INFO: task syz.4.571:9422 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.571       state:D stack:0     pid:9422  tgid:9422  ppid:8767   task_flags:0x400040 flags:0x00800019
Call trace:
 __switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:775 (T)
 context_switch kernel/sched/core.c:5533 [inline]
 __schedule+0x135c/0x2b00 kernel/sched/core.c:7284
 __schedule_loop kernel/sched/core.c:7361 [inline]
 schedule+0x13c/0x20c kernel/sched/core.c:7376
 request_wait_answer fs/fuse/dev.c:749 [inline]
 __fuse_request_send fs/fuse/dev.c:768 [inline]
 fuse_chan_send+0x840/0xf60 fs/fuse/dev.c:844
 __fuse_simple_request+0xa0/0xb8 fs/fuse/req.c:69
 fuse_simple_request fs/fuse/fuse_i.h:1012 [inline]
 fuse_flush+0x3fc/0x5e4 fs/fuse/file.c:504
 filp_flush+0xb4/0x184 fs/open.c:1520
 filp_close+0x28/0x48 fs/open.c:1533
 __range_close fs/file.c:793 [inline]
 __do_sys_close_range fs/file.c:854 [inline]
 __se_sys_close_range fs/file.c:818 [inline]
 __arm64_sys_close_range+0x30c/0x808 fs/file.c:818
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796
 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606

Showing all locks held in the system:
locks held by khungtaskd/31: 1, last CPU#0:
 #0: ffff800088c618e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffff800088c618e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffff800088c618e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6871
locks held by getty/4490: 2, on CPU#1:
 #0: ffff0000ca1a40a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80009246e2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x348/0xf78 drivers/tty/n_tty.c:2211

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