INFO: task syz.7.12798:29257 blocked for more than 148 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.12798     state:D stack:28424 pid:29257 tgid:29254 ppid:25922  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 cgroup_lock_and_drain_offline+0x51a/0x650
 cgroup1_get_tree+0x9d/0x890
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x319/0xdc0
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd6b699e159
RSP: 002b:00007fd6b7826028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fd6b6c26180 RCX: 00007fd6b699e159
RDX: 0000200000000240 RSI: 0000200000000000 RDI: 0000000000000000
RBP: 00007fd6b6a3506b R08: 0000200000000440 R09: 0000000000000000
R10: 0000000000010012 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd6b6c26218 R14: 00007fd6b6c26180 R15: 00007ffde112fa98
 </TASK>

Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
 #0: ffffffff8eb5ff68 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770
1 lock held by khungtaskd/34:
 #0: 
ffffffff8eb59c60
 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5423:
 #0: 
ffff888168dff0a0
 (
&tty->ldisc_sem
){++++}-{0:0}
, at: tty_ldisc_ref_wait+0x25/0x70
 #1: 
ffffc900034732e8
 (
&ldata->atomic_read_lock
){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360
7 locks held by kworker/0:8/13623:
 #0: 
ffff8881688a6d40
 (
(wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #1: ffffc9000468fc40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #2: 
ffff8881077071d8
 (
&dev->mutex
){....}-{4:4}
, at: hub_event+0x184/0x4d30
 #3: ffff88811af001d8 (&dev->mutex){....}-{4:4}, at: usb_disconnect+0xfc/0x9a0
 #4: ffff888112f2b1a0 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb9/0x880
 #5: ffffffff8fa9e4e0 (input_mutex){+.+.}-{4:4}, at: __input_unregister_device+0x2d8/0x650
 #6: ffffffff8eb5ff68
 (
rcu_state.exp_mutex
){+.+.}-{4:4}
, at: synchronize_rcu_expedited+0x38d/0x770
6 locks held by kworker/0:0/21679:
 #0: 
ffff8881688a6d40 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #1: ffffc90009ca7c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #2: 
ffff8881088081d8
 (
&dev->mutex){....}-{4:4}, at: hub_event+0x184/0x4d30
 #3: 
ffff88812103b160
 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2d/0x160
 #4: ffff888121024440 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x57/0x7d0
 #5: 
ffff88812103b160
 (&rq->__lock){-.-.}-{2:2}, at: try_to_wake_up+0x67/0x14d0
4 locks held by kworker/1:2/25346:
1 lock held by dhcpcd/29944:
 #0: ffff88818c979a40 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: sock_close+0x82/0x220
1 lock held by dhcpcd/30113:
 #0: 
ffff888107a2dc40
 (
&sb->s_type->i_mutex_key
#13
){+.+.}-{4:4}
, at: sock_close+0x82/0x220
2 locks held by kworker/1:5/30755:
2 locks held by syz.2.13200/30877:
4 locks held by udevd/30967:
 #0: 
ffff8881be2fc3f8 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xa4/0xca0
 #1: ffff88811b323880 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x5d/0x420
 #2: 
ffff88810ed8a2d8 (
kn->active#31){++++}-{0:0}, at: kernfs_seq_start+0xb2/0x420
 #3: 
ffff88811af001d8
 (
&dev->mutex
){....}-{4:4}, at: manufacturer_show+0x26/0xa0
2 locks held by rm/31353:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(lazy) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x380
 sys_info+0x135/0x170
 watchdog+0xfd7/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
yealink 3-1:36.0: urb_ctl_callback - urb status -32
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30877 Comm: syz.2.13200 Tainted: G             L      syzkaller #0 PREEMPT(lazy) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:io_serial_out+0x7c/0xc0
Code: f3 60 fc 44 89 f9 d3 e5 49 83 c6 40 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 dc 84 ce fc 41 03 2e 89 d8 89 ea ee <5b> 41 5c 41 5e 41 5f 5d c3 cc cc cc cc cc 44 89 f9 80 e1 07 38 c1
RSP: 0018:ffffc90000a08330 EFLAGS: 00000006
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 00000000000003f9 RSI: 0000000000000000 RDI: 0000000000000020
RBP: 00000000000003f9 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: ffffffff8565fde0 R12: dffffc0000000000
R13: ffffffff9aad2080 R14: ffffffff9aad20c0 R15: 0000000000000000
FS:  00007fdd742e96c0(0000) GS:ffff8882a8f59000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e69cb16680 CR3: 000000000e946000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 serial8250_console_write+0x571/0x1ba0
 console_flush_all+0x6ea/0xaf0
 console_unlock+0xd1/0x1c0
 vprintk_emit+0x485/0x560
 dev_vprintk_emit+0x338/0x400
 dev_printk_emit+0xee/0x140
 _dev_err+0x11e/0x180
 urb_ctl_callback+0x1d1/0x290
 __usb_hcd_giveback_urb+0x374/0x530
 dummy_timer+0xac3/0x4b40
 __hrtimer_run_queues+0x3bc/0xa10
 hrtimer_run_softirq+0x17a/0x240
 handle_softirqs+0x225/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_acquire+0x221/0x350
Code: ff ff ff e8 61 df 2c 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 4b ca c9 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d 38 3e b8
RSP: 0018:ffffc90007f46f60 EFLAGS: 00000286
RAX: 4558f5b1e8e18b00 RBX: 0000000000000000 RCX: 0000000000000046
RDX: 0000000064d4b79b RSI: ffffffff8e4ac5d0 RDI: ffffffff8c4bb580
RBP: ffffffff8177727f R08: ffffffff8177727f R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb59c60 R12: 0000000000000002
R13: ffffffff8eb59c60 R14: 0000000000000000 R15: 0000000000000246
 unwind_next_frame+0xac/0x2550
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 call_rcu+0xee/0x8b0
 __destroy_inode+0x2a1/0x630
 evict+0x8d4/0xb50
 dentry_kill+0x1b9/0x880
 shrink_dentry_list+0x209/0x310
 shrink_dcache_tree+0xe7/0x410
 do_one_tree+0x18/0xa0
 shrink_dcache_for_umount+0x111/0x500
 generic_shutdown_super+0x6f/0x2d0
 kill_anon_super+0x3b/0x70
 binderfs_kill_super+0x44/0x90
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x3d3/0x460
 task_work_run+0x1d9/0x270
 do_exit+0x73a/0x2360
 do_group_exit+0x22d/0x2f0
 get_signal+0x121b/0x12c0
 arch_do_signal_or_restart+0xbb/0x860
 exit_to_user_mode_loop+0x104/0x730
 do_syscall_64+0x353/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdd7339e159
Code: Unable to access opcode bytes at 0x7fdd7339e12f.
RSP: 002b:00007fdd742e9028 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: 0000000000018ff8 RBX: 00007fdd73626090 RCX: 00007fdd7339e159
RDX: 0000000000018ff8 RSI: 0000200000019680 RDI: 000000000000000b
RBP: 00007fdd7343506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdd73626128 R14: 00007fdd73626090 R15: 00007ffe48f3a6d8
 </TASK>
yealink 3-1:36.0: urb_irq_callback - urb status -71
yealink 3-1:36.0: unexpected response 0
yealink 3-1:36.0: urb_ctl_callback - urb status -32
yealink 3-1:36.0: urb_irq_callback - urb status -71
yealink 3-1:36.0: unexpected response 0
