BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 58s!
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 57s!
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=-20 stuck for 56s!
BUG: workqueue lockup - pool cpus=0-1 flags=0x4 nice=0 stuck for 58s!
BUG: workqueue lockup - pool cpus=0-1 node=0 flags=0x4 nice=-20 stuck for 58s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=4 refcnt=5
    in-flight: 3684:request_firmware_work_func
    pending: vmstat_shepherd, psi_avgs_work, kfree_rcu_monitor
  pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=9 refcnt=10
    pending: ovs_dp_masks_rebalance, l2cap_info_timeout, 3*ovs_dp_masks_rebalance, 4*l2cap_info_timeout
workqueue events_long: flags=0x0
  pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=5 refcnt=6
    pending: 5*defense_work_handler
  pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=1 refcnt=2
    pending: defense_work_handler
workqueue events_unbound: flags=0x2
  pwq 8: cpus=0-1 flags=0x4 nice=0 active=1 refcnt=2
    pending: flush_memcg_stats_dwork
  pwq 8: cpus=0-1 flags=0x4 nice=0 active=2 refcnt=3
    pending: toggle_allocation_gate, crng_reseed
workqueue events_power_efficient: flags=0x82
  pwq 8: cpus=0-1 flags=0x4 nice=0 active=5 refcnt=6
    pending: neigh_periodic_work, neigh_managed_work, gc_worker, reg_check_chans_work, neigh_periodic_work
  pwq 8: cpus=0-1 flags=0x4 nice=0 active=2 refcnt=3
    pending: do_cache_clean, neigh_managed_work
workqueue writeback: flags=0x4a
  pwq 8: cpus=0-1 flags=0x4 nice=0 active=1 refcnt=2
    pending: wb_workfn
workqueue kblockd: flags=0x18
  pwq 7: cpus=1 node=0 flags=0x0 nice=-20 active=1 refcnt=2
    pending: blk_mq_timeout_work
workqueue dm_bufio_cache: flags=0x8
  pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2
    pending: work_fn
workqueue krxrpcd: flags=0x2001a
  pwq 9: cpus=0-1 node=0 flags=0x4 nice=-20 active=1 refcnt=7
    pending: rxrpc_peer_keepalive_worker
    inactive: 3*rxrpc_peer_keepalive_worker
workqueue hci0: flags=0x20012
  pwq 9: cpus=0-1 node=0 flags=0x4 nice=-20 active=1 refcnt=4
    pending: hci_cmd_timeout
workqueue hci1: flags=0x20012
  pwq 9: cpus=0-1 node=0 flags=0x4 nice=-20 active=1 refcnt=4
    pending: hci_cmd_timeout
workqueue hci2: flags=0x20012
  pwq 9: cpus=0-1 node=0 flags=0x4 nice=-20 active=1 refcnt=4
    pending: hci_cmd_timeout
workqueue hci3: flags=0x20012
  pwq 9: cpus=0-1 node=0 flags=0x4 nice=-20 active=1 refcnt=4
    pending: hci_cmd_timeout
workqueue hci4: flags=0x20012
  pwq 9: cpus=0-1 node=0 flags=0x4 nice=-20 active=1 refcnt=4
    pending: hci_cmd_timeout
pool 2: cpus=0 node=0 flags=0x0 nice=0 hung=58s workers=4 idle: 6259 8 7
Showing backtraces of running workers in stalled CPU-bound worker pools:
pool 2:
task:kworker/0:2     state:R  running task     stack:0     pid:3684  tgid:3684  ppid:2      flags:0x00000008
Workqueue: events request_firmware_work_func
Call trace:
 __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x14bc/0x24ec kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0xbc/0x238 kernel/sched/core.c:6838
 schedule_timeout+0x1d8/0x348 kernel/time/timer.c:2582
 do_wait_for_common+0x30c/0x468 kernel/sched/completion.c:95
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion_killable_timeout+0x50/0x74 kernel/sched/completion.c:288
 __fw_state_wait_common drivers/base/firmware_loader/firmware.h:104 [inline]
 fw_sysfs_wait_timeout drivers/base/firmware_loader/fallback.c:44 [inline]
 fw_load_sysfs_fallback drivers/base/firmware_loader/fallback.c:110 [inline]
 fw_load_from_user_helper drivers/base/firmware_loader/fallback.c:162 [inline]
 firmware_fallback_sysfs+0x528/0x918 drivers/base/firmware_loader/fallback.c:238
 _request_firmware+0xd1c/0xf7c drivers/base/firmware_loader/main.c:914
 request_firmware_work_func+0xfc/0x214 drivers/base/firmware_loader/main.c:1165
 process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3254
 process_scheduled_works kernel/workqueue.c:3335 [inline]
 worker_thread+0x938/0xef4 kernel/workqueue.c:3416
 kthread+0x288/0x310 kernel/kthread.c:388
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860