BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 191s!
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 191s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=5/256 refcnt=6
    pending: ovs_dp_masks_rebalance, kfree_rcu_monitor, 3*l2cap_info_timeout
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=8/256 refcnt=9
    pending: vmstat_shepherd, psi_avgs_work, kfree_rcu_monitor, l2cap_info_timeout, 4*ovs_dp_masks_rebalance
workqueue events_long: flags=0x0
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256 refcnt=3
    pending: 2*defense_work_handler
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=3/256 refcnt=4
    pending: 3*defense_work_handler
workqueue events_unbound: flags=0x2
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=2/512 refcnt=3
    pending: toggle_allocation_gate, crng_reseed
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/512 refcnt=2
    pending: flush_memcg_stats_dwork
workqueue events_freezable: flags=0x4
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: update_balloon_stats_func
workqueue events_power_efficient: flags=0x80
  pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=2/256 refcnt=3
    pending: neigh_managed_work, neigh_periodic_work
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=7/256 refcnt=8
    pending: crda_timeout_work, do_cache_clean, neigh_managed_work, neigh_periodic_work, gc_worker, reg_check_chans_work, check_lifetime
workqueue writeback: flags=0x4a
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/256 refcnt=2
    pending: wb_workfn
workqueue dm_bufio_cache: flags=0x8
  pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
    pending: work_fn
workqueue ipv6_addrconf: flags=0xe000a
  pwq 4: cpus=0-1 flags=0x4 nice=0 active=1/1 refcnt=4
    pending: addrconf_verify_work
workqueue krxrpcd: flags=0xa001a
  pwq 5: cpus=0-1 node=0 flags=0x4 nice=-20 active=1/1 refcnt=8
    pending: rxrpc_peer_keepalive_worker
    inactive: 4*rxrpc_peer_keepalive_worker
workqueue hci0: flags=0xa0012
  pwq 5: cpus=0-1 node=0 flags=0x4 nice=-20 active=1/1 refcnt=5
    pending: hci_cmd_timeout
    inactive: hci_conn_timeout
workqueue hci1: flags=0xa0012
  pwq 5: cpus=0-1 node=0 flags=0x4 nice=-20 active=1/1 refcnt=5
    pending: hci_cmd_timeout
    inactive: hci_conn_timeout
workqueue hci2: flags=0xa0012
  pwq 5: cpus=0-1 node=0 flags=0x4 nice=-20 active=1/1 refcnt=5
    pending: hci_cmd_timeout
    inactive: hci_conn_timeout
workqueue hci3: flags=0xa0012
  pwq 5: cpus=0-1 node=0 flags=0x4 nice=-20 active=1/1 refcnt=5
    pending: hci_cmd_timeout
    inactive: hci_conn_timeout
Showing backtraces of running workers in stalled CPU-bound worker pools: