INFO: task syz.3.415:5227 blocked for more than 430 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.415       state:D stack:0     pid:5227  tgid:5227  ppid:3813   task_flags:0x400040 flags:0x00000011
Call trace:
 __switch_to+0x5e0/0xb70 arch/arm64/kernel/process.c:775 (T)
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1e0c/0x38cc kernel/sched/core.c:7234
 __schedule_loop kernel/sched/core.c:7311 [inline]
 schedule+0x1b4/0x274 kernel/sched/core.c:7326
 schedule_timeout+0x68/0x1e4 kernel/time/sleep_timeout.c:75
 do_wait_for_common kernel/sched/completion.c:100 [inline]
 __wait_for_common kernel/sched/completion.c:121 [inline]
 wait_for_common kernel/sched/completion.c:132 [inline]
 wait_for_completion+0x1b8/0x414 kernel/sched/completion.c:153
 __synchronize_srcu+0x1c8/0x208 kernel/rcu/srcutree.c:1496
 synchronize_srcu+0x668/0x8dc kernel/rcu/srcutree.c:-1
 mmu_notifier_unregister+0x33c/0x444 mm/mmu_notifier.c:877
 kvm_destroy_vm virt/kvm/kvm_main.c:1276 [inline]
 kvm_put_kvm+0x69c/0xbbc virt/kvm/kvm_main.c:1331
 kvm_vm_release+0x58/0x78 virt/kvm/kvm_main.c:1354
 __fput+0x4ac/0x978 fs/file_table.c:512
 ____fput+0x20/0x30 fs/file_table.c:540
 task_work_run+0x1b8/0x250 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x110/0x188 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 arm64_syscall_exit_to_user_mode arch/arm64/kernel/entry-common.c:88 [inline]
 el0_svc+0x18c/0x240 arch/arm64/kernel/entry-common.c:737
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:755
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594

Showing all locks held in the system:
1 lock held by khungtaskd/26:
 #0: ffff800087e43318 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 #0: ffff800087e43318 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
 #0: ffff800087e43318 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6775
1 lock held by syslogd/3169:
2 locks held by getty/3239:
 #0: f7f00000126d60a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: a7ff80008cb8b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x314/0x11f8 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/3369:
3 locks held by kworker/u4:0/3378:
2 locks held by kworker/u4:6/3426:
 #0: 9cf000000d036140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #0: 9cf000000d036140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x958/0x154c kernel/workqueue.c:3405
 #1: ffff8000a3927ce8 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3298 [inline]
 #1: ffff8000a3927ce8 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x978/0x154c kernel/workqueue.c:3405
3 locks held by kworker/u4:10/3989:
2 locks held by kworker/u4:5/4769:
3 locks held by kworker/u4:1/5081:
2 locks held by syz.2.414/5225:
3 locks held by kworker/u4:11/5319:
2 locks held by syz-executor/5411:
1 lock held by modprobe/5430:

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