INFO: task syz.4.29:5024 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.29        state:D stack:0     pid:5024  tgid:5023  ppid:4719   task_flags:0x400140 flags:0x00000011
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
 do_uevent+0x244/0x538 fs/dlm/lockspace.c:206
 new_lockspace fs/dlm/lockspace.c:583 [inline]
 __dlm_new_lockspace+0x1300/0x184c fs/dlm/lockspace.c:638
 dlm_new_user_lockspace+0x78/0xa0 fs/dlm/lockspace.c:671
 device_create_lockspace+0xc4/0x2fc fs/dlm/user.c:414
 device_write+0x674/0xbfc fs/dlm/user.c:606
 vfs_write+0x2a4/0xa0c fs/read_write.c:685
 ksys_write+0x12c/0x228 fs/read_write.c:739
 __do_sys_write fs/read_write.c:750 [inline]
 __se_sys_write fs/read_write.c:747 [inline]
 __arm64_sys_write+0x84/0x98 fs/read_write.c:747
 __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/u8:3/40:
1 lock held by klogd/4331:
2 locks held by getty/4492:
 #0: ffff0000cdbbd0a0 (&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.4.29/5024:
 #0: ffff80008e8b0180 (&ls_lock){+.+.}-{4:4}, at: __dlm_new_lockspace+0xb0/0x184c fs/dlm/lockspace.c:632
1 lock held by dlm_recoverd/5026:
 #0: ffff0000ce684a18 (&ls->ls_in_recovery){+.+.}-{4:4}, at: dlm_recoverd+0xa8/0x1d20 fs/dlm/recoverd.c:400

=============================================