* [syzbot] [wireless?] BUG: workqueue lockup in reg_todo
@ 2026-09-23 7:59 syzbot
2026-11-06 7:53 ` syzbot
0 siblings, 1 reply; 2+ messages in thread
From: syzbot @ 2026-09-23 7:59 UTC (permalink / raw)
To: davem, edumazet, horms, kuba, linux-kernel, linux-wireless,
netdev, pabeni, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: 38872197cae2 Merge branch 'for-next/fixes' into for-kernelci
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=17105405580000
kernel config: https://syzkaller.appspot.com/x/.config?x=56ed23170c168d4c
dashboard link: https://syzkaller.appspot.com/bug?extid=b733a65a200ab7aa2cbe
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
userspace arch: arm64
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c5963fdd6790/disk-38872197.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a8c2cab00c45/vmlinux-38872197.xz
kernel image: https://storage.googleapis.com/syzbot-assets/bde15d173380/Image-38872197.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b733a65a200ab7aa2cbe@syzkaller.appspotmail.com
sched: DL replenish lagged too much
BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 35s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x100
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=18 refcnt=19
in-flight: 9:reg_todo for 39s
pending: 2*psi_avgs_work, 6*nsim_dev_hwstats_traffic_work, free_obj_work, 3*psi_avgs_work, delayed_vfree_work, vmstat_shepherd, 3*ovs_dp_masks_rebalance
pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=9 refcnt=10
pending: 4*nsim_dev_hwstats_traffic_work, 4*ovs_dp_masks_rebalance, psi_avgs_work
workqueue events_unbound: flags=0x2
pwq 8: cpus=0-1 flags=0x4 nice=0 active=9 refcnt=10
in-flight: 237:cfg80211_wiphy_work for 62s cfg80211_wiphy_work ,14:nsim_dev_trap_report_work for 14s ,6551:cfg80211_wiphy_work for 65s cfg80211_wiphy_work ,6553:cfg80211_wiphy_work for 10s ,6550:nsim_dev_trap_report_work for 7s
pending: 2*nsim_dev_trap_report_work
pwq 8: cpus=0-1 flags=0x4 nice=0 active=12 refcnt=13
in-flight: 6552:nsim_dev_trap_report_work for 9s ,40:cfg80211_wiphy_work for 59s cfg80211_wiphy_work ,3416:cfg80211_wiphy_work for 59s cfg80211_wiphy_work ,3118:cfg80211_wiphy_work for 2s ,6548:toggle_allocation_gate for 8s ,524:cfg80211_wiphy_work for 17s ,6554:nsim_dev_trap_report_work for 4s
pending: 3*nsim_dev_trap_report_work
workqueue events_power_efficient: flags=0x82
pwq 8: cpus=0-1 flags=0x4 nice=0 active=4 refcnt=5
in-flight: 5258:reg_check_chans_work for 9s ,373:neigh_periodic_work for 30s ,49:wg_ratelimiter_gc_entries for 1s
pending: neigh_periodic_work
pwq 8: cpus=0-1 flags=0x4 nice=0 active=2 refcnt=3
in-flight: 6555:gc_worker for 8s ,6549:hash_ipportnet6_gc for 4s
workqueue events_dfl_long: flags=0x2
pwq 8: cpus=0-1 flags=0x4 nice=0 active=7 refcnt=8
pending: 7*defense_work_handler
pwq 8: cpus=0-1 flags=0x4 nice=0 active=1 refcnt=2
in-flight: 5257:defense_work_handler for 8s
workqueue netns: flags=0x6000a
pwq 8: cpus=0-1 flags=0x4 nice=0 active=1 refcnt=5
in-flight: 5259:cleanup_net for 74s
inactive: cleanup_net
workqueue mm_percpu_wq: flags=0x108
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 writeback: flags=0x4a
pwq 8: cpus=0-1 flags=0x4 nice=0 active=1 refcnt=2
in-flight: 289:wb_workfn for 64s
workqueue ipv6_addrconf: flags=0x6000a
pwq 8: cpus=0-1 flags=0x4 nice=0 active=1 refcnt=7
in-flight: 134:addrconf_dad_work for 39s
inactive: 3*addrconf_dad_work
workqueue bat_events: flags=0x6000a
pwq 8: cpus=0-1 flags=0x4 nice=0 active=1 refcnt=51
in-flight: 6547:batadv_tt_purge for 11s
inactive: 2*batadv_tt_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_tt_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_mcast_mla_update, 2*batadv_tt_purge, batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_bla_periodic_work, batadv_mcast_mla_update, batadv_bla_periodic_work, batadv_dat_purge, 4*batadv_mcast_mla_update, 5*batadv_iv_send_outstanding_bat_ogm_packet, 3*batadv_purge_orig, batadv_iv_send_outstanding_bat_ogm_packet, 3*batadv_purge_orig, 12*batadv_iv_send_outstanding_bat_ogm_packet
workqueue wg-crypt-wg0: 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
pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=1 refcnt=2
pending: wg_packet_encrypt_worker
workqueue wg-crypt-wg1: flags=0x128
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2
pending: wg_packet_encrypt_worker
workqueue wg-kex-wg0: flags=0x6
pwq 8: cpus=0-1 flags=0x4 nice=0 active=1 refcnt=2
in-flight: 6546:wg_packet_handshake_send_worker for 0s
workqueue wg-crypt-wg0: flags=0x128
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=2 refcnt=3
pending: wg_packet_tx_worker, wg_packet_encrypt_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-wg1: 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-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-kex-wg0: flags=0x124
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2
pending: wg_packet_handshake_receive_worker
workqueue wg-crypt-wg0: flags=0x128
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=3 refcnt=4
pending: wg_packet_tx_worker, wg_packet_encrypt_worker, wg_packet_decrypt_worker
workqueue wg-kex-wg2: flags=0x124
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2
pending: wg_packet_handshake_receive_worker
workqueue wg-crypt-wg2: flags=0x128
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2
pending: wg_packet_encrypt_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
pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=1 refcnt=2
pending: wg_packet_encrypt_worker
workqueue wg-kex-wg1: flags=0x124
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2
pending: wg_packet_handshake_receive_worker
workqueue wg-crypt-wg1: flags=0x128
pwq 2: cpus=0 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=0x0 nice=0 active=1 refcnt=2
pending: wg_packet_handshake_receive_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_decrypt_worker, wg_packet_encrypt_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_tx_worker, wg_packet_encrypt_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-kex-wg1: flags=0x124
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2
pending: wg_packet_handshake_receive_worker
workqueue wg-crypt-wg1: flags=0x128
pwq 2: cpus=0 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=0x0 nice=0 active=1 refcnt=2
pending: wg_packet_handshake_receive_worker
workqueue wg-kex-wg2: flags=0x6
pwq 8: cpus=0-1 flags=0x4 nice=0 active=1 refcnt=2
in-flight: 394:wg_packet_handshake_send_worker for 3s
workqueue wg-crypt-wg2: flags=0x128
pwq 2: cpus=0 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=35s workers=7 idle: 4802 4872 10 4820 870 4902
pool 8: cpus=0-1 flags=0x4 nice=0 hung=0s workers=25 idle: 12
Showing backtraces of busy workers in stalled worker pools:
pool 2:
task:kworker/0:0 state:R running task stack:0 pid:9 tgid:9 ppid:2 task_flags:0x4208060 flags:0x00000010
Workqueue: events reg_todo
Call trace:
__switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:775 (T)
context_switch kernel/sched/core.c:5526 [inline]
__schedule+0x1370/0x2d80 kernel/sched/core.c:7277
preempt_schedule_common+0xd4/0x190 kernel/sched/core.c:7456
preempt_schedule+0x60/0x78 kernel/sched/core.c:7480
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:211 [inline]
_raw_spin_unlock_irqrestore+0x94/0x98 kernel/locking/spinlock.c:221
spin_unlock_irqrestore include/linux/spinlock.h:425 [inline]
__slab_free+0x194/0x1d0 mm/slub.c:5821
___cache_free+0x80/0x94 mm/slub.c:6580
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:4683 [inline]
slab_alloc_node mm/slub.c:4996 [inline]
kmem_cache_alloc_noprof+0x268/0x5d4 mm/slub.c:5010
skb_clone+0x1ac/0x320 net/core/skbuff.c:2119
do_one_broadcast net/netlink/af_netlink.c:1456 [inline]
netlink_broadcast_filtered+0x520/0xd58 net/netlink/af_netlink.c:1539
netlink_broadcast+0x50/0x68 net/netlink/af_netlink.c:1563
uevent_net_broadcast_untagged lib/kobject_uevent.c:331 [inline]
kobject_uevent_net_broadcast+0x33c/0x53c lib/kobject_uevent.c:410
kobject_uevent_env+0x518/0x944 lib/kobject_uevent.c:611
call_crda net/wireless/reg.c:574 [inline]
reg_query_database+0x278/0x4e4 net/wireless/reg.c:1116
reg_process_hint_core net/wireless/reg.c:2681 [inline]
reg_process_hint+0x1b8/0x990 net/wireless/reg.c:3027
reg_process_pending_hints net/wireless/reg.c:3115 [inline]
reg_todo+0x168/0x6a4 net/wireless/reg.c:3206
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3479
worker_thread+0x798/0xbd0 kernel/workqueue.c:3560
kthread+0x304/0x3d4 kernel/kthread.c:436
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838
---
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [syzbot] [wireless?] BUG: workqueue lockup in reg_todo
2026-09-23 7:59 [syzbot] [wireless?] BUG: workqueue lockup in reg_todo syzbot
@ 2026-11-06 7:53 ` syzbot
0 siblings, 0 replies; 2+ messages in thread
From: syzbot @ 2026-11-06 7:53 UTC (permalink / raw)
To: davem, edumazet, horms, johannes, kuba, linux-kernel,
linux-wireless, netdev, pabeni, syzkaller-bugs
syzbot has found a reproducer for the following issue on:
HEAD commit: b0958b1397fb arm64: mm: validate /dev/mem mmap ranges with..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=16e972fd580000
kernel config: https://syzkaller.appspot.com/x/.config?x=a58b6b4d667e7a61
dashboard link: https://syzkaller.appspot.com/bug?extid=b733a65a200ab7aa2cbe
compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8
userspace arch: arm64
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17f70e55580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/a1caa79f24c0/disk-b0958b13.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/99b068dd4197/vmlinux-b0958b13.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e135f96e545e/Image-b0958b13.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+b733a65a200ab7aa2cbe@syzkaller.appspotmail.com
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
BUG: workqueue lockup - pool cpus=0 node=0 flags=0x0 nice=0 stuck for 33s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x100
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=14 refcnt=15
in-flight: 4993:reg_todo for 33s ,1104:nsim_fib_event_work for 111s nsim_fib_event_work ,9:nsim_fib_event_work for 110s nsim_fib_event_work ,4754:nsim_fib_event_work for 111s nsim_fib_event_work
pending: rht_deferred_worker, 2*nsim_dev_hwstats_traffic_work, vmstat_shepherd, drm_fb_helper_damage_work, free_obj_work, psi_avgs_work
pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=3 refcnt=4
in-flight: 879:switchdev_deferred_process_work for 63s
pending: nsim_dev_hwstats_traffic_work, psi_avgs_work
workqueue events_unbound: flags=0x2
pwq 8: cpus=0-1 flags=0x6 nice=0 active=2 refcnt=3
in-flight: 292:cfg80211_wiphy_work for 98s cfg80211_wiphy_work
pwq 8: cpus=0-1 flags=0x6 nice=0 active=12 refcnt=13
in-flight: 384:cfg80211_wiphy_work for 97s cfg80211_wiphy_work ,323:linkwatch_event for 42s ,40:cfg80211_wiphy_work for 109s cfg80211_wiphy_work ,120:cfg80211_wiphy_work for 110s cfg80211_wiphy_work
pending: 3*nsim_dev_trap_report_work, toggle_allocation_gate, flush_memcg_stats_dwork
workqueue events_power_efficient: flags=0x82
pwq 8: cpus=0-1 flags=0x6 nice=0 active=2 refcnt=3
in-flight: 5038:gc_worker for 6s
pending: fb_flashcursor
workqueue events_dfl_long: flags=0x2
pwq 8: cpus=0-1 flags=0x6 nice=0 active=2 refcnt=3
in-flight: 56:defense_work_handler for 0s
pending: defense_work_handler
workqueue netns: flags=0x6000a
pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=4
in-flight: 61:cleanup_net for 112s
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: 12:wb_workfn for 106s
workqueue mld: flags=0x40108
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=70
pending: mld_ifc_work
inactive: 2*mld_ifc_work, 3*mld_dad_work, mld_ifc_work, mld_dad_work, 2*mld_ifc_work, mld_dad_work, 2*mld_ifc_work, mld_dad_work, 3*mld_ifc_work, mld_dad_work, 2*mld_ifc_work, 6*mld_dad_work, 8*mld_ifc_work, mld_dad_work, mld_ifc_work, 2*mld_dad_work, mld_ifc_work, mld_dad_work, 4*mld_ifc_work, mld_dad_work, 8*mld_ifc_work, mld_dad_work, mld_ifc_work, mld_dad_work, 7*mld_ifc_work, 6*mld_dad_work
workqueue ipv6_addrconf: flags=0x6000a
pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=121 MAYDAY
in-flight: 59(RESCUER):addrconf_dad_work for 63s
inactive: 115*addrconf_dad_work
workqueue bat_events: flags=0x6000a
pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=49 MAYDAY
in-flight: 2871(RESCUER):batadv_tt_purge for 0s
pending: mayday_cursor_func
inactive: batadv_tt_purge, 2*batadv_mcast_mla_update, batadv_iv_send_outstanding_bat_ogm_packet, batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_bla_periodic_work, batadv_mcast_mla_update, batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_bla_periodic_work, batadv_iv_send_outstanding_bat_ogm_packet, batadv_purge_orig, batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_bla_periodic_work, 2*batadv_iv_send_outstanding_bat_ogm_packet, batadv_purge_orig, batadv_iv_send_outstanding_bat_ogm_packet, 3*batadv_mcast_mla_update, 2*batadv_iv_send_outstanding_bat_ogm_packet, batadv_purge_orig, 5*batadv_iv_send_outstanding_bat_ogm_packet, 3*batadv_purge_orig, 3*batadv_iv_send_outstanding_bat_ogm_packet, 3*batadv_tt_purge
workqueue wg-kex-wg0: flags=0x124
pwq 2: cpus=0 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
in-flight: 5036:wg_packet_handshake_send_worker for 4s
workqueue wg-crypt-wg0: flags=0x128
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=4 refcnt=5
in-flight: 4970:wg_packet_tx_worker for 35s
pending: wg_packet_decrypt_worker, wg_packet_tx_worker, wg_packet_encrypt_worker
workqueue wg-kex-wg1: flags=0x124
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2
pending: wg_packet_handshake_receive_worker
workqueue wg-crypt-wg1: flags=0x128
pwq 2: cpus=0 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=0x0 nice=0 active=2 refcnt=3
in-flight: 4870:wg_packet_handshake_receive_worker for 50s
pending: wg_packet_handshake_receive_worker
pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=2 refcnt=3
in-flight: 26:wg_packet_handshake_receive_worker for 55s wg_packet_handshake_receive_worker
workqueue wg-crypt-wg2: flags=0x128
pwq 2: cpus=0 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=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
in-flight: 13:wg_packet_handshake_send_worker for 2s
workqueue wg-crypt-wg0: flags=0x128
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=4 refcnt=5
in-flight: 10:wg_packet_tx_worker for 35s
pending: wg_packet_encrypt_worker, wg_packet_decrypt_worker, wg_packet_tx_worker
workqueue wg-kex-wg1: flags=0x124
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2
pending: wg_packet_handshake_receive_worker
workqueue wg-crypt-wg1: flags=0x128
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=3 refcnt=4
pending: wg_packet_decrypt_worker, wg_packet_tx_worker, wg_packet_encrypt_worker
workqueue wg-kex-wg2: flags=0x124
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=1 refcnt=2
pending: wg_packet_handshake_receive_worker
workqueue wg-crypt-wg2: 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-kex-wg0: flags=0x124
pwq 2: cpus=0 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
in-flight: 5037:wg_packet_handshake_send_worker for 0s
workqueue wg-crypt-wg0: flags=0x128
pwq 2: cpus=0 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-wg1: flags=0x128
pwq 2: cpus=0 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-kex-wg2: flags=0x124
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=2 refcnt=3
in-flight: 4872:wg_packet_handshake_receive_worker for 35s
pending: wg_packet_handshake_receive_worker
workqueue wg-crypt-wg2: flags=0x128
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=2 refcnt=3
pending: wg_packet_tx_worker, wg_packet_encrypt_worker
pool 2: cpus=0 node=0 flags=0x0 nice=0 hung=33s workers=9 idle: 4473
pool 6: cpus=1 node=0 flags=0x0 nice=0 hung=0s workers=6 idle: 24 5039 4851 4994
pool 8: cpus=0-1 flags=0x6 nice=0 hung=0s workers=13 manager: 5040
Showing backtraces of busy workers in stalled worker pools:
pool 2:
task:kworker/0:8 state:R running task stack:0 pid:4993 tgid:4993 ppid:2 task_flags:0x4208060 flags:0x00000010
Workqueue: events reg_todo
Call trace:
__switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:792 (T)
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x1368/0x2b50 kernel/sched/core.c:7382
preempt_schedule_common+0xd4/0x190 kernel/sched/core.c:7561
preempt_schedule+0x60/0x78 kernel/sched/core.c:7585
__local_bh_enable_ip+0x16c/0x234 kernel/softirq.c:480
local_bh_enable include/linux/bottom_half.h:33 [inline]
__alloc_skb+0x1c8/0x610 net/core/skbuff.c:700
alloc_skb include/linux/skbuff.h:1390 [inline]
alloc_uevent_skb+0x78/0x1ec lib/kobject_uevent.c:289
uevent_net_broadcast_untagged lib/kobject_uevent.c:326 [inline]
kobject_uevent_net_broadcast+0x2d4/0x53c lib/kobject_uevent.c:410
kobject_uevent_env+0x518/0x944 lib/kobject_uevent.c:611
call_crda net/wireless/reg.c:575 [inline]
reg_query_database+0x2b8/0x514 net/wireless/reg.c:1128
reg_process_hint_core net/wireless/reg.c:2744 [inline]
reg_process_hint+0x1b8/0x9d4 net/wireless/reg.c:3091
reg_process_pending_hints net/wireless/reg.c:3184 [inline]
reg_todo+0x1cc/0x848 net/wireless/reg.c:3275
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3578
worker_thread+0x798/0xbd0 kernel/workqueue.c:3659
kthread+0x304/0x3d4 kernel/kthread.c:436
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854
pool 2:
task:kworker/0:2 state:R running task stack:0 pid:1104 tgid:1104 ppid:2 task_flags:0x4208060 flags:0x00000010
Workqueue: events nsim_fib_event_work
Call trace:
__switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:792 (T)
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x1368/0x2b50 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x13c/0x20c kernel/sched/core.c:7474
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:3495 [inline]
process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3578
worker_thread+0x798/0xbd0 kernel/workqueue.c:3659
kthread+0x304/0x3d4 kernel/kthread.c:436
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854
pool 2:
task:kworker/0:5 state:R running task stack:0 pid:4870 tgid:4870 ppid:2 task_flags:0x4208060 flags:0x00000010
Workqueue: wg-kex-wg2 wg_packet_handshake_receive_worker
Call trace:
__switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:792 (T)
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x1368/0x2b50 kernel/sched/core.c:7382
preempt_schedule_common+0xd4/0x190 kernel/sched/core.c:7561
preempt_schedule+0x60/0x78 kernel/sched/core.c:7585
__local_bh_enable_ip+0x16c/0x234 kernel/softirq.c:480
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:923 [inline]
wg_noise_handshake_begin_session+0x698/0x958 drivers/net/wireguard/noise.c:855
wg_packet_send_handshake_response+0x108/0x264 drivers/net/wireguard/send.c:96
wg_receive_handshake_packet drivers/net/wireguard/receive.c:154 [inline]
wg_packet_handshake_receive_worker+0x570/0xcf8 drivers/net/wireguard/receive.c:213
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3578
worker_thread+0x798/0xbd0 kernel/workqueue.c:3659
kthread+0x304/0x3d4 kernel/kthread.c:436
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854
pool 2:
task:kworker/0:1 state:R running task stack:0 pid:10 tgid:10 ppid:2 task_flags:0x4208060 flags:0x00000010
Workqueue: wg-crypt-wg0 wg_packet_tx_worker
Call trace:
__switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:792 (T)
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x1368/0x2b50 kernel/sched/core.c:7382
preempt_schedule_common+0xd4/0x190 kernel/sched/core.c:7561
preempt_schedule+0x60/0x78 kernel/sched/core.c:7585
__local_bh_enable_ip+0x16c/0x234 kernel/softirq.c:480
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:923 [inline]
mod_peer_timer+0x21c/0x25c drivers/net/wireguard/timers.c:38
wg_timers_any_authenticated_packet_traversal+0x98/0xc0 drivers/net/wireguard/timers.c:218
wg_packet_create_data_done drivers/net/wireguard/send.c:247 [inline]
wg_packet_tx_worker+0x130/0x75c drivers/net/wireguard/send.c:276
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3578
worker_thread+0x798/0xbd0 kernel/workqueue.c:3659
kthread+0x304/0x3d4 kernel/kthread.c:436
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854
pool 2:
task:kworker/0:7 state:R running task stack:0 pid:4970 tgid:4970 ppid:2 task_flags:0x4208060 flags:0x00000010
Workqueue: wg-crypt-wg0 wg_packet_tx_worker
Call trace:
__switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:792 (T)
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x1368/0x2b50 kernel/sched/core.c:7382
preempt_schedule_common+0xd4/0x190 kernel/sched/core.c:7561
preempt_schedule+0x60/0x78 kernel/sched/core.c:7585
__local_bh_enable_ip+0x16c/0x234 kernel/softirq.c:480
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:923 [inline]
mod_peer_timer+0x21c/0x25c drivers/net/wireguard/timers.c:38
wg_timers_any_authenticated_packet_traversal+0x98/0xc0 drivers/net/wireguard/timers.c:218
wg_packet_create_data_done drivers/net/wireguard/send.c:247 [inline]
wg_packet_tx_worker+0x130/0x75c drivers/net/wireguard/send.c:276
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3578
worker_thread+0x798/0xbd0 kernel/workqueue.c:3659
kthread+0x304/0x3d4 kernel/kthread.c:436
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854
pool 2:
task:kworker/0:6 state:R running task stack:0 pid:4872 tgid:4872 ppid:2 task_flags:0x4208060 flags:0x00000010
Workqueue: wg-kex-wg2 wg_packet_handshake_receive_worker
Call trace:
__switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:792 (T)
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x1368/0x2b50 kernel/sched/core.c:7382
preempt_schedule_common+0xd4/0x190 kernel/sched/core.c:7561
preempt_schedule+0x60/0x78 kernel/sched/core.c:7585
__local_bh_enable_ip+0x16c/0x234 kernel/softirq.c:480
local_bh_enable include/linux/bottom_half.h:33 [inline]
rcu_read_unlock_bh include/linux/rcupdate.h:923 [inline]
mod_peer_timer+0x21c/0x25c drivers/net/wireguard/timers.c:38
wg_timers_session_derived+0x5c/0x6c drivers/net/wireguard/timers.c:208
wg_packet_send_handshake_response+0x118/0x264 drivers/net/wireguard/send.c:98
wg_receive_handshake_packet drivers/net/wireguard/receive.c:154 [inline]
wg_packet_handshake_receive_worker+0x570/0xcf8 drivers/net/wireguard/receive.c:213
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3578
worker_thread+0x798/0xbd0 kernel/workqueue.c:3659
kthread+0x304/0x3d4 kernel/kthread.c:436
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854
pool 2:
task:kworker/0:0 state:R running task stack:0 pid:9 tgid:9 ppid:2 task_flags:0x4208060 flags:0x00000010
Workqueue: events nsim_fib_event_work
Call trace:
__switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:792 (T)
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x1368/0x2b50 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x13c/0x20c kernel/sched/core.c:7474
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_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+0x57a0/0x60c4 drivers/net/netdevsim/fib.c:889
nsim_fib_event_work+0x1d8/0x320 drivers/net/netdevsim/fib.c:1493
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3578
worker_thread+0x798/0xbd0 kernel/workqueue.c:3659
kthread+0x304/0x3d4 kernel/kthread.c:436
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854
pool 2:
task:kworker/0:4 state:R running task stack:0 pid:4754 tgid:4754 ppid:2 task_flags:0x4208060 flags:0x00000010
Workqueue: events nsim_fib_event_work
Call trace:
__switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:792 (T)
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x1368/0x2b50 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x13c/0x20c kernel/sched/core.c:7474
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_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+0x57a0/0x60c4 drivers/net/netdevsim/fib.c:889
nsim_fib_event_work+0x1d8/0x320 drivers/net/netdevsim/fib.c:1493
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3578
worker_thread+0x798/0xbd0 kernel/workqueue.c:3659
kthread+0x304/0x3d4 kernel/kthread.c:436
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854
net_ratelimit: 86641 callbacks suppressed
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:a6:a1:f8:01:63:4c, vlan:0)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0)
net_ratelimit: 87585 callbacks suppressed
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth1_to_bridge with own address as source address (addr:a6:a1:f8:01:63:4c, vlan:0)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0)
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2026-11-06 7:53 UTC | newest]
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2026-09-23 7:59 [syzbot] [wireless?] BUG: workqueue lockup in reg_todo syzbot
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