INFO: task syz.6.320:6236 blocked for more than 149 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.320       state:D stack:0     pid:6236  tgid:6236  ppid:5620   task_flags:0x400040 flags:0x00800019
Call trace:
 __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:775 (T)
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1370/0x2d80 kernel/sched/core.c:7234
 __schedule_loop kernel/sched/core.c:7311 [inline]
 schedule+0x13c/0x20c kernel/sched/core.c:7326
 request_wait_answer fs/fuse/dev.c:743 [inline]
 __fuse_request_send fs/fuse/dev.c:757 [inline]
 fuse_chan_send+0x824/0xf28 fs/fuse/dev.c:833
 __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:1471
 filp_close+0x28/0x48 fs/open.c:1484
 __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+0x64/0x260 arch/arm64/kernel/entry-common.c:736
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594

Showing all locks held in the system:
1 lock held by khungtaskd/31:
 #0: ffff800088cf7020 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 #0: ffff800088cf7020 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
 #0: ffff800088cf7020 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6775
3 locks held by kworker/u9:0/50:
 #0: ffff0000c39ea940 ((wq_completion)hci1){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #0: ffff0000c39ea940 ((wq_completion)hci1){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405
 #1: ffff800090247c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
 #1: ffff800090247c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405
 #2: ffff000108994ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x178/0x374 net/bluetooth/hci_sync.c:331
2 locks held by getty/4493:
 #0: ffff0000d1cda0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff8000924cb2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x348/0xf78 drivers/tty/n_tty.c:2211
1 lock held by syz.8.646/7636:
7 locks held by syz.7.647/7653:
1 lock held by syz.9.648/7655:
 #0: ffff800088cfc4f8 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x58/0x4ec kernel/rcu/tree.c:3857

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