BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 36s! BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=-20 stuck for 36s! Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=11 refcnt=12 in-flight: 9:reg_todo pending: 4*ovs_dp_masks_rebalance, 4*nsim_dev_hwstats_traffic_work, 2*psi_avgs_work pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=11 refcnt=12 in-flight: 24:nsim_fib_event_work pending: 2*ovs_dp_masks_rebalance, 2*nsim_dev_hwstats_traffic_work, 3*psi_avgs_work, delayed_vfree_work, drm_fb_helper_damage_work, free_obj_work workqueue events_highpri: flags=0x10 pwq 7: cpus=1 node=0 flags=0x0 nice=-20 active=1 refcnt=2 pending: fill_page_cache_func workqueue events_long: flags=0x0 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=2 refcnt=3 in-flight: 6644:defense_work_handler pending: defense_work_handler pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=2 refcnt=3 in-flight: 6593:defense_work_handler pending: defense_work_handler workqueue events_unbound: flags=0x2 pwq 8: cpus=0-1 flags=0x6 nice=0 active=12 refcnt=13 in-flight: 6711:cfg80211_wiphy_work cfg80211_wiphy_work ,41:cfg80211_wiphy_work cfg80211_wiphy_work pending: 5*nsim_dev_trap_report_work, toggle_allocation_gate, nsim_dev_trap_report_work, flush_memcg_stats_dwork pwq 8: cpus=0-1 flags=0x6 nice=0 active=16 refcnt=17 in-flight: 1823:cfg80211_wiphy_work cfg80211_wiphy_work ,15:cfg80211_wiphy_work cfg80211_wiphy_work ,42:cfg80211_wiphy_work cfg80211_wiphy_work ,2090:cfg80211_wiphy_work cfg80211_wiphy_work ,1930:cfg80211_wiphy_work cfg80211_wiphy_work ,12:cfg80211_wiphy_work cfg80211_wiphy_work ,4817:cfg80211_wiphy_work cfg80211_wiphy_work ,4171:cfg80211_wiphy_work cfg80211_wiphy_work workqueue events_power_efficient: flags=0x82 pwq 8: cpus=0-1 flags=0x6 nice=0 active=6 refcnt=7 in-flight: 7961:gc_worker ,7959:reg_check_chans_work ,6689:crda_timeout_work pending: do_cache_clean, fb_flashcursor, wg_ratelimiter_gc_entries pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2 in-flight: 6722:neigh_periodic_work workqueue mm_percpu_wq: flags=0x8 pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: vmstat_update workqueue kblockd: flags=0x18 pwq 7: cpus=1 node=0 flags=0x0 nice=-20 active=3 refcnt=4 in-flight: 56:blk_mq_timeout_work pending: 2*blk_mq_timeout_work workqueue ipv6_addrconf: flags=0x6000a pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=35 in-flight: 4200(RESCUER):addrconf_dad_work inactive: 2*addrconf_dad_work, addrconf_verify_work, 25*addrconf_dad_work, 2*addrconf_verify_work workqueue bat_events: flags=0x6000a pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=49 in-flight: 4275(RESCUER):batadv_tt_purge inactive: 3*batadv_tt_purge, 2*batadv_purge_orig, 7*batadv_iv_send_outstanding_bat_ogm_packet, 3*batadv_purge_orig, 5*batadv_iv_send_outstanding_bat_ogm_packet, batadv_dat_purge, batadv_bla_periodic_work, batadv_tt_purge, 5*batadv_nc_worker, 4*batadv_mcast_mla_update, 2*batadv_bla_periodic_work, 2*batadv_dat_purge, 2*batadv_bla_periodic_work, batadv_dat_purge, batadv_mcast_mla_update, 3*batadv_iv_send_outstanding_bat_ogm_packet, batadv_dat_purge workqueue hci2: flags=0x20012 pwq 9: cpus=0-1 node=0 flags=0x4 nice=-20 active=1 refcnt=4 in-flight: 6122:hci_cmd_sync_work workqueue hci3: flags=0x20012 pwq 9: cpus=0-1 node=0 flags=0x4 nice=-20 active=1 refcnt=4 in-flight: 6534:hci_cmd_sync_work workqueue wg-crypt-wg0: flags=0x28 pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_tx_worker, wg_packet_encrypt_worker workqueue wg-crypt-wg1: flags=0x28 pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_tx_worker, wg_packet_encrypt_worker workqueue wg-crypt-wg0: flags=0x28 pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_tx_worker, wg_packet_encrypt_worker workqueue wg-crypt-wg1: flags=0x28 pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_tx_worker, wg_packet_decrypt_worker, wg_packet_encrypt_worker workqueue wg-crypt-wg2: flags=0x28 pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_decrypt_worker, wg_packet_encrypt_worker, wg_packet_tx_worker workqueue wg-crypt-wg2: flags=0x28 pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_tx_worker, wg_packet_encrypt_worker workqueue wg-crypt-wg0: flags=0x28 pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_tx_worker, wg_packet_encrypt_worker workqueue wg-crypt-wg1: flags=0x28 pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_tx_worker, wg_packet_encrypt_worker workqueue wg-crypt-wg2: flags=0x28 pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_tx_worker, wg_packet_encrypt_worker workqueue wg-crypt-wg0: flags=0x28 pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_tx_worker, wg_packet_encrypt_worker workqueue wg-crypt-wg1: flags=0x28 pwq 6: cpus=1 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=0x28 pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_decrypt_worker, wg_packet_encrypt_worker, wg_packet_tx_worker workqueue loop0: flags=0x6 pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2 pending: loop_rootcg_workfn workqueue wg-kex-wg0: flags=0x24 pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-kex-wg0: flags=0x6 pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_send_worker workqueue wg-crypt-wg0: flags=0x28 pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_encrypt_worker, wg_packet_tx_worker workqueue wg-crypt-wg1: flags=0x28 pwq 6: cpus=1 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-kex-wg2: flags=0x24 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 in-flight: 6600:wg_packet_handshake_receive_worker pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=1 refcnt=2 in-flight: 6649:wg_packet_handshake_receive_worker workqueue wg-kex-wg2: flags=0x6 pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_send_worker workqueue wg-crypt-wg2: flags=0x28 pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=3 refcnt=4 pending: wg_packet_decrypt_worker, wg_packet_encrypt_worker, wg_packet_tx_worker pool 2: cpus=0 node=0 flags=0x0 nice=0 hung=0s workers=8 idle: 6611 6535 6134 6790 11 pool 6: cpus=1 node=0 flags=0x0 nice=0 hung=36s workers=8 idle: 6640 1781 6586 26 6579 pool 7: cpus=1 node=0 flags=0x0 nice=-20 hung=36s workers=2 idle: 25 pool 8: cpus=0-1 flags=0x6 nice=0 hung=4s workers=15 manager: 7962 pool 9: cpus=0-1 node=0 flags=0x4 nice=-20 hung=0s workers=8 idle: 6543 6541 52 6544 6532 6542 Showing backtraces of running workers in stalled CPU-bound worker pools: pool 6: task:kworker/1:5 state:R running task stack:0 pid:6593 tgid:6593 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: events_long defense_work_handler Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5357 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6961 preempt_schedule_common+0xe0/0x194 kernel/sched/core.c:7145 preempt_schedule+0x60/0x80 kernel/sched/core.c:7169 __local_bh_enable_ip+0x20c/0x35c kernel/softirq.c:414 local_bh_enable+0x28/0x34 include/linux/bottom_half.h:33 update_defense_level+0x5ec/0x984 net/netfilter/ipvs/ip_vs_ctl.c:210 defense_work_handler+0x30/0xdc net/netfilter/ipvs/ip_vs_ctl.c:235 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 pool 6: task:kworker/1:7 state:R running task stack:0 pid:6649 tgid:6649 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: wg-kex-wg2 wg_packet_handshake_receive_worker Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5357 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6961 preempt_schedule_common+0xe0/0x194 kernel/sched/core.c:7145 preempt_schedule+0x60/0x80 kernel/sched/core.c:7169 __local_bh_enable_ip+0x20c/0x35c kernel/softirq.c:414 local_bh_enable+0x28/0x34 include/linux/bottom_half.h:33 rcu_read_unlock_bh include/linux/rcupdate.h:910 [inline] wg_noise_handshake_begin_session+0x6cc/0x9c0 drivers/net/wireguard/noise.c:856 wg_packet_send_handshake_response+0xfc/0x24c drivers/net/wireguard/send.c:96 wg_receive_handshake_packet drivers/net/wireguard/receive.c:154 [inline] wg_packet_handshake_receive_worker+0x4fc/0xc20 drivers/net/wireguard/receive.c:213 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 pool 6: task:kworker/1:0 state:R running task stack:0 pid:24 tgid:24 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: events nsim_fib_event_work Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5357 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7058 schedule_timeout+0x128/0x270 kernel/time/sleep_timeout.c:99 schedule_timeout_uninterruptible+0x7c/0xc0 kernel/time/sleep_timeout.c:158 msleep+0x3c/0x68 kernel/time/sleep_timeout.c:318 nsim_fib6_rt_add drivers/net/netdevsim/fib.c:693 [inline] nsim_fib6_rt_insert drivers/net/netdevsim/fib.c:759 [inline] nsim_fib6_event drivers/net/netdevsim/fib.c:856 [inline] nsim_fib_event drivers/net/netdevsim/fib.c:889 [inline] nsim_fib_event_work+0x1bc4/0x25b8 drivers/net/netdevsim/fib.c:1493 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x990/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 pool 7: task:kworker/1:1H state:R running task stack:0 pid:56 tgid:56 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: kblockd blk_mq_timeout_work Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5357 [inline] __schedule+0x13b0/0x2864 kernel/sched/core.c:6961 __schedule_loop kernel/sched/core.c:7043 [inline] schedule+0xb4/0x230 kernel/sched/core.c:7058 schedule_timeout+0xac/0x270 kernel/time/sleep_timeout.c:75 do_wait_for_common+0x288/0x3f8 kernel/sched/completion.c:100 __wait_for_common kernel/sched/completion.c:121 [inline] wait_for_common kernel/sched/completion.c:132 [inline] wait_for_completion+0x44/0x5c kernel/sched/completion.c:153 synchronize_rcu_normal+0x1a0/0x234 kernel/rcu/tree.c:3296 synchronize_rcu+0x1ec/0x250 kernel/rcu/tree.c:3354 blk_mq_wait_quiesce_done block/blk-mq.c:285 [inline] blk_mq_timeout_work+0x13c/0x328 block/blk-mq.c:1742 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 bridge0: received packet on veth0_to_bridge with own address as source address (addr:e2:67:e8:a2:91:79, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:e2:67:e8:a2:91:79, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:e2:67:e8:a2:91:79, vlan:0)