INFO: task syz.6.623:6253 blocked for more than 430 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.623       state:D stack:0     pid:6253  tgid:6253  ppid:6044   task_flags:0x400040 flags:0x00000011
Call trace:
 __switch_to+0x584/0xb00 arch/arm64/kernel/process.c:742 (T)
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x200c/0x3428 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0xac/0x27c kernel/sched/core.c:6960
 schedule_timeout+0x68/0x1ec kernel/time/sleep_timeout.c:75
 do_wait_for_common+0x28c/0x440 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:1518
 synchronize_srcu+0x3d0/0x4f8 kernel/rcu/srcutree.c:-1
 mmu_notifier_unregister+0x320/0x428 mm/mmu_notifier.c:831
 kvm_destroy_vm virt/kvm/kvm_main.c:1296 [inline]
 kvm_put_kvm+0x698/0xbe0 virt/kvm/kvm_main.c:1354
 kvm_vm_release+0x58/0x78 virt/kvm/kvm_main.c:1377
 __fput+0x4ac/0x978 fs/file_table.c:468
 ____fput+0x20/0x58 fs/file_table.c:496
 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:44 [inline]
 exit_to_user_mode_loop+0x110/0x188 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline]
 arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline]
 el0_svc+0x17c/0x238 arch/arm64/kernel/entry-common.c:725
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 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: ffff800087a86d08 (rcu_read_lock){....}-{1:3}, at: __ll_sc_atomic64_fetch_or arch/arm64/include/asm/atomic_ll_sc.h:-1 [inline]
 #0: ffff800087a86d08 (rcu_read_lock){....}-{1:3}, at: arch_atomic64_fetch_or arch/arm64/include/asm/atomic.h:86 [inline]
 #0: ffff800087a86d08 (rcu_read_lock){....}-{1:3}, at: raw_atomic64_fetch_or include/linux/atomic/atomic-arch-fallback.h:3816 [inline]
 #0: ffff800087a86d08 (rcu_read_lock){....}-{1:3}, at: raw_atomic_long_fetch_or include/linux/atomic/atomic-long.h:1090 [inline]
 #0: ffff800087a86d08 (rcu_read_lock){....}-{1:3}, at: arch_test_and_set_bit include/asm-generic/bitops/atomic.h:42 [inline]
 #0: ffff800087a86d08 (rcu_read_lock){....}-{1:3}, at: test_and_set_bit include/asm-generic/bitops/instrumented-atomic.h:72 [inline]
 #0: ffff800087a86d08 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x0/0x44 kernel/sched/sched.h:3748
1 lock held by syslogd/3128:
1 lock held by dhcpcd/3168:
2 locks held by getty/3198:
 #0: dcf000001231a8a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: 6aff80008c80b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x308/0x1234 drivers/tty/n_tty.c:2211
1 lock held by sshd-session/3330:
2 locks held by syz-executor/3331:
3 locks held by kworker/u4:10/3491:
3 locks held by kworker/u4:11/5420:
3 locks held by kworker/u4:2/5570:
3 locks held by kworker/u4:3/5576:
3 locks held by kworker/u4:4/5769:
3 locks held by kworker/u4:8/6063:
3 locks held by kworker/u4:12/6110:
2 locks held by kworker/u4:15/6156:
2 locks held by syz.5.621/6247:
3 locks held by kworker/u4:0/6340:
3 locks held by kworker/u4:1/6362:

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