb_insert_color+0x2d9/0x620 lib/rbtree.c:436
Code: df e8 6b ee 5d f7 4c 8b 2b 49 89 ee 49 8d 6f 10 48 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 ef e8 cb ee 5d f7 4c 89 6d 00 <49> 8d 6e 08 48 89 e8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 ef e8
RSP: 0018:ffffc90000007988 EFLAGS: 00000046
RAX: 1ffff1100f597a84 RBX: ffff88801b3a3818 RCX: 0000000000000000
RDX: 0000000000000010 RSI: ffff8880b9839f00 RDI: ffff88801b3a3810
RBP: ffff88807acbd420 R08: dffffc0000000000 R09: ffff88801b3a3818
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff88801b3a3810 R15: ffff88807acbd410
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f27f741e000 CR3: 000000008f345000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 rb_insert_color_cached include/linux/rbtree.h:114 [inline]
 rb_add_cached include/linux/rbtree.h:183 [inline]
 __enqueue_entity kernel/sched/fair.c:630 [inline]
 enqueue_entity+0xb2d/0x1770 kernel/sched/fair.c:4786
 enqueue_task_fair+0x23b/0xb90 kernel/sched/fair.c:6099
 enqueue_task+0x181/0x3a0 kernel/sched/core.c:2060
 activate_task kernel/sched/core.c:2088 [inline]
 ttwu_do_activate+0x1b4/0x370 kernel/sched/core.c:3700
 ttwu_queue kernel/sched/core.c:3905 [inline]
 try_to_wake_up+0x76b/0x12e0 kernel/sched/core.c:4228
 hrtimer_wakeup+0x5e/0x70 kernel/time/hrtimer.c:1939
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1749
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1811
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1919 [inline]
RIP: 0010:vprintk_emit+0x501/0x740 kernel/printk/printk.c:2267
Code: 21 e3 0f 85 a6 01 00 00 e8 cc 9a 1c 00 44 8b 24 24 4d 85 ff 75 07 e8 be 9a 1c 00 eb 06 e8 b7 9a 1c 00 fb 48 c7 c7 40 69 00 8d <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 41 56 e8 b6
RSP: 0018:ffffc900032bf360 EFLAGS: 00000283
RAX: ffffffff816de069 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc90012581000 RSI: 000000000003b250 RDI: ffffffff8d006940
RBP: ffffc900032bf450 R08: ffffffff816de046 R09: fffffbfff2092252
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000015
R13: dffffc0000000000 R14: ffffffff816ddeb0 R15: 0000000000000200
 dev_vprintk_emit+0x2aa/0x323 drivers/base/core.c:4895
 dev_printk_emit+0xd9/0x118 drivers/base/core.c:4906
 _dev_info+0x11e/0x165 drivers/base/core.c:4964
 show_string drivers/usb/core/hub.c:2311 [inline]
 announce_device drivers/usb/core/hub.c:2328 [inline]
 usb_new_device+0xfe1/0x18e0 drivers/usb/core/hub.c:2578
 hub_port_connect drivers/usb/core/hub.c:5448 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5588 [inline]
 port_event drivers/usb/core/hub.c:5744 [inline]
 hub_event+0x2efe/0x5730 drivers/usb/core/hub.c:5826
 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292
 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>