INFO: task kworker/0:5:6664 blocked for more than 149 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:5     state:D stack:21416 pid:6664  tgid:6664  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events switchdev_deferred_process_work
Call Trace:
 <TASK>
 __schedule+0x15dd/0x52d0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7fe/0x1300
 switchdev_deferred_process_work+0xe/0x20
 process_scheduled_works+0xb6e/0x18c0
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 ret_from_fork_asm+0x1a/0x30
 </TASK>
INFO: task syz.5.1276:9536 blocked for more than 153 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.1276      state:D stack:28160 pid:9536  tgid:9534  ppid:7212   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x15dd/0x52d0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7fe/0x1300
 __tun_chr_ioctl+0x3bc/0x1e10
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa5e639c799
RSP: 002b:00007fa5e7275028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fa5e6615fa0 RCX: 00007fa5e639c799
RDX: 0000200000000040 RSI: 00000000400454ca RDI: 0000000000000003
RBP: 00007fa5e6432c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa5e6616038 R14: 00007fa5e6615fa0 R15: 00007ffd5053d518
 </TASK>

Showing all locks held in the system:
2 locks held by kworker/0:0/9:
2 locks held by kworker/0:1/10:
2 locks held by kworker/u8:0/12:
3 locks held by kworker/1:1/32:
 #0: ffff888100069d48 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0xa52/0x18c0
 #1: ffffc90000a77c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0xa8d/0x18c0
 #2: ffffffff8fbcdbc8 (rtnl_mutex){+.+.}-{4:4}, at: reg_check_chans_work+0xa5/0xfe0
1 lock held by khungtaskd/35:
 #0: ffffffff8e75e520 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
3 locks held by kworker/u10:2/41:
10 locks held by kworker/0:1H/109:
3 locks held by kworker/u10:4/1093:
3 locks held by kworker/u10:5/1094:
3 locks held by kworker/u10:7/1098:
3 locks held by kworker/u10:8/1107:
1 lock held by jbd2/sda1-8/5218:
2 locks held by syslogd/5238:
2 locks held by udevd/5256:
5 locks held by kworker/1:3/5274:
5 locks held by dhcpcd/5553:
2 locks held by getty/5631:
 #0: ffff8881780150a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900031f82f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
1 lock held by sshd/5731:
4 locks held by syz-executor/5733:
3 locks held by syz-executor/5813:
1 lock held by udevd/5816:
 #0: ffff888103756358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xe0/0xd30
3 locks held by kworker/u8:3/5838:
 #0: ffff88816f0e8148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0xa52/0x18c0
 #1: ffffc900067f7c40 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa8d/0x18c0
 #2: ffffffff8fbcdbc8 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30
6 locks held by kworker/0:3/5839:
1 lock held by kworker/0:4/5859:
3 locks held by kworker/0:5/6664:
 #0: ffff88810006b148 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa52/0x18c0
 #1: ffffc90004ec7c40 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0xa8d/0x18c0
 #2: ffffffff8fbcdbc8 (rtnl_mutex){+.+.}-{4:4}, at: switchdev_deferred_process_work+0xe/0x20
1 lock held by syz.1.992/8741:
3 locks held by kworker/u9:6/9179:
3 locks held by kworker/u9:7/9181:
2 locks held by kworker/u9:8/9184:
1 lock held by syz.5.1276/9536:
 #0: ffffffff8fbcdbc8 (rtnl_mutex){+.+.}-{4:4}, at: __tun_chr_ioctl+0x3bc/0x1e10
1 lock held by syz.5.1276/9537:
1 lock held by syz.5.1276/9540:
 #0: ffffffff8fbcdbc8 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x722/0xbe0
2 locks held by kworker/0:7/9547:
5 locks held by syz-executor/9548:
2 locks held by syz-executor/9550:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 35 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+0xfd9/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 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: 109 Comm: kworker/0:1H 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: kblockd blk_mq_timeout_work
RIP: 0010:__lock_acquire+0x83d/0x2cf0
Code: 49 03 eb c3 89 e8 25 ff 1f 00 00 c1 ed 03 81 e5 00 60 00 00 09 c5 48 89 d8 48 c1 e8 20 29 c5 89 c1 c1 c1 04 31 e9 01 d8 29 cb <89> ca c1 c2 06 31 da 01 c1 29 d0 89 d6 c1 c6 08 31 c6 01 ca 29 f1
RSP: 0018:ffffc90000006d48 EFLAGS: 00000097
RAX: 0000000036198be1 RBX: 00000000e635e64e RCX: 000000005ae1a695
RDX: 0000000000000008 RSI: ffff888105aee458 RDI: ffff888105aed7c0
RBP: 000000000afe497a R08: ffffffff8a847b94 R09: ffff888175363958
R10: ffffc90000007060 R11: fffff52000000e10 R12: ffff888105aee458
R13: ffff888105aee458 R14: ffff888105aed7c0 R15: 0000000000000008
FS:  0000000000000000(0000) GS:ffff88818de60000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efceafc9b60 CR3: 000000000e54c000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 lock_acquire+0xf0/0x2e0
 _raw_read_lock_bh+0x3e/0x50
 ebt_do_table+0xe4/0x2830
 nf_hook_slow+0xc5/0x220
 NF_HOOK+0x23e/0x3f0
 __br_forward+0x397/0x540
 br_flood+0x6ee/0xb80
 br_handle_frame_finish+0x14c2/0x1bb0
 br_nf_hook_thresh+0x3dd/0x4c0
 br_nf_pre_routing_finish_ipv6+0xa3a/0xd70
 br_nf_pre_routing_ipv6+0x374/0x6f0
 br_handle_frame+0x1277/0x1510
 __netif_receive_skb_core+0x98f/0x31a0
 process_backlog+0x76d/0x1950
 __napi_poll+0xae/0x340
 net_rx_action+0x627/0xf70
 handle_softirqs+0x22a/0x870
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:console_flush_all+0x801/0xb20
Code: ff ff e8 a2 f0 20 00 90 0f 0b 90 e9 85 fc ff ff e8 94 f0 20 00 e8 3f a2 09 0a 48 85 db 74 c0 e8 85 f0 20 00 fb 48 8b 5c 24 08 <48> 8b 44 24 20 42 80 3c 20 00 4c 8b 74 24 18 74 08 4c 89 f7 e8 f6
RSP: 0018:ffffc900029cef40 EFLAGS: 00000293
RAX: ffffffff81a4b05b RBX: ffffc900029cf0a0 RCX: ffff888105aed7c0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900029cf050 R08: ffffffff90119cb7 R09: 1ffffffff2023396
R10: dffffc0000000000 R11: fffffbfff2023397 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff8f00abe0
 console_unlock+0xd1/0x1c0
 vprintk_emit+0x485/0x560
 dev_vprintk_emit+0x355/0x420
 dev_printk_emit+0xee/0x140
 _dev_info+0x11e/0x180
 nbd_xmit_timeout+0x928/0xc70
 blk_mq_handle_expired+0x172/0x2c0
 bt_iter+0x2c9/0x390
 sbitmap_for_each_set+0x30e/0x5f0
 blk_mq_queue_tag_busy_iter+0x74b/0xbf0
 blk_mq_timeout_work+0x1bd/0x3f0
 process_scheduled_works+0xb6e/0x18c0
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 ret_from_fork_asm+0x1a/0x30
 </TASK>
net_ratelimit: 33418 callbacks suppressed
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:f3:f2:ef:35:7d, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:f3:f2:ef:35:7d, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on veth0_to_bridge with own address as source address (addr:32:f3:f2:ef:35:7d, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0)
bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)
