BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 32s! Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=7 refcnt=8 in-flight: 3916:nsim_fib_event_work nsim_fib_event_work pending: nsim_dev_hwstats_traffic_work, psi_avgs_work, vmstat_shepherd, psi_avgs_work, delayed_vfree_work pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=4 refcnt=5 pending: nsim_dev_hwstats_traffic_work, drm_fb_helper_damage_work, free_obj_work, ovs_dp_masks_rebalance workqueue events_long: flags=0x0 pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: 2*defense_work_handler workqueue events_unbound: flags=0x2 pwq 8: cpus=0-1 flags=0x4 nice=0 active=2 refcnt=3 in-flight: 41:nsim_dev_trap_report_work pending: toggle_allocation_gate pwq 8: cpus=0-1 flags=0x4 nice=0 active=6 refcnt=7 in-flight: 208:cfg80211_wiphy_work cfg80211_wiphy_work ,2024:cfg80211_wiphy_work cfg80211_wiphy_work ,12:nsim_dev_trap_report_work pending: flush_memcg_stats_dwork workqueue events_power_efficient: flags=0x82 pwq 8: cpus=0-1 flags=0x4 nice=0 active=1 refcnt=2 pending: fb_flashcursor workqueue mm_percpu_wq: flags=0x8 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: vmstat_update pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: vmstat_update workqueue mld: flags=0x40008 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=4 in-flight: 6292:mld_dad_work inactive: 2*mld_dad_work pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=1 refcnt=29 in-flight: 6634:mld_ifc_work inactive: 2*mld_ifc_work, mld_dad_work, 2*mld_ifc_work, 2*mld_dad_work, 4*mld_ifc_work, mld_dad_work, 2*mld_ifc_work, mld_dad_work, mld_ifc_work, mld_dad_work, 10*mld_ifc_work workqueue ipv6_addrconf: flags=0x6000a pwq 8: cpus=0-1 flags=0x4 nice=0 active=1 refcnt=86 in-flight: 310:addrconf_dad_work inactive: 82*addrconf_dad_work workqueue krxrpcd: flags=0x2001a pwq 9: cpus=0-1 node=0 flags=0x4 nice=-20 active=1 refcnt=4 pending: rxrpc_peer_keepalive_worker workqueue bat_events: flags=0x6000a pwq 8: cpus=0-1 flags=0x4 nice=0 active=1 refcnt=11 in-flight: 65:batadv_dat_purge inactive: batadv_bla_periodic_work, batadv_nc_worker, batadv_mcast_mla_update, batadv_purge_orig, 3*batadv_iv_send_outstanding_bat_ogm_packet workqueue wg-kex-wg0: flags=0x24 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=2 refcnt=3 in-flight: 11:wg_packet_handshake_receive_worker pending: wg_packet_handshake_receive_worker pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-crypt-wg0: flags=0x28 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=2 refcnt=3 pending: wg_packet_tx_worker, wg_packet_encrypt_worker 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-kex-wg1: flags=0x24 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 in-flight: 6760:wg_packet_handshake_receive_worker pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-crypt-wg1: flags=0x28 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: wg_packet_tx_worker 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-kex-wg2: flags=0x24 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: wg_packet_handshake_receive_worker workqueue wg-crypt-wg2: flags=0x28 pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: wg_packet_tx_worker pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=1 refcnt=2 pending: wg_packet_encrypt_worker pool 2: cpus=0 node=0 flags=0x0 nice=0 hung=1s workers=6 idle: 6759 9 pool 6: cpus=1 node=0 flags=0x0 nice=0 hung=32s workers=6 idle: 24 2287 26 6756 6672 pool 8: cpus=0-1 flags=0x4 nice=0 hung=0s workers=11 idle: 646 703 42 6757 13 Showing backtraces of running workers in stalled CPU-bound worker pools: pool 6: task:kworker/1:3 state:R running task stack:0 pid:6634 tgid:6634 ppid:2 task_flags:0x4208060 flags:0x00000010 Workqueue: mld mld_ifc_work Call trace: __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T) context_switch kernel/sched/core.c:5397 [inline] __schedule+0x141c/0x2a14 kernel/sched/core.c:6786 preempt_schedule_common+0xe0/0x194 kernel/sched/core.c:6966 preempt_schedule+0x60/0x80 kernel/sched/core.c:6990 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] _raw_spin_unlock_irqrestore+0x94/0x98 kernel/locking/spinlock.c:194 __debug_check_no_obj_freed lib/debugobjects.c:1108 [inline] debug_check_no_obj_freed+0x454/0x470 lib/debugobjects.c:1129 free_pages_prepare mm/page_alloc.c:1255 [inline] __free_frozen_pages+0x4cc/0xd2c mm/page_alloc.c:2706 free_frozen_pages+0x14/0x20 mm/page_alloc.c:2744 __free_slab+0x110/0x1e8 mm/slub.c:2688 free_slab+0x24/0x120 mm/slub.c:2711 discard_slab mm/slub.c:2717 [inline] __put_partials+0x19c/0x244 mm/slub.c:3186 put_cpu_partial+0x164/0x1c0 mm/slub.c:3261 __slab_free+0x1b0/0x280 mm/slub.c:4513 do_slab_free mm/slub.c:4595 [inline] ___cache_free+0x150/0x170 mm/slub.c:4701 qlink_free+0x48/0x94 mm/kasan/quarantine.c:163 qlist_free_all+0x44/0xb8 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x118/0x124 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x2c/0x88 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4148 [inline] slab_alloc_node mm/slub.c:4197 [inline] kmem_cache_alloc_node_noprof+0x240/0x3f4 mm/slub.c:4249 __alloc_skb+0x144/0x2ec net/core/skbuff.c:660 alloc_skb include/linux/skbuff.h:1336 [inline] mld_newpack+0x130/0xa28 net/ipv6/mcast.c:1788 add_grhead+0x6c/0x25c net/ipv6/mcast.c:1899 add_grec+0x1144/0x1324 net/ipv6/mcast.c:2037 mld_send_cr net/ipv6/mcast.c:2163 [inline] mld_ifc_work+0x628/0xce8 net/ipv6/mcast.c:2702 process_one_work+0x7e8/0x155c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3321 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3402 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844