INFO: task kworker/1:2:799 blocked for more than 142 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:2     state:D stack:21848 pid:799   tgid:799   ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_power_efficient reg_check_chans_work
Call Trace:
 <TASK>
 __schedule+0x1821/0x5740
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7f7/0x1550
 reg_check_chans_work+0x197/0x1090
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xc21/0xfc0
 kthread+0x389/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>

Showing all locks held in the system:
1 lock held by kthreadd/2:
3 locks held by kworker/0:0/9:
 #0: ffff88810006b140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc900000e7c40 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffffffff90132660 (ovs_mutex){+.+.}-{4:4}, at: ovs_dp_masks_rebalance+0x2f/0xe0
4 locks held by kworker/0:1/10:
4 locks held by kworker/u8:0/12:
4 locks held by kworker/1:0/24:
 #0: ffff88816c8b9940 ((wq_completion)wg-kex-wg0#8){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc900001e7c40 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ((typeof((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))))((unsigned long)((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))) + (((__per_cpu_offset[(cpu)]))))); })->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffff8881752653c0 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x1a1/0x9a0
 #3: ffff88816ac83ea0 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x58b/0x9a0
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cce0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
4 locks held by kswapd0/90:
3 locks held by kworker/1:2/799:
 #0: ffff88810006b140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc900050efc40 ((work_completion)(&(&ovs_net->masks_rebalance)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffff88823c626118 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x1ae/0xf30
4 locks held by kworker/0:2/2232:
2 locks held by kworker/1:3/5029:
2 locks held by syslogd/5049:
4 locks held by udevd/5067:
2 locks held by dhcpcd/5362:
1 lock held by dhcpcd/5363:
2 locks held by getty/5446:
 #0: ffff88816dbd60a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034762e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
5 locks held by kworker/u8:2/5453:
 #0: ffff88812103aee0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x31/0x150
 #1: ffffc9000482fc40 ((work_completion)(&(&cp->cp_conn_w)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffff888114b75280 (&tc->t_conn_path_lock){+.+.}-{4:4}, at: rds_tcp_conn_path_connect+0x1cc/0x930
 #3: ffffffff8eaa0850 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x27/0x60
 #4: ffff88812103aee0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x31/0x150
3 locks held by syz-executor/5599:
4 locks held by kworker/1:5/5696:
 #0: ffff88811a5a0940 ((wq_completion)wg-kex-wg2#36){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc90005c47c40 ((work_completion)(&({ do { const void *__vpp_verify = (typeof((worker) + 0))((void *)0); (void)__vpp_verify; } while (0); ((typeof((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))))((unsigned long)((__typeof_unqual__(*((worker))) *)(( unsigned long)((worker)))) + (((__per_cpu_offset[(cpu)]))))); })->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffff88811af093c0 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x1a1/0x9a0
 #3: ffff88811270aad0 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_consume_initiation+0x58b/0x9a0
4 locks held by kworker/u8:4/6899:
4 locks held by kworker/u8:5/10707:
2 locks held by kworker/1:10/11083:
3 locks held by kworker/u9:15/19323:
2 locks held by syz-executor/20791:
4 locks held by kworker/u8:6/21440:
4 locks held by kworker/u8:7/22859:
6 locks held by kworker/u8:10/22862:
 #0: ffff8881012b5940 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc9000438fc40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffffffff8fdb9068 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf4/0x800
 #3: ffff88816d40b128 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x129/0x420
 #4: ffff88816d409258 (&devlink->lock_key#34){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x142/0x420
 #5: ffffffff8e962fe8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770
5 locks held by kworker/u8:3/30655:
3 locks held by syz-executor/3698:
3 locks held by syz-executor/5220:
4 locks held by kworker/u8:12/5221:
4 locks held by kworker/u8:13/5224:

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xfd3/0x1030
 kthread+0x389/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 11083 Comm: kworker/1:10 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events_power_efficient neigh_periodic_work
RIP: 0010:__this_cpu_preempt_check+0x0/0x20
Code: b9 28 8c e8 52 69 80 f5 e8 cd 98 8b f5 eb aa 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 89 fe 48 c7 c7 e0 b8 28 8c e9 fd fe ff ff cc cc cc
RSP: 0018:ffffc90000a07918 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 0000000080000102
RDX: ffff88816da05940 RSI: 00000000ffffffff RDI: ffffffff8dfbcae3
RBP: 00000000ffffffff R08: ffffc90000a07c80 R09: ffffc90000a07c90
R10: ffffc90000a07ae0 R11: fffff52000140f5e R12: 0000000000000246
R13: ffff88816da05940 R14: ffffffff8e95cce0 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8882a929f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555d1a3a68 CR3: 000000010fe40000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 lock_is_held_type+0x5a/0x150
 ip6_ignore_linkdown+0x66/0x140
 find_match+0x9c/0xb40
 __find_rr_leaf+0x248/0x760
 fib6_table_lookup+0x3b4/0xa80
 ip6_pol_route+0x228/0x13d0
 fib6_rule_action+0x9d7/0xc00
 fib_rules_lookup+0x768/0xea0
 fib6_rule_lookup+0x1a0/0x730
 ip6_route_input+0x730/0xad0
 ip6_rcv_finish+0x141/0x280
 NF_HOOK+0x336/0x3c0
 netif_receive_skb+0x278/0xbf0
 NF_HOOK+0xa4/0x3a0
 br_handle_frame_finish+0x1541/0x1c80
 br_handle_frame+0x80f/0x1510
 __netif_receive_skb_core+0x98f/0x3170
 process_backlog+0x76d/0x1950
 __napi_poll+0xae/0x340
 net_rx_action+0x627/0xf70
 handle_softirqs+0x22a/0x840
 do_softirq+0x76/0xd0
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x130
 neigh_periodic_work+0xc28/0xe50
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x389/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
