INFO: task syz-executor384:3617 blocked for more than 143 seconds.
      Not tainted 6.0.0-rc2-next-20220823-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor384 state:D stack:27632 pid:3617  ppid:3616   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5197 [inline]
 __schedule+0xae5/0x52c0 kernel/sched/core.c:6509
 schedule+0xda/0x1b0 kernel/sched/core.c:6585
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6644
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747
 blkdev_put+0xbc/0x770 block/bdev.c:910
 blkdev_close+0x64/0x80 block/fops.c:499
 __fput+0x27c/0xa90 fs/file_table.c:320
 task_work_run+0xdd/0x1a0 kernel/task_work.c:177
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xc3f/0x2b60 kernel/exit.c:818
 do_group_exit+0xd0/0x2a0 kernel/exit.c:948
 get_signal+0x238c/0x2610 kernel/signal.c:2858
 arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
 exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
 exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe5335136b9
RSP: 002b:00007ffebfc8f668 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 00007fe5335136b9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffebfc8f808 R09: 00007ffebfc8f808
R10: 00007ffebfc8f808 R11: 0000000000000246 R12: 00007fe5334d2740
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
 </TASK>
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc2-next-20220823-syzkaller #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+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:227 [inline]
 watchdog+0xcf7/0xfd0 kernel/hung_task.c:384
 kthread+0x2e4/0x3a0 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: 55 Comm: kworker/u4:4 Not tainted 6.0.0-rc2-next-20220823-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
RIP: 0010:_raw_spin_unlock+0x2b/0x40 kernel/locking/spinlock.c:186
Code: 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 8e 1c d8 f7 48 89 ef e8 76 86 d8 f7 bf 01 00 00 00 e8 3c 50 cb f7 65 8b 05 95 03 7b 76 <85> c0 74 02 5d c3 e8 d4 09 79 f7 5d c3 0f 1f 84 00 00 00 00 00 55
RSP: 0018:ffffc90001567868 EFLAGS: 00000093
RAX: 0000000080000001 RBX: ffff8880b9b39f80 RCX: 0000000000000000
RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffff8880b9b39f80 R08: 0000000000000000 R09: ffff8880b9b39f83
R10: ffffed10173673f0 R11: 0000000000000000 R12: 00000000000f4240
R13: 0000000000000001 R14: ffffed101736740a R15: ffff88813fe23000
FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055850248a600 CR3: 000000000bc8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 newidle_balance+0x47c/0x1190 kernel/sched/fair.c:11324
 pick_next_task_fair+0x96/0x12e0 kernel/sched/fair.c:7651
 __pick_next_task kernel/sched/core.c:5819 [inline]
 pick_next_task kernel/sched/core.c:5894 [inline]
 __schedule+0x426/0x52c0 kernel/sched/core.c:6473
 schedule+0xda/0x1b0 kernel/sched/core.c:6585
 schedule_timeout+0x14a/0x2a0 kernel/time/timer.c:1935
 toggle_allocation_gate mm/kfence/core.c:818 [inline]
 toggle_allocation_gate+0x305/0x390 mm/kfence/core.c:803
 process_one_work+0x991/0x1610 kernel/workqueue.c:2289
 worker_thread+0x665/0x1080 kernel/workqueue.c:2436
 kthread+0x2e4/0x3a0 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.247 msecs