* [syzbot] [netfilter?] BUG: workqueue lockup in batadv_tt_purge
@ 2026-09-15 15:10 syzbot
2026-10-17 10:43 ` [syzbot] [arm?] " syzbot
0 siblings, 1 reply; 2+ messages in thread
From: syzbot @ 2026-09-15 15:10 UTC (permalink / raw)
To: davem, edumazet, fw, herbert, horms, kuba, linux-kernel, netdev,
netfilter-devel, pabeni, pablo, steffen.klassert, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: 5445d6419962 arm64: Don't read GMID_EL1 when MTE is disabled
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=1514428e580000
kernel config: https://syzkaller.appspot.com/x/.config?x=56ed23170c168d4c
dashboard link: https://syzkaller.appspot.com/bug?extid=61b202fdc410840f0198
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/e8b70e3bd109/disk-5445d641.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/e5227e56ac93/vmlinux-5445d641.xz
kernel image: https://storage.googleapis.com/syzbot-assets/54905f78be59/Image-5445d641.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+61b202fdc410840f0198@syzkaller.appspotmail.com
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 37s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x100
pwq 2: cpus=0 node=0 flags=0x0 nice=0 active=8 refcnt=9
in-flight: 6264:reg_todo for 27s
pending: 6*nsim_dev_hwstats_traffic_work, psi_avgs_work
pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=11 refcnt=12
pending: 4*nsim_dev_hwstats_traffic_work, 2*psi_avgs_work, 2*ovs_dp_masks_rebalance, free_obj_work, 2*psi_avgs_work
workqueue events_unbound: flags=0x2
pwq 8: cpus=0-1 flags=0x6 nice=0 active=20 refcnt=21
in-flight: 56:cfg80211_wiphy_work for 64s cfg80211_wiphy_work ,4950:cfg80211_wiphy_work for 68s cfg80211_wiphy_work ,7165:nsim_dev_trap_report_work for 9s ,12:cfg80211_wiphy_work for 69s cfg80211_wiphy_work ,1457:cfg80211_wiphy_work for 63s cfg80211_wiphy_work
pending: nsim_dev_trap_report_work, toggle_allocation_gate, 5*nsim_dev_trap_report_work, flush_memcg_stats_dwork, 3*nsim_dev_trap_report_work
pwq 8: cpus=0-1 flags=0x6 nice=0 active=8 refcnt=9
in-flight: 52:cfg80211_wiphy_work for 67s cfg80211_wiphy_work ,13:cfg80211_wiphy_work for 67s cfg80211_wiphy_work ,40:cfg80211_wiphy_work for 62s cfg80211_wiphy_work ,264:cfg80211_wiphy_work for 34s cfg80211_wiphy_work
workqueue events_power_efficient: flags=0x82
pwq 8: cpus=0-1 flags=0x6 nice=0 active=8 refcnt=9
in-flight: 1188:neigh_periodic_work for 41s ,7164:gc_worker for 2s
pending: crda_timeout_work, neigh_periodic_work, wg_ratelimiter_gc_entries, reg_check_chans_work, 2*neigh_managed_work
workqueue events_dfl_long: flags=0x2
pwq 8: cpus=0-1 flags=0x6 nice=0 active=6 refcnt=7
pending: 6*defense_work_handler
workqueue mm_percpu_wq: flags=0x108
pwq 6: cpus=1 node=0 flags=0x0 nice=0 active=1 refcnt=2
pending: vmstat_update
workqueue bat_events: flags=0x6000a
pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=45 MAYDAY
in-flight: 2852(RESCUER):batadv_tt_purge for 11s
pending: mayday_cursor_func
inactive: 2*batadv_tt_purge, batadv_dat_purge, 2*batadv_bla_periodic_work, batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, batadv_bla_periodic_work, batadv_dat_purge, 4*batadv_mcast_mla_update, 2*batadv_iv_send_outstanding_bat_ogm_packet, 2*batadv_purge_orig, 6*batadv_iv_send_outstanding_bat_ogm_packet, 2*batadv_purge_orig, batadv_dat_purge, batadv_bla_periodic_work, 4*batadv_iv_send_outstanding_bat_ogm_packet, batadv_purge_orig, batadv_tt_purge, batadv_mcast_mla_update, 3*batadv_iv_send_outstanding_bat_ogm_packet, batadv_tt_purge
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=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=0x6
pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2
pending: wg_packet_handshake_send_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_tx_worker, wg_packet_decrypt_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=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-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=0x6
pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2
pending: wg_packet_handshake_send_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_tx_worker, wg_packet_decrypt_worker
workqueue wg-crypt-wg2: 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-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=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-wg1: flags=0x128
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-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=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
pending: wg_packet_handshake_send_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=0x6
pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2
pending: wg_packet_handshake_send_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
pool 2: cpus=0 node=0 flags=0x0 nice=0 hung=0s workers=10 idle: 4833 9 4790 6306 5581 4834 6772 10 1009
pool 8: cpus=0-1 flags=0x6 nice=0 hung=2s workers=12 manager: 7166
Showing backtraces of busy workers in stalled worker pools:
pool 6: no worker in running state, cpu=1 is busy (nr_workers=11 nr_idle=11)
The pool might have trouble waking an idle worker.
Backtrace of last woken worker:
task:kworker/1:1 state:R running task stack:0 pid:26 tgid:26 ppid:2 task_flags:0x4208060 flags:0x00000010
Workqueue: 0x0 (wg-crypt-wg0)
Call trace:
__switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:775 (T)
context_switch kernel/sched/core.c:5520 [inline]
__schedule+0x1370/0x2d80 kernel/sched/core.c:7270
__schedule_loop kernel/sched/core.c:7347 [inline]
schedule+0x13c/0x20c kernel/sched/core.c:7362
worker_thread+0x924/0xbd0 kernel/workqueue.c:3566
kthread+0x304/0x3d4 kernel/kthread.c:436
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 2852 Comm: kworker/R-bat_e Not tainted syzkaller #0 PREEMPT
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026
Workqueue: bat_events batadv_tt_purge
pstate: 03400005 (nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : in_softirq_really kernel/kcov.c:167 [inline]
pc : check_kcov_mode+0x18/0x54 kernel/kcov.c:179
lr : write_comp_data+0x38/0x84 kernel/kcov.c:242
sp : ffff80008ec46dd0
x29: ffff80008ec46dd0 x28: dfff800000000000 x27: 000000000000224e
x26: dfff800000000000 x25: ffff700011d88dc8 x24: 1ffff00011d88dfa
x23: ffff0000c8e9d880 x22: 0000000000000007 x21: 0000000000000002
x20: ffff000023a0f400 x19: ffff800085709eb4 x18: 0000000011264820
x17: 0000000001320140 x16: 0140000800000000 x15: 0000000000000000
x14: 00000000850ade10 x13: 0000000000000007 x12: 0000000000000000
x11: 0000000000000000 x10: 000000000000000f x9 : 0000000000000101
x8 : ffff0000c8e9d880 x7 : 0000000000000000 x6 : 000000000000003f
x5 : 0000000000000040 x4 : 0000000000000000 x3 : ffff800085709eb4
x2 : ffff000023a0f400 x1 : ffff0000c8e9d880 x0 : 0000000000000003
Call trace:
preempt_count arch/arm64/include/asm/preempt.h:12 [inline] (P)
in_softirq_really kernel/kcov.c:167 [inline] (P)
check_kcov_mode+0x18/0x54 kernel/kcov.c:179 (P)
__sanitizer_cov_trace_const_cmp8+0x24/0x30 kernel/kcov.c:317
__xfrm_decode_session+0x484/0x8a8 net/xfrm/xfrm_policy.c:3524
xfrm_decode_session include/net/xfrm.h:1357 [inline]
ip_route_me_harder+0x7c4/0xd80 net/ipv4/netfilter.c:67
synproxy_send_tcp+0x2d4/0x5a4 net/netfilter/nf_synproxy_core.c:434
synproxy_send_client_synack+0x3b0/0x640 net/netfilter/nf_synproxy_core.c:487
nft_synproxy_eval_v4+0x16c/0x278 net/netfilter/nft_synproxy.c:59
nft_synproxy_do_eval+0x2d8/0x4a4 net/netfilter/nft_synproxy.c:141
nft_synproxy_eval+0x34/0x48 net/netfilter/nft_synproxy.c:247
expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
nft_do_chain+0x418/0x13c8 net/netfilter/nf_tables_core.c:285
nft_do_chain_inet+0x284/0x3d4 net/netfilter/nft_chain_filter.c:162
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc8/0x224 net/netfilter/core.c:619
nf_hook include/linux/netfilter.h:280 [inline]
NF_HOOK+0x1f0/0x398 include/linux/netfilter.h:323
ip_local_deliver+0x128/0x188 net/ipv4/ip_input.c:262
dst_input include/net/dst.h:480 [inline]
ip_rcv_finish+0x20c/0x230 net/ipv4/ip_input.c:492
NF_HOOK+0x308/0x398 include/linux/netfilter.h:325
ip_rcv+0x7c/0x9c net/ipv4/ip_input.c:612
__netif_receive_skb_one_core+0xc8/0x110 net/core/dev.c:6264
__netif_receive_skb+0x34/0x128 net/core/dev.c:6377
process_backlog+0x5f4/0x16f8 net/core/dev.c:6728
__napi_poll+0xb4/0x328 net/core/dev.c:7787
napi_poll net/core/dev.c:7850 [inline]
net_rx_action+0x5b0/0xc14 net/core/dev.c:8007
handle_softirqs+0x2ec/0xd98 kernel/softirq.c:645
__do_softirq+0x14/0x20 kernel/softirq.c:679
____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:78
call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:885
do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:83
do_softirq+0x90/0xf8 kernel/softirq.c:546
__local_bh_enable_ip+0x240/0x35c kernel/softirq.c:473
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:237 [inline]
_raw_spin_unlock_bh+0x3c/0x4c kernel/locking/spinlock.c:245
spin_unlock_bh include/linux/spinlock.h:407 [inline]
batadv_tt_global_purge net/batman-adv/translation-table.c:2390 [inline]
batadv_tt_purge+0x3e4/0x7b4 net/batman-adv/translation-table.c:3754
process_one_work kernel/workqueue.c:3387 [inline]
process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3470
rescuer_thread+0x68c/0xd90 kernel/workqueue.c:3694
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] [arm?] BUG: workqueue lockup in batadv_tt_purge
2026-09-15 15:10 [syzbot] [netfilter?] BUG: workqueue lockup in batadv_tt_purge syzbot
@ 2026-10-17 10:43 ` syzbot
0 siblings, 0 replies; 2+ messages in thread
From: syzbot @ 2026-10-17 10:43 UTC (permalink / raw)
To: davem, dsahern, edumazet, edumazet, fw, herbert, horms, idosch,
kuba, linux-arm-kernel, linux-kernel, netdev, netfilter-devel,
pabeni, pablo, steffen.klassert, syzkaller-bugs
syzbot has found a reproducer for the following issue on:
HEAD commit: 7a19f0cc94ad Merge branch 'for-next/core' 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=16fb34e1580000
kernel config: https://syzkaller.appspot.com/x/.config?x=26d6221a572842ac
dashboard link: https://syzkaller.appspot.com/bug?extid=61b202fdc410840f0198
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=11329bd1580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/296cd4b77dbf/disk-7a19f0cc.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/e57669ed895f/vmlinux-7a19f0cc.xz
kernel image: https://storage.googleapis.com/syzbot-assets/c679c1ad76d4/Image-7a19f0cc.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+61b202fdc410840f0198@syzkaller.appspotmail.com
bridge0: received packet on bridge_slave_1 with own address as source address (addr:aa:aa:aa:aa:aa:1c, vlan:0)
BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=-20 stuck for 32s!
Showing busy workqueues and worker pools:
workqueue events: flags=0x100
pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=9 refcnt=10
pending: free_ipc, rht_deferred_worker, 2*nsim_dev_hwstats_traffic_work, vmstat_shepherd, 2*psi_avgs_work, 2*ovs_dp_masks_rebalance
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=11 refcnt=12
in-flight: 1503:request_firmware_work_func for 147s
pending: 3*nsim_dev_hwstats_traffic_work, 2*psi_avgs_work, drm_fb_helper_damage_work, 4*ovs_dp_masks_rebalance
workqueue events_unbound: flags=0x2
pwq 8: cpus=0-1 flags=0x6 nice=0 active=9 refcnt=10
in-flight: 5092:call_usermodehelper_exec_work for 84s ,13:nsim_dev_trap_report_work for 17s ,5097:nsim_dev_trap_report_work for 5s ,196:cfg80211_wiphy_work for 25s
pending: 2*nsim_dev_trap_report_work, flush_memcg_stats_dwork, toggle_allocation_gate, nsim_dev_trap_report_work
pwq 8: cpus=0-1 flags=0x6 nice=0 active=13 refcnt=14
in-flight: 5096:cfg80211_wiphy_work for 85s cfg80211_wiphy_work ,5095:cfg80211_wiphy_work for 90s cfg80211_wiphy_work ,49:cfg80211_wiphy_work for 93s cfg80211_wiphy_work ,61:cfg80211_wiphy_work for 94s cfg80211_wiphy_work ,12:linkwatch_event for 93s ,1428:cfg80211_wiphy_work for 93s cfg80211_wiphy_work ,1214:cfg80211_wiphy_work for 91s cfg80211_wiphy_work
workqueue events_power_efficient: flags=0x82
pwq 8: cpus=0-1 flags=0x6 nice=0 active=6 refcnt=7
in-flight: 1187:neigh_periodic_work for 2s
pending: 2*neigh_managed_work, fb_flashcursor, gc_worker, wg_ratelimiter_gc_entries
workqueue events_dfl_long: flags=0x2
pwq 8: cpus=0-1 flags=0x6 nice=0 active=6 refcnt=7
pending: 6*defense_work_handler
workqueue rcu_gp: flags=0x108
pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=4 MAYDAY
pending: process_srcu
workqueue mm_percpu_wq: flags=0x108
pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=3 MAYDAY
pending: vmstat_update
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=1 refcnt=4 MAYDAY
pending: mayday_cursor_func, vmstat_update
workqueue writeback: flags=0x4a
pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=3 MAYDAY
pending: wb_workfn
workqueue kblockd: flags=0x118
pwq 7: cpus=1 node=0 flags=0x0 nice=-20 active=1 refcnt=2
pending: blk_mq_timeout_work
workqueue mld: flags=0x40108
pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=4 MAYDAY
pending: mld_ifc_work
inactive: mld_ifc_work
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=1 refcnt=97 MAYDAY
in-flight: 2824(RESCUER):mld_ifc_work for 2s
pending: mayday_cursor_func
inactive: 3*mld_ifc_work, mld_dad_work, 5*mld_ifc_work, mld_dad_work, 5*mld_ifc_work, mld_dad_work, 2*mld_ifc_work, mld_dad_work, 5*mld_ifc_work, mld_dad_work, 10*mld_ifc_work, mld_dad_work, 3*mld_ifc_work, mld_dad_work, 4*mld_ifc_work, 3*mld_dad_work, mld_ifc_work, mld_dad_work, 6*mld_ifc_work, mld_dad_work, 5*mld_ifc_work, mld_dad_work, 11*mld_ifc_work, mld_dad_work, 4*mld_ifc_work, mld_dad_work, 5*mld_ifc_work, 2*mld_dad_work, 4*mld_ifc_work, 2*mld_dad_work, mld_ifc_work
workqueue ipv6_addrconf: flags=0x6000a
pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=386
in-flight: 40:addrconf_dad_work for 94s
inactive: 382*addrconf_dad_work
workqueue bat_events: flags=0x6000a
pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=40 MAYDAY
in-flight: 2857(RESCUER):batadv_tt_purge for 0s
pending: mayday_cursor_func
inactive: 3*batadv_iv_send_outstanding_bat_ogm_packet, 2*batadv_purge_orig, 2*batadv_iv_send_outstanding_bat_ogm_packet, batadv_purge_orig, 6*batadv_iv_send_outstanding_bat_ogm_packet, 3*batadv_mcast_mla_update, 2*batadv_dat_purge, 2*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 wg-kex-wg0: flags=0x124
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=1 refcnt=2
in-flight: 4784:wg_packet_handshake_receive_worker for 47s
workqueue wg-crypt-wg0: flags=0x128
pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=3 MAYDAY
pending: wg_packet_encrypt_worker
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=2 refcnt=5 MAYDAY
pending: wg_packet_tx_worker, wg_packet_encrypt_worker
workqueue wg-crypt-wg1: flags=0x128
pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=3 MAYDAY
pending: wg_packet_decrypt_worker
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=2 refcnt=5 MAYDAY
pending: mayday_cursor_func, wg_packet_decrypt_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
in-flight: 5067:wg_packet_handshake_receive_worker for 30s
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=1 refcnt=2
in-flight: 5074:wg_packet_handshake_receive_worker for 41s
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=0x128
pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=2 refcnt=4 MAYDAY
pending: wg_packet_encrypt_worker, wg_packet_tx_worker
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=3 refcnt=6 MAYDAY
pending: wg_packet_tx_worker, wg_packet_encrypt_worker, wg_packet_decrypt_worker
workqueue wg-kex-wg0: flags=0x124
pwq 6: cpus=1 node=0 flags=0x2 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=0x128
pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=2 refcnt=4 MAYDAY
pending: wg_packet_tx_worker, wg_packet_encrypt_worker
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=3 refcnt=6 MAYDAY
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=0x2 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=0x2 nice=0 active=2 refcnt=4 MAYDAY
pending: wg_packet_tx_worker, wg_packet_encrypt_worker
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=3 refcnt=6 MAYDAY
pending: mayday_cursor_func, 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=2 refcnt=3
in-flight: 866:wg_packet_handshake_receive_worker for 31s
pending: wg_packet_handshake_receive_worker
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=2 refcnt=3
in-flight: 24:wg_packet_handshake_receive_worker for 44s
pending: wg_packet_handshake_receive_worker
workqueue wg-kex-wg0: flags=0x124
pwq 6: cpus=1 node=0 flags=0x2 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=0x128
pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=3 MAYDAY
pending: wg_packet_tx_worker
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=3 refcnt=6 MAYDAY
pending: wg_packet_decrypt_worker, 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=2 refcnt=3
in-flight: 4794:wg_packet_handshake_receive_worker for 67s wg_packet_handshake_receive_worker
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=2 refcnt=3
in-flight: 4833:wg_packet_handshake_receive_worker for 47s
pending: wg_packet_handshake_receive_worker
workqueue wg-kex-wg1: flags=0x6
pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2
pending: wg_packet_handshake_send_worker
workqueue wg-crypt-wg1: flags=0x128
pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=2 refcnt=4 MAYDAY
pending: wg_packet_decrypt_worker, wg_packet_tx_worker
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=3 refcnt=6 MAYDAY
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=0x2 nice=0 active=2 refcnt=3
in-flight: 5091:wg_packet_handshake_receive_worker for 22s
pending: wg_packet_handshake_receive_worker
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=2 refcnt=3
in-flight: 4847:wg_packet_handshake_receive_worker for 41s
pending: wg_packet_handshake_receive_worker
workqueue wg-crypt-wg2: flags=0x128
pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=2 refcnt=5 MAYDAY
in-flight: 10:wg_packet_decrypt_worker for 1s
pending: wg_packet_encrypt_worker
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=2 refcnt=4 MAYDAY
pending: wg_packet_decrypt_worker, 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: 4955:wg_packet_handshake_receive_worker for 5s
pwq 6: cpus=1 node=0 flags=0x2 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=0x2 nice=0 active=1 refcnt=3 MAYDAY
pending: wg_packet_encrypt_worker
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=3 refcnt=6 MAYDAY
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=0x2 nice=0 active=1 refcnt=2
pending: wg_packet_handshake_receive_worker
workqueue wg-kex-wg1: flags=0x6
pwq 8: cpus=0-1 flags=0x6 nice=0 active=1 refcnt=2
pending: wg_packet_handshake_send_worker
workqueue wg-crypt-wg1: flags=0x128
pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=3 refcnt=5 MAYDAY
pending: wg_packet_decrypt_worker, wg_packet_tx_worker, wg_packet_encrypt_worker
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=3 refcnt=6 MAYDAY
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=0x2 nice=0 active=2 refcnt=3
in-flight: 9:wg_packet_handshake_receive_worker for 31s wg_packet_handshake_receive_worker
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=2 refcnt=3
in-flight: 26:wg_packet_handshake_receive_worker for 47s
pending: 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=0x128
pwq 2: cpus=0 node=0 flags=0x2 nice=0 active=1 refcnt=4 MAYDAY
pending: wg_packet_decrypt_worker
pwq 6: cpus=1 node=0 flags=0x2 nice=0 active=2 refcnt=4 MAYDAY
pending: wg_packet_decrypt_worker, wg_packet_encrypt_worker
pool 2: cpus=0 node=0 flags=0x2 nice=0 hung=1s workers=8 manager: 5019
pool 6: cpus=1 node=0 flags=0x2 nice=0 hung=2s workers=8 manager: 1091
pool 8: cpus=0-1 flags=0x6 nice=0 hung=0s workers=14 manager: 5099
Showing backtraces of busy workers in stalled worker pools:
pool 7: no worker in running state, cpu=1 is busy (nr_workers=2 nr_idle=2)
The pool might have trouble waking an idle worker.
Backtrace of last woken worker:
task:kworker/1:1H state:R running task stack:0 pid:4356 tgid:4356 ppid:2 task_flags:0x4208060 flags:0x00000010
Workqueue: 0x0 (kblockd)
Call trace:
__switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:775 (T)
context_switch kernel/sched/core.c:5533 [inline]
__schedule+0x135c/0x2b00 kernel/sched/core.c:7284
__schedule_loop kernel/sched/core.c:7361 [inline]
schedule+0x13c/0x20c kernel/sched/core.c:7376
worker_thread+0x924/0xbd0 kernel/workqueue.c:3575
kthread+0x304/0x3d4 kernel/kthread.c:436
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 2857 Comm: kworker/R-bat_e Not tainted syzkaller #0 PREEMPT
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026
Workqueue: bat_events batadv_tt_purge
pstate: 43400005 (nZcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : check_kcov_mode+0x30/0x54 kernel/kcov.c:179
lr : __sanitizer_cov_trace_pc+0x28/0x5c kernel/kcov.c:213
sp : ffff80008f7f6480
x29: ffff80008f7f6480 x28: ffff0000d7c37cdf x27: dfff800000000000
x26: 1fffe0001af86f99 x25: 0000000000000000 x24: 0000000000000001
x23: 0000000000000003 x22: ffff0000d7c37cc8 x21: 00000000fffffffd
x20: ffff0000c989bb00 x19: ffff800085770458 x18: ffff80011b89c000
x17: 0000000000020010 x16: 0038dd8600000000 x15: 0000000000000001
x14: 000000000453af90 x13: 0000000000000002 x12: 0000000000000000
x11: ffff80008f7f6740 x10: 000000000000003f x9 : 0000000000000101
x8 : 0000000000000000 x7 : ffff80008f7f6750 x6 : 0000000000000003
x5 : ffff80008f7f6750 x4 : ffff80008f7f6740 x3 : ffff800085770444
x2 : 00000000fffffffd x1 : ffff0000c989bb00 x0 : 0000000000000002
Call trace:
check_kcov_mode+0x30/0x54 kernel/kcov.c:179 (P)
find_match+0x1b4/0xacc net/ipv6/route.c:790
__find_rr_leaf+0x1d8/0x634 net/ipv6/route.c:873
find_rr_leaf net/ipv6/route.c:894 [inline]
rt6_select net/ipv6/route.c:938 [inline]
fib6_table_lookup+0x3a4/0x8e8 net/ipv6/route.c:2261
ip6_pol_route+0x224/0xec4 net/ipv6/route.c:2298
ip6_pol_route_input+0x74/0x98 net/ipv6/route.c:2357
pol_lookup_func include/net/ip6_fib.h:670 [inline]
fib6_rule_lookup+0x1a0/0x474 net/ipv6/fib6_rules.c:123
ip6_route_input_lookup+0xa8/0xdc net/ipv6/route.c:2369
ip6_route_input+0x578/0x860 net/ipv6/route.c:2672
ip6_rcv_finish_core+0x200/0x3a4 net/ipv6/ip6_input.c:106
ip6_rcv_finish+0x120/0x204 net/ipv6/ip6_input.c:117
ip_sabotage_in+0x1bc/0x220 net/bridge/br_netfilter_hooks.c:988
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_slow+0xc8/0x224 net/netfilter/core.c:619
nf_hook include/linux/netfilter.h:280 [inline]
NF_HOOK+0x1f0/0x398 include/linux/netfilter.h:323
ipv6_rcv+0x9c/0xbc net/ipv6/ip6_input.c:351
__netif_receive_skb_one_core+0xc8/0x110 net/core/dev.c:6297
__netif_receive_skb+0x34/0x128 net/core/dev.c:6410
netif_receive_skb_internal net/core/dev.c:6496 [inline]
netif_receive_skb+0x1e0/0x888 net/core/dev.c:6555
br_netif_receive_skb+0x138/0x184 net/bridge/br_input.c:30
NF_HOOK+0xa8/0x3a0 include/linux/netfilter.h:325
br_pass_frame_up+0x28c/0x41c net/bridge/br_input.c:70
br_handle_frame_finish+0xed0/0x14c4 net/bridge/br_input.c:-1
br_nf_hook_thresh+0x344/0x3e8 net/bridge/br_netfilter_hooks.c:-1
br_nf_pre_routing_finish_ipv6+0x7ac/0xaa4 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:325 [inline]
br_nf_pre_routing_ipv6+0x2c4/0x5f8 net/bridge/br_netfilter_ipv6.c:183
br_nf_pre_routing+0x6e0/0x1168 net/bridge/br_netfilter_hooks.c:513
nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:291 [inline]
br_handle_frame+0xeb0/0x10dc net/bridge/br_input.c:451
__netif_receive_skb_core+0x848/0x2a3c net/core/dev.c:6184
__netif_receive_skb_one_core+0x70/0x110 net/core/dev.c:6295
__netif_receive_skb+0x34/0x128 net/core/dev.c:6410
process_backlog+0x588/0x14e0 net/core/dev.c:6761
__napi_poll+0xb4/0x328 net/core/dev.c:7830
napi_poll net/core/dev.c:7893 [inline]
net_rx_action+0x5b0/0xc14 net/core/dev.c:8050
handle_softirqs+0x324/0xcbc kernel/softirq.c:645
__do_softirq+0x14/0x20 kernel/softirq.c:679
____do_softirq+0x10/0x1c arch/arm64/kernel/irq.c:78
call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:901
do_softirq_own_stack+0x1c/0x28 arch/arm64/kernel/irq.c:83
do_softirq+0x90/0xf8 kernel/softirq.c:546
__local_bh_enable_ip+0x190/0x234 kernel/softirq.c:473
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:237 [inline]
_raw_spin_unlock_bh+0x3c/0x4c kernel/locking/spinlock.c:245
spin_unlock_bh include/linux/spinlock.h:407 [inline]
batadv_tt_local_purge+0x274/0x2f0 net/batman-adv/translation-table.c:1402
batadv_tt_purge+0x44/0x7b4 net/batman-adv/translation-table.c:3753
process_one_work kernel/workqueue.c:3396 [inline]
process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3479
rescuer_thread+0x68c/0xd90 kernel/workqueue.c:3703
kthread+0x304/0x3d4 kernel/kthread.c:436
ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:854
net_ratelimit: 106525 callbacks suppressed
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:1c, 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:1c, 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:1c, 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:1c, 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:1c, 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:[~2026-10-17 10:43 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz follow: Atom feed
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2026-09-15 15:10 [syzbot] [netfilter?] BUG: workqueue lockup in batadv_tt_purge syzbot
2026-10-17 10:43 ` [syzbot] [arm?] " syzbot
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