INFO: task syz-executor:4565 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:    0 pid: 4565 ppid:     1 flags:0x00000001
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
 bit_wait+0x1c/0xac kernel/sched/wait_bit.c:199
 __wait_on_bit kernel/sched/wait_bit.c:49 [inline]
 out_of_line_wait_on_bit+0x16c/0x218 kernel/sched/wait_bit.c:64
 wait_on_bit include/linux/wait_bit.h:76 [inline]
 gfs2_glock_wait fs/gfs2/glock.c:1282 [inline]
 gfs2_glock_nq+0x8dc/0x13d0 fs/gfs2/glock.c:1538
 gfs2_glock_nq_init fs/gfs2/glock.h:246 [inline]
 __gfs2_lookup+0x120/0x28c fs/gfs2/inode.c:883
 gfs2_lookup+0x2c/0x3c fs/gfs2/inode.c:908
 __lookup_slow+0x25c/0x39c fs/namei.c:1671
 lookup_slow+0x60/0x84 fs/namei.c:1688
 walk_component+0x2b8/0x3b8 fs/namei.c:1984
 lookup_last fs/namei.c:2439 [inline]
 path_lookupat+0x168/0x3f0 fs/namei.c:2463
 filename_lookup+0x1c8/0x478 fs/namei.c:2492
 user_path_at_empty+0x5c/0x1a0 fs/namei.c:2891
 user_path_at include/linux/namei.h:57 [inline]
 ksys_umount fs/namespace.c:1786 [inline]
 __do_sys_umount fs/namespace.c:1794 [inline]
 __se_sys_umount fs/namespace.c:1792 [inline]
 __arm64_sys_umount+0xf8/0x184 fs/namespace.c:1792
 __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: ffff80001b4f7c40 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x6c0/0x1178 kernel/workqueue.c:2285
1 lock held by khungtaskd/27:
 #0: ffff800014561460 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:312
2 locks held by kworker/u4:4/450:
 #0: ffff0000c0029138
 ((wq_completion)events_unbound
){+.+.}-{0:0}
, at: process_one_work+0x67c/0x1178 kernel/workqueue.c:-1
 #1: 
ffff80001fcf7c40
 (
(reaper_work).work
){+.+.}-{0:0}, at: process_one_work+0x6c0/0x1178 kernel/workqueue.c:2285
2 locks held by getty/3803:
 #0: ffff0000d4cfa098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340
 #1: ffff80001bf7e2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x2ec/0xf90 drivers/tty/n_tty.c:2158
3 locks held by kworker/0:11/4499:
 #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x67c/0x1178 kernel/workqueue.c:-1
 #1: ffff80001fac7c40 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6c0/0x1178 kernel/workqueue.c:2285
 #2: ffff0000d5446240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1d8/0x27c4 drivers/net/netdevsim/fib.c:1480
1 lock held by syz-executor/4565:
 #0: ffff0000ee83b0c8 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:797 [inline]
 #0: ffff0000ee83b0c8 (&type->i_mutex_dir_key#8){.+.+}-{3:3}, at: lookup_slow+0x50/0x84 fs/namei.c:1687
2 locks held by udevd/4699:
 #0: ffff0000cbb3c118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xdc/0x6c4 block/bdev.c:915
 #1: ffff0000cbc7a468 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0xa0/0x988 drivers/block/loop.c:1366
1 lock held by syz.1.640/6605:

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