INFO: task kworker/0:1H:149 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1H    state:D stack:    0 pid:  149 ppid:     2 flags:0x00000008
Workqueue: glock_workqueue glock_work_func
Call trace:
 __switch_to+0x2f4/0x540 arch/arm64/kernel/process.c:521
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0xe20/0x1c6c kernel/sched/core.c:6395
 schedule+0x11c/0x1c8 kernel/sched/core.c:6478
 rwsem_down_write_slowpath+0xc90/0x1490 kernel/locking/rwsem.c:1165
 __down_write_common kernel/locking/rwsem.c:1292 [inline]
 __down_write kernel/locking/rwsem.c:1301 [inline]
 down_write+0xe8/0x12c kernel/locking/rwsem.c:1552
 freeze_super+0x54/0x36c fs/super.c:1696
 freeze_go_sync+0x12c/0x320 fs/gfs2/glops.c:599
 do_xmote+0x2f0/0xf64 fs/gfs2/glock.c:742
 run_queue+0x400/0x694 fs/gfs2/glock.c:872
 glock_work_func+0x20c/0x444 fs/gfs2/glock.c:1039
 process_one_work+0x7a4/0x1178 kernel/workqueue.c:2310
 worker_thread+0x8fc/0x103c kernel/workqueue.c:2457
 kthread+0x37c/0x460 kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:856
INFO: task syz.0.15:4702 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.15        state:D stack:    0 pid: 4702 ppid:  4610 flags:0x00000009
Call trace:
 __switch_to+0x2f4/0x540 arch/arm64/kernel/process.c:521
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0xe20/0x1c6c kernel/sched/core.c:6395
 schedule+0x11c/0x1c8 kernel/sched/core.c:6478
 schedule_timeout+0xc8/0x2f4 kernel/time/timer.c:2093
 do_wait_for_common+0x1fc/0x368 kernel/sched/completion.c:85
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x48/0x60 kernel/sched/completion.c:138
 flush_workqueue+0x4cc/0x1060 kernel/workqueue.c:2882
 gfs2_gl_hash_clear+0xcc/0x2d4 fs/gfs2/glock.c:2182
 gfs2_fill_super+0x11ac/0x1a9c fs/gfs2/ops_fstype.c:1309
 get_tree_bdev+0x35c/0x54c fs/super.c:1325
 gfs2_get_tree+0x58/0x1b8 fs/gfs2/ops_fstype.c:1332
 vfs_get_tree+0x90/0x278 fs/super.c:1530
 do_new_mount+0x228/0x804 fs/namespace.c:3034
 path_mount+0x57c/0xfe8 fs/namespace.c:3364
 do_mount fs/namespace.c:3377 [inline]
 __do_sys_mount fs/namespace.c:3585 [inline]
 __se_sys_mount fs/namespace.c:3562 [inline]
 __arm64_sys_mount+0x488/0x5f8 fs/namespace.c:3562
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x28c arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x5c/0x140 arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1d0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Showing all locks held in the system:
2 locks held by kworker/u4:0/9:
 #0: ffff0000c0029138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x67c/0x1178 kernel/workqueue.c:-1
 #1: ffff80001b507c40 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x6c0/0x1178 kernel/workqueue.c:2285
1 lock held by khungtaskd/27:
 #0: ffff800014571460 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:312
3 locks held by kworker/0:1H/149:
 #0: ffff0000c7219138 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: process_one_work+0x67c/0x1178 kernel/workqueue.c:-1
 #1: ffff80001cfd7c40 ((work_completion)(&(&gl->gl_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6c0/0x1178 kernel/workqueue.c:2285
 #2: ffff0000ea12a0e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: freeze_super+0x54/0x36c fs/super.c:1696
2 locks held by getty/3803:
 #0: ffff0000d3c5f098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340
 #1: ffff80001bd6e2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xf90 drivers/tty/n_tty.c:2158
1 lock held by syz.0.15/4702:
 #0: ffff0000ea12a0e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x1a4/0x860 fs/super.c:229

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