INFO: task kworker/0:0:9 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:0     state:D stack:25368 pid:9     tgid:9     ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events switchdev_deferred_process_work
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7f7/0x1550
 switchdev_deferred_process_work+0xe/0x20
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
INFO: task kworker/u9:3:2273 blocked for more than 145 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u9:3    state:D stack:25104 pid:2273  tgid:2273  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_unbound linkwatch_event
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7f7/0x1550
 linkwatch_event+0xe/0x60
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
INFO: task dhcpcd:5358 blocked for more than 145 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:dhcpcd          state:D stack:20376 pid:5358  tgid:5358  ppid:5357   task_flags:0x400140 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7f7/0x1550
 rtnl_dumpit+0x92/0x200
 netlink_dump+0x702/0xe10
 netlink_recvmsg+0x690/0xa50
 sock_recvmsg+0x172/0x1b0
 ____sys_recvmsg+0x1e6/0x4a0
 ___sys_recvmsg+0x215/0x590
 __x64_sys_recvmsg+0x1ba/0x2a0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f828488a91e
RSP: 002b:00007fff7b37a2c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007fff7b37b3f0 RCX: 00007f828488a91e
RDX: 0000000000000000 RSI: 00007fff7b37b310 RDI: 0000000000000018
RBP: 00007fff7b37b380 R08: 0000000000000000 R09: 0000000000020000
R10: 00000000000000d8 R11: 0000000000000246 R12: 0000000000000c6c
R13: 00007fff7b37b2f4 R14: 00007fff7b37b310 R15: 00007fff7b37b300
 </TASK>
INFO: task kworker/1:6:5722 blocked for more than 148 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:6     state:D stack:24216 pid:5722  tgid:5722  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events netdev_rx_mode_work
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7f7/0x1550
 netdev_rx_mode_work+0x3ab/0x3c0
 </TASK>

Showing all locks held in the system:
4 locks held by kworker/u8:1/13:
 #0: ffff8881012b5940 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc90000127c40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffffffff8fdbfc88 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf4/0x800
 #3: ffffffff8e963068 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770
1 lock held by khungtaskd/35:
 #0: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by dhcpcd/5358:
 #0: ffff8881145516e8 (nlk_cb_mutex-ROUTE){+.+.}-{4:4}, at: netlink_dump+0xe2/0xe10
 #1: ffffffff8fdce940 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dumpit+0x92/0x200
2 locks held by getty/5439:
 #0: ffff88810f8d00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000346b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
2 locks held by kworker/u8:3/5670:
4 locks held by kworker/u11:3/7899:
 #0: ffff888113cdc940 ((wq_completion)hci4){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc90006397c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffff888118800ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d3/0x400
 #3: ffff8881188000b8 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0xa6f/0x1190
1 lock held by syz-executor/7908:
 #0: ffffffff8fdbfc88 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x4f7/0x730
2 locks held by syz-executor/7917:
 #0: ffffffff8fdbfc88 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x4f7/0x730
 #1: ffffffff8fdce940 (rtnl_mutex){+.+.}-{4:4}, at: ops_undo_list+0x2a4/0x940
1 lock held by syz-executor/7948:
 #0: ffffffff8e963068 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 35 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
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+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 9 Comm: kworker/0:0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events e1000_watchdog
RIP: 0010:rcu_is_watching+0x6f/0xb0
Code: c7 c3 d8 09 3a 93 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 75 34 8b 03 65 ff 0d 19 09 8e 11 74 11 83 e0 04 c1 e8 02 <5b> 41 5e 41 5f c3 cc cc cc cc cc e8 41 d4 88 ff eb e8 48 c7 c7 c0
RSP: 0018:ffffc900000068c8 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffff8881210339d8 RCX: 0000000080000102
RDX: ffff888102acd880 RSI: ffffffff8c28aa40 RDI: ffffffff8c28aa00
RBP: 0000000000000001 R08: ffffc900000069cf R09: 0000000000000000
R10: ffffc900000069c0 R11: fffff52000000d3a R12: dffffc0000000000
R13: ffffc900000069a0 R14: ffffffff8e262790 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff88818dc93000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1359aa4ae0 CR3: 000000000e74a000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 rcu_read_lock_held+0x15/0x50
 fib6_node_lookup_1+0x15b/0x8a0
 fib6_node_lookup+0xe4/0x1d0
 fib6_table_lookup+0xbc/0xa80
 ip6_pol_route+0x228/0x13d0
 fib6_rule_action+0x265/0xc00
 fib_rules_lookup+0x768/0xea0
 fib6_rule_lookup+0x1a0/0x730
 ip6_route_output_flags+0x364/0x5d0
 __nf_ip6_route+0x42/0xd0
 synproxy_send_tcp_ipv6+0x275/0x6d0
 synproxy_send_client_synack_ipv6+0x814/0xcb0
 nft_synproxy_eval_v6+0x34a/0x4e0
 nft_synproxy_do_eval+0x3ce/0x580
 nft_do_chain+0x467/0x19f0
 nft_do_chain_inet+0x360/0x4b0
 nf_hook_slow+0xc5/0x220
 NF_HOOK+0x21f/0x3c0
 ip6_input+0x16a/0x270
 NF_HOOK+0x336/0x3c0
 process_backlog+0x7dd/0x1950
 __napi_poll+0xae/0x340
 net_rx_action+0x627/0xf70
 handle_softirqs+0x22a/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80
Code: f7 e8 1d e5 f7 f5 f7 c3 00 02 00 00 74 05 e8 f0 6f 23 f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 64 67 e9 f5 65 8b 05 ed 70 8e 07 85 c0 74 18 5b 41 5e e9 51 48
RSP: 0018:ffffc900000e7868 EFLAGS: 00000206
RAX: 0000000000000002 RBX: 0000000000000246 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8dfa3a46 RDI: 0000000000000001
RBP: ffffc900000e79d0 R08: ffffffff903096f7 R09: 1ffffffff20612de
R10: dffffc0000000000 R11: fffffbfff20612df R12: dffffc0000000000
R13: 1ffff9200001cf28 R14: ffff88816d8c5060 R15: 0000000000000000
 e1000_update_stats+0x18bd/0x1b10
 e1000_watchdog+0x8d0/0x1420
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
