BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 59s! Showing busy workqueues and worker pools: workqueue events: flags=0x100 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=13 refcnt=14 pending: psi_avgs_work, 3*nsim_dev_hwstats_traffic_work, psi_avgs_work, vmstat_shepherd, psi_avgs_work, 4*ovs_dp_masks_rebalance, drm_fb_helper_damage_work, free_obj_work workqueue events_long: flags=0x100 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=4 refcnt=5 pending: 4*defense_work_handler workqueue events_unbound: flags=0x2 pwq 8: cpus=0-1 flags=0x6 nice=0 active=5 refcnt=6 in-flight: 247:cfg80211_wiphy_work for 109s cfg80211_wiphy_work ,40:cfg80211_wiphy_work for 102s cfg80211_wiphy_work ,4888:linkwatch_event for 108s pwq 8: cpus=0-1 flags=0x6 nice=0 active=11 refcnt=12 in-flight: 5105:cfg80211_wiphy_work for 53s cfg80211_wiphy_work ,5102:cfg80211_wiphy_work for 91s cfg80211_wiphy_work ,5104:nsim_dev_trap_report_work for 0s ,5103:nsim_dev_trap_report_work for 0s ,1442:nsim_dev_trap_report_work for 4s ,5106:nsim_dev_trap_report_work for 1s pending: flush_memcg_stats_dwork, nsim_dev_trap_report_work, toggle_allocation_gate workqueue events_power_efficient: flags=0x182 pwq 8: cpus=0-1 flags=0x6 nice=0 active=2 refcnt=3 in-flight: 1382:neigh_periodic_work for 52s ,5101:reg_check_chans_work for 52s pwq 8: cpus=0-1 flags=0x6 nice=0 active=2 refcnt=3 in-flight: 39:gc_worker for 4s pending: fb_flashcursor workqueue mm_percpu_wq: flags=0x108 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: vmstat_update workqueue writeback: flags=0x4a pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2 in-flight: 15:wb_workfn for 67s workqueue mld: flags=0x40108 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=67 in-flight: 10:mld_ifc_work for 59s inactive: 3*mld_ifc_work, mld_dad_work, 11*mld_ifc_work, mld_dad_work, 9*mld_ifc_work, mld_dad_work, 2*mld_ifc_work, mld_dad_work, 2*mld_ifc_work, mld_dad_work, 6*mld_ifc_work, mld_dad_work, 4*mld_ifc_work, mld_dad_work, 11*mld_ifc_work, mld_dad_work, 9*mld_ifc_work workqueue ipv6_addrconf: flags=0x6000a pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=417 MAYDAY in-flight: 2819(RESCUER):addrconf_dad_work for 110s inactive: 411*addrconf_dad_work workqueue bat_events: flags=0x6000a pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=41 MAYDAY in-flight: 2854(RESCUER):batadv_tt_purge for 11s inactive: batadv_tt_purge, 2*batadv_mcast_mla_update, 3*batadv_iv_send_outstanding_bat_ogm_packet, batadv_mcast_mla_update, batadv_purge_orig, 2*batadv_iv_send_outstanding_bat_ogm_packet, 2*batadv_purge_orig, 6*batadv_iv_send_outstanding_bat_ogm_packet, batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_bla_periodic_work, batadv_tt_purge, 2*batadv_mcast_mla_update, 2*batadv_purge_orig, 2*batadv_tt_purge workqueue udp_tunnel_nic: flags=0x20002 pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=6 in-flight: 12:udp_tunnel_nic_device_sync_work for 108s inactive: 2*udp_tunnel_nic_device_sync_work workqueue wg-crypt-wg0: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_encrypt_worker, wg_packet_tx_worker, wg_packet_decrypt_worker workqueue wg-crypt-wg1: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_encrypt_worker, wg_packet_decrypt_worker, wg_packet_tx_worker workqueue wg-crypt-wg2: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_encrypt_worker, wg_packet_tx_worker workqueue wg-crypt-wg0: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_encrypt_worker, wg_packet_tx_worker, wg_packet_decrypt_worker workqueue wg-crypt-wg1: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_encrypt_worker, wg_packet_decrypt_worker, wg_packet_tx_worker workqueue wg-crypt-wg2: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_encrypt_worker, wg_packet_tx_worker workqueue wg-crypt-wg0: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_encrypt_worker, wg_packet_tx_worker, wg_packet_decrypt_worker workqueue wg-crypt-wg1: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_encrypt_worker, wg_packet_tx_worker, wg_packet_decrypt_worker workqueue wg-crypt-wg2: flags=0x128 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_encrypt_worker, wg_packet_tx_worker pool 2: cpus=0 node=0 flags=0x0 nice=0 hung=59s workers=7 idle: 4834 9 4833 1080 5032 5097 pool 8: cpus=0-1 flags=0x6 nice=0 hung=0s workers=15 manager: 5107 Showing backtraces of busy workers in stalled worker pools: pool 2: task:kworker/0:1 state:R running task stack:0 pid:10 tgid:10 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: mld mld_ifc_work Call trace: __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T) context_switch kernel/sched/core.c:5388 [inline] __schedule+0x1bec/0x2dcc kernel/sched/core.c:7189 preempt_schedule_common+0xd4/0x190 kernel/sched/core.c:7370 preempt_schedule+0x60/0x78 kernel/sched/core.c:7394 __local_bh_enable_ip+0x20c/0x35c kernel/softirq.c:457 local_bh_enable include/linux/bottom_half.h:33 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:912 [inline] __dev_queue_xmit+0x11dc/0x2c18 net/core/dev.c:4905 dev_queue_xmit include/linux/netdevice.h:3418 [inline] neigh_connected_output+0x354/0x3e8 net/core/neighbour.c:1648 neigh_output include/net/neighbour.h:560 [inline] ip6_finish_output2+0xce4/0x1a7c net/ipv6/ip6_output.c:136 __ip6_finish_output net/ipv6/ip6_output.c:-1 [inline] ip6_finish_output+0x230/0x618 net/ipv6/ip6_output.c:219 NF_HOOK_COND include/linux/netfilter.h:307 [inline] ip6_output+0x2d0/0x644 net/ipv6/ip6_output.c:246 dst_output include/net/dst.h:470 [inline] NF_HOOK+0x14c/0x45c include/linux/netfilter.h:318 mld_sendpack+0x7fc/0xff0 net/ipv6/mcast.c:1855 mld_send_cr net/ipv6/mcast.c:2154 [inline] mld_ifc_work+0x760/0x9dc net/ipv6/mcast.c:2693 process_one_work kernel/workqueue.c:3314 [inline] process_scheduled_works+0x79c/0x1098 kernel/workqueue.c:3397 worker_thread+0x754/0xba0 kernel/workqueue.c:3478 kthread+0x2f8/0x3c8 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842