INFO: task syz.4.78:4368 blocked for more than 430 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.78        state:D stack:0     pid:4368  tgid:4367  ppid:3895   task_flags:0x400040 flags:0x00000019
Call trace:
 __switch_to+0x584/0xb20 arch/arm64/kernel/process.c:741 (T)
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1eec/0x33a4 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0xac/0x27c kernel/sched/core.c:7058
 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:1444
 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+0x6a0/0xfa8 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_close_sync+0xcc/0x1e8 fs/file_table.c:573
 __do_sys_close fs/open.c:1587 [inline]
 __se_sys_close fs/open.c:1572 [inline]
 __arm64_sys_close+0x8c/0x13c fs/open.c:1572
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x90/0x2b4 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x180/0x2f4 arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x58/0x74 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x164 arch/arm64/kernel/entry-common.c:879
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

Showing all locks held in the system:
3 locks held by kworker/u4:0/12:
1 lock held by khungtaskd/27:
 #0: ffff800087876d18 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330
3 locks held by kworker/u4:2/35:
2 locks held by getty/3184:
 #0: 7cf0000011d0a8a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: e7ff80008c5cb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x310/0x12b8 drivers/tty/n_tty.c:2222
2 locks held by syz-executor/3318:
3 locks held by kworker/u4:5/3366:
2 locks held by kworker/u4:7/3415:
 #0: 40f000000cc20948 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7c8/0x1a18 kernel/workqueue.c:3210
 #1: ffff80008fee7c78 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x854/0x1a18 kernel/workqueue.c:3210
2 locks held by kworker/u4:10/3721:
 #0: 40f000000cc20948 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7c8/0x1a18 kernel/workqueue.c:3210
 #1: ffff80008e5d7c78 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x854/0x1a18 kernel/workqueue.c:3210
2 locks held by kworker/u4:8/3920:
3 locks held by kworker/u4:11/4050:
2 locks held by syz.5.77/4364:
3 locks held by kworker/u4:1/4380:
2 locks held by kworker/u4:13/4501:
3 locks held by kworker/u4:14/4511:
2 locks held by modprobe/4535:
1 lock held by modprobe/4536:

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