BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 42s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x100
  pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=7 refcnt=8
    in-flight: 4831:switchdev_deferred_process_work for 49s switchdev_deferred_process_work ,1034:netdev_work_proc for 49s
    pending: nsim_dev_hwstats_traffic_work, 3*ovs_dp_masks_rebalance
  pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=18 refcnt=19
    in-flight: 24:nsim_fib_event_work for 47s ,26:nsim_fib_event_work for 46s
    pending: rht_deferred_worker, 3*nsim_dev_hwstats_traffic_work, psi_avgs_work, 4*ovs_dp_masks_rebalance, psi_avgs_work, ovs_dp_masks_rebalance, rht_deferred_worker, drm_fb_helper_damage_work, free_obj_work, 2*ovs_dp_masks_rebalance
workqueue events_long: flags=0x100
  pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=9 refcnt=10
    pending: 9*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=0x6 nice=0 active=8 refcnt=9
    in-flight: 5004:cfg80211_wiphy_work for 44s cfg80211_wiphy_work ,2642:linkwatch_event for 48s ,63:nsim_dev_trap_report_work for 11s ,12:nsim_dev_trap_report_work for 22s ,5007:nsim_dev_trap_report_work for 0s
    pending: nsim_dev_trap_report_work, toggle_allocation_gate
  pwq 8: cpus=0-1 flags=0x6 nice=0 active=2 refcnt=3
    in-flight: 3864:cfg80211_wiphy_work for 30s cfg80211_wiphy_work
workqueue events_power_efficient: flags=0x82
  pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2
    in-flight: 3662:neigh_periodic_work for 10s
workqueue netns: flags=0x6000a
  pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=4
    in-flight: 15:cleanup_net for 50s
workqueue mm_percpu_wq: flags=0x108
  pwq 6: cpus=1 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=4 MAYDAY
    in-flight: 33(RESCUER):wb_workfn for 40s
workqueue mld: flags=0x40108
  pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=1 refcnt=98
    in-flight: 4963:mld_dad_work for 42s
    inactive: mld_ifc_work, 2*mld_dad_work, 4*mld_ifc_work, 3*mld_dad_work, 5*mld_ifc_work, mld_dad_work, 4*mld_ifc_work, mld_dad_work, 7*mld_ifc_work, mld_dad_work, 3*mld_ifc_work, mld_dad_work, mld_ifc_work, 5*mld_dad_work, 7*mld_ifc_work, mld_dad_work, mld_ifc_work, 2*mld_dad_work, 2*mld_ifc_work, 2*mld_dad_work, mld_ifc_work, mld_dad_work, 2*mld_ifc_work, 3*mld_dad_work, 2*mld_ifc_work, mld_dad_work, 3*mld_ifc_work, 2*mld_dad_work, 6*mld_ifc_work, mld_dad_work, 7*mld_ifc_work, mld_dad_work, mld_ifc_work, mld_dad_work, 2*mld_ifc_work, mld_dad_work, 3*mld_ifc_work, mld_dad_work, 3*mld_ifc_work
workqueue ipv6_addrconf: flags=0x6000a
  pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=274
    in-flight: 39:addrconf_dad_work for 49s
    inactive: 270*addrconf_dad_work
workqueue bat_events: flags=0x6000a
  pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=49
    in-flight: 2851(RESCUER):batadv_tt_purge for 0s
    inactive: 3*batadv_tt_purge, 2*batadv_iv_send_outstanding_bat_ogm_packet, batadv_purge_orig, 2*batadv_iv_send_outstanding_bat_ogm_packet, 2*batadv_purge_orig, 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_dat_purge, batadv_bla_periodic_work, 6*batadv_mcast_mla_update, batadv_iv_send_outstanding_bat_ogm_packet, batadv_purge_orig, 6*batadv_iv_send_outstanding_bat_ogm_packet, 2*batadv_purge_orig, 5*batadv_iv_send_outstanding_bat_ogm_packet, batadv_tt_purge
workqueue wg-crypt-wg0: flags=0x128
  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=0x128
  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-wg2: flags=0x128
  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-wg0: flags=0x6
  pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2
    in-flight: 3889:wg_packet_handshake_send_worker for 3s
workqueue wg-crypt-wg0: flags=0x128
  pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=1 refcnt=2
    pending: wg_packet_tx_worker
workqueue wg-crypt-wg1: flags=0x128
  pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=1 refcnt=2
    pending: wg_packet_encrypt_worker
workqueue wg-kex-wg0: flags=0x124
  pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=2
    in-flight: 5002:wg_packet_handshake_receive_worker for 1s
  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=0x128
  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-wg1: flags=0x124
  pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=2
    in-flight: 9:wg_packet_handshake_receive_worker for 4s
  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=0x128
  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-kex-wg2: flags=0x124
  pwq 2: cpus=0 node=0 flags=0x2 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=0x128
  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-kex-wg0: flags=0x124
  pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=2
    in-flight: 5005:wg_packet_handshake_receive_worker for 3s
  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=2 refcnt=3
    in-flight: 1209:wg_packet_handshake_send_worker for 9s ,40:wg_packet_handshake_send_worker for 3s
workqueue wg-crypt-wg0: flags=0x128
  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-wg1: flags=0x124
  pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=2
    in-flight: 5006:wg_packet_handshake_receive_worker for 12s
  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=0x128
  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=0x124
  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=0x128
  pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=3 refcnt=4
    pending: wg_packet_decrypt_worker, wg_packet_tx_worker, wg_packet_encrypt_worker
pool 2: cpus=0 node=0 flags=0x2 nice=0 hung=0s workers=7 manager: 11
pool 6: cpus=1 node=0 flags=0x0 nice=0 hung=42s workers=8 idle: 867 4838 4477 4955 4956
pool 8: cpus=0-1 flags=0x6 nice=0 hung=0s workers=14 manager: 5008 idle: 3824
Showing backtraces of busy workers in stalled worker pools:
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+0x2b0/0x6e0 arch/arm64/kernel/process.c:775 (T)
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1370/0x2d80 kernel/sched/core.c:7234
 __schedule_loop kernel/sched/core.c:7311 [inline]
 schedule+0x13c/0x20c kernel/sched/core.c:7326
 schedule_timeout+0x13c/0x28c kernel/time/sleep_timeout.c:99
 schedule_timeout_uninterruptible+0x78/0xbc kernel/time/sleep_timeout.c:158
 msleep+0x3c/0x68 kernel/time/sleep_timeout.c:318
 nsim_fib4_rt_add drivers/net/netdevsim/fib.c:369 [inline]
 nsim_fib4_rt_insert drivers/net/netdevsim/fib.c:432 [inline]
 nsim_fib4_event drivers/net/netdevsim/fib.c:464 [inline]
 nsim_fib_event+0x5564/0x60c4 drivers/net/netdevsim/fib.c:884
 nsim_fib_event_work+0x1d8/0x320 drivers/net/netdevsim/fib.c:1493
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
pool 6:
task:kworker/1:7     state:R  running task     stack:0     pid:4963  tgid:4963  ppid:2      task_flags:0x4208060 flags:0x00000010
Workqueue: mld mld_dad_work
Call trace:
 __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:775 (T)
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1370/0x2d80 kernel/sched/core.c:7234
 preempt_schedule_common+0xd4/0x190 kernel/sched/core.c:7413
 preempt_schedule+0x60/0x78 kernel/sched/core.c:7437
 __local_bh_enable_ip+0x20c/0x35c kernel/softirq.c:457
 __raw_read_unlock_bh include/linux/rwlock_api_smp.h:283 [inline]
 _raw_read_unlock_bh+0x3c/0x4c kernel/locking/spinlock.c:288
 ipv6_get_lladdr+0x284/0x3c0 net/ipv6/addrconf.c:1951
 mld_newpack+0x368/0x7b0 net/ipv6/mcast.c:1803
 add_grhead+0x6c/0x260 net/ipv6/mcast.c:1900
 add_grec+0xf9c/0x1214 net/ipv6/mcast.c:2039
 mld_send_initial_cr+0x168/0x2fc net/ipv6/mcast.c:2284
 mld_dad_work+0x40/0x1d8 net/ipv6/mcast.c:2310
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842
pool 6:
task:kworker/1:1     state:R  running task     stack:0     pid:26    tgid:26    ppid:2      task_flags:0x4208060 flags:0x00000010
Workqueue: events nsim_fib_event_work
Call trace:
 __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:775 (T)
 context_switch kernel/sched/core.c:5510 [inline]
 __schedule+0x1370/0x2d80 kernel/sched/core.c:7234
 preempt_schedule_common+0xd4/0x190 kernel/sched/core.c:7413
 preempt_schedule+0x60/0x78 kernel/sched/core.c:7437
 __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
 _raw_spin_unlock_irqrestore+0x94/0x98 kernel/locking/spinlock.c:198
 __debug_check_no_obj_freed lib/debugobjects.c:1180 [inline]
 debug_check_no_obj_freed+0x2c8/0x3a4 lib/debugobjects.c:1201
 __free_pages_prepare mm/page_alloc.c:1413 [inline]
 __free_frozen_pages+0x4b8/0xbb8 mm/page_alloc.c:2950
 free_frozen_pages+0x14/0x20 mm/page_alloc.c:2988
 __free_slab+0x11c/0x1b4 mm/slub.c:3469
 free_slab+0x2c/0x154 mm/slub.c:3503
 discard_slab+0x48/0x90 mm/slub.c:3509
 __slab_free+0x1a0/0x1d0 mm/slub.c:5767
 ___cache_free+0x80/0x94 mm/slub.c:6477
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0xb4/0x120 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x118/0x124 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x2c/0x88 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4612 [inline]
 slab_alloc_node mm/slub.c:4945 [inline]
 __kmalloc_cache_noprof+0x268/0x5ec mm/slub.c:5511
 _kmalloc_noprof include/linux/slab.h:969 [inline]
 _kzalloc_noprof include/linux/slab.h:1290 [inline]
 nsim_fib6_rt_create drivers/net/netdevsim/fib.c:547 [inline]
 nsim_fib6_rt_insert drivers/net/netdevsim/fib.c:752 [inline]
 nsim_fib6_event drivers/net/netdevsim/fib.c:856 [inline]
 nsim_fib_event+0xa04/0x60c4 drivers/net/netdevsim/fib.c:889
 nsim_fib_event_work+0x1d8/0x320 drivers/net/netdevsim/fib.c:1493
 process_one_work kernel/workqueue.c:3322 [inline]
 process_scheduled_works+0x788/0x10b8 kernel/workqueue.c:3405
 worker_thread+0x798/0xbd0 kernel/workqueue.c:3486
 kthread+0x304/0x3d4 kernel/kthread.c:436
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:842