INFO: task syz.8.165:5213 blocked for more than 430 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.165       state:D stack:0     pid:5213  tgid:5208  ppid:4906   task_flags:0x40044c flags:0x00000018
Call trace:
 __switch_to+0x584/0xb20 arch/arm64/kernel/process.c:741 (T)
 context_switch kernel/sched/core.c:5325 [inline]
 __schedule+0x1eec/0x33a4 kernel/sched/core.c:6929
 __schedule_loop kernel/sched/core.c:7011 [inline]
 schedule+0xac/0x27c kernel/sched/core.c:7026
 schedule_timeout+0x5c/0x1e4 kernel/time/sleep_timeout.c:75
 do_wait_for_common+0x28c/0x444 kernel/sched/completion.c:100
 __wait_for_common kernel/sched/completion.c:121 [inline]
 wait_for_common kernel/sched/completion.c:132 [inline]
 wait_for_completion+0x44/0x5c kernel/sched/completion.c:153
 __synchronize_srcu+0x2a4/0x320 kernel/rcu/srcutree.c:1454
 synchronize_srcu+0x3cc/0x4f0 kernel/rcu/srcutree.c:-1
 mmu_notifier_unregister+0x320/0x42c mm/mmu_notifier.c:831
 kvm_destroy_vm virt/kvm/kvm_main.c:1295 [inline]
 kvm_put_kvm+0x698/0xbe8 virt/kvm/kvm_main.c:1353
 kvm_vm_release+0x58/0x78 virt/kvm/kvm_main.c:1376
 __fput+0x4ac/0x980 fs/file_table.c:468
 ____fput+0x20/0x58 fs/file_table.c:496
 task_work_run+0x1bc/0x254 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x7f0/0x2378 kernel/exit.c:966
 do_group_exit+0x1d4/0x2ac kernel/exit.c:1107
 get_signal+0x1440/0x1554 kernel/signal.c:3034
 arch_do_signal_or_restart+0x23c/0x4d98 arch/arm64/kernel/signal.c:1619
 exit_to_user_mode_loop+0x7c/0x178 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:103 [inline]
 el0_svc+0x170/0x234 arch/arm64/kernel/entry-common.c:747
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffff800087957208 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330
3 locks held by kworker/u4:3/43:
2 locks held by kworker/u4:5/52:
 #0: 50f000000cc26948 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7c8/0x1a18 kernel/workqueue.c:3237
 #1: ffff80008cc47c88 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x854/0x1a18 kernel/workqueue.c:3237
1 lock held by syslogd/3124:
2 locks held by getty/3194:
 #0: 2ff00000120328a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: 3cff80008c6db2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x310/0x12b8 drivers/tty/n_tty.c:2222
2 locks held by syz-executor/3320:
3 locks held by kworker/u4:0/3352:
3 locks held by kworker/u4:8/3614:
3 locks held by kworker/u4:11/4283:
2 locks held by kworker/u4:7/4634:
3 locks held by kworker/u4:6/4922:
3 locks held by kworker/u4:15/5070:
2 locks held by syz.9.164/5203:
1 lock held by syz-executor/5228:
3 locks held by kworker/u4:10/5231:
1 lock held by modprobe/5367:

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