INFO: task syz.4.514:7412 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.514       state:D stack:0     pid:7412  ppid:6317   flags:0x00000809
Call trace:
 __switch_to+0x2f4/0x550 arch/arm64/kernel/process.c:555
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0xdd0/0x1b0c kernel/sched/core.c:6562
 schedule+0xc4/0x170 kernel/sched/core.c:6638
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6697
 rwsem_down_read_slowpath+0x4b8/0x79c kernel/locking/rwsem.c:1094
 __down_read_common kernel/locking/rwsem.c:1261 [inline]
 __down_read kernel/locking/rwsem.c:1274 [inline]
 down_read+0xa8/0x300 kernel/locking/rwsem.c:1522
 iterate_supers+0xa8/0x1d0 fs/super.c:755
 ksys_sync+0x9c/0x17c fs/sync.c:102
 __arm64_sys_sync+0x14/0x24 fs/sync.c:113
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x1fc/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffff8000153d7c30 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
 #0: ffff8000153d8450 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x40/0xbb4 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
 #0: ffff8000153d72c0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:349
2 locks held by getty/4079:
 #0: ffff0000d6cf5098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff8000207bb2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xfa0 drivers/tty/n_tty.c:2198
2 locks held by syz-executor/5487:
4 locks held by syz-executor/6143:
1 lock held by syz.4.514/7412:
 #0: ffff0001027ce0e0 (&type->s_umount_key#54){++++}-{3:3}, at: iterate_supers+0xa8/0x1d0 fs/super.c:755
1 lock held by syz.5.1532/12450:
 #0: ffff0000df433148 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline]
 #0: ffff0000df433148 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x144/0x294 mm/util.c:518
1 lock held by syz.5.1532/12451:
2 locks held by dhcpcd-run-hook/12455:
 #0: ffff00019f569198 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:538 [inline]
 #0: ffff00019f569198 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1362 [inline]
 #0: ffff00019f569198 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1652 [inline]
 #0: ffff00019f569198 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x2b8/0x1b0c kernel/sched/core.c:6478
 #1: ffff800015246a98 (cpu_asid_lock){....}-{2:2}, at: check_and_switch_context+0x13c/0x6c8 arch/arm64/mm/context.c:246
4 locks held by dhcpcd-run-hook/12456:

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