INFO: task kworker/u10:11:26382 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u10:11  state:D stack:23528 pid:26382 tgid:26382 ppid:2      task_flags:0x4208160 flags:0x00080000
Workqueue: events_unbound linkwatch_event
Call Trace:
 <TASK>
 __schedule+0x17d4/0x5630
 schedule+0x164/0x2b0
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7c1/0x1550
 linkwatch_event+0xe/0x60
 process_scheduled_works+0xa88/0x14c0
 worker_thread+0xa47/0xfb0
 kthread+0x38b/0x480
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
INFO: task kworker/0:2:8513 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:2     state:D stack:26016 pid:8513  tgid:8513  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events switchdev_deferred_process_work
Call Trace:
 <TASK>
 __schedule+0x17d4/0x5630
 schedule+0x164/0x2b0
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7c1/0x1550
 switchdev_deferred_process_work+0xe/0x20
 process_scheduled_works+0xa88/0x14c0
 worker_thread+0xa47/0xfb0
 kthread+0x38b/0x480
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
INFO: task kworker/1:0:8524 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:0     state:D stack:26016 pid:8524  tgid:8524  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events netdev_work_proc
Call Trace:
 <TASK>
 __schedule+0x17d4/0x5630
 schedule+0x164/0x2b0
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7c1/0x1550
 netdev_work_proc+0x6f/0x770
 process_scheduled_works+0xa88/0x14c0
 worker_thread+0xa47/0xfb0
 kthread+0x38b/0x480
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
INFO: task syz-executor:8621 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:25704 pid:8621  tgid:8621  ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17d4/0x5630
 schedule+0x164/0x2b0
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7c1/0x1550
 ib_get_eth_speed+0x173/0x7f0
 siw_query_port+0x3c/0x4a0
 ib_setup_port_attrs+0x294/0x2420
 add_one_compat_dev+0x446/0x650
 rdma_dev_init_net+0x243/0x2f0
 ops_init+0x35d/0x5d0
 setup_net+0x118/0x350
 copy_net_ns+0x4f9/0x720
 create_new_namespaces+0x3f0/0x6b0
 unshare_nsproxy_namespaces+0x149/0x190
 ksys_unshare+0x5a7/0x950
 __x64_sys_unshare+0x38/0x50
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc11ab9f3a7
RSP: 002b:00007ffffd1bddb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007fc11ae25f40 RCX: 00007fc11ab9f3a7
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00007fc11ae267b8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000008
R13: 0000000000000003 R14: 00007ffffd1bdff8 R15: 0000000000000000
 </TASK>
INFO: task syz.0.9521:8638 blocked for more than 145 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.9521      state:D stack:26504 pid:8638  tgid:8637  ppid:5598   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17d4/0x5630
 schedule+0x164/0x2b0
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7c1/0x1550
 ip_tunnel_init_net+0x2d5/0x820
 ops_init+0x35d/0x5d0
 setup_net+0x118/0x350
 copy_net_ns+0x4f9/0x720
 create_new_namespaces+0x3f0/0x6b0
 unshare_nsproxy_namespaces+0x149/0x190
 ksys_unshare+0x5a7/0x950
 __x64_sys_unshare+0x38/0x50
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff81459e0d9
RSP: 002b:00007ff815465028 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007ff814825fa0 RCX: 00007ff81459e0d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006a040000
RBP: 00007ff814635024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff814826038 R14: 00007ff814825fa0 R15: 00007ffffdd28028
 </TASK>

Showing all locks held in the system:
locks held by khungtaskd/34: 1, last CPU#1:
 #0: ffffffff8eb5a1e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
locks held by dhcpcd/5336: 1, on CPU#0:
 #0: ffffffff90035040 (rtnl_mutex){+.+.}-{4:4}, at: devinet_ioctl+0x2fb/0x1c50
locks held by getty/5418: 2, on CPU#0:
 #0: ffff88817166b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034762e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360
locks held by kworker/u10:11/26382: 3, on CPU#1:
 #0: ffff8881000ac140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xa1a/0x14c0
 #1: ffffc90027a0fc40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0xa1a/0x14c0
 #2: ffffffff90035040 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60
locks held by kworker/u8:15/7962: 4, last CPU#1:
 #0: ffff8881012d5940 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0xa1a/0x14c0
 #1: ffffc9002b06fc40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0xa1a/0x14c0
 #2: ffffffff900264a8 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf5/0x810
 #3: ffffffff90035040 (rtnl_mutex){+.+.}-{4:4}, at: ops_undo_list+0x28e/0x8d0
locks held by kworker/u8:27/8016: 3, on CPU#1:
 #0: ffff8881716f6940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0xa1a/0x14c0
 #1: ffffc9002b57fc40 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa1a/0x14c0
 #2: ffffffff90035040 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30
locks held by kworker/0:2/8513: 3, on CPU#0:
 #0: ffff88810006b140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa1a/0x14c0
 #1: ffffc9002c9b7c40 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0xa1a/0x14c0
 #2: ffffffff90035040 (rtnl_mutex){+.+.}-{4:4}, at: switchdev_deferred_process_work+0xe/0x20
locks held by kworker/1:0/8524: 3, on CPU#1:
 #0: ffff88810006b140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa1a/0x14c0
 #1: ffffc9002c73fc40 (netdev_work){+.+.}-{0:0}, at: process_scheduled_works+0xa1a/0x14c0
 #2: ffffffff90035040 (rtnl_mutex){+.+.}-{4:4}, at: netdev_work_proc+0x6f/0x770
locks held by syz-executor/8621: 5, on CPU#0:
 #0: ffffffff900264a8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x4e2/0x720
 #1: ffffffff8fd831c8 (devices_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x200/0x2f0
 #2: ffffffff8fd83388 (rdma_nets_rwsem){++++}-{4:4}, at: rdma_dev_init_net+0x238/0x2f0
 #3: ffff88812075cfe0 (&device->compat_devs_mutex){+.+.}-{4:4}, at: add_one_compat_dev+0xf0/0x650
 #4: ffffffff90035040 (rtnl_mutex){+.+.}-{4:4}, at: ib_get_eth_speed+0x173/0x7f0
locks held by syz.0.9521/8638: 2, on CPU#1:
 #0: ffffffff900264a8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x4e2/0x720
 #1: ffffffff90035040 (rtnl_mutex){+.+.}-{4:4}, at: ip_tunnel_init_net+0x2d5/0x820
locks held by syz-executor/8652: 1, on CPU#1:
 #0: ffffffff90035040 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0
locks held by syz-executor/8663: 1, on CPU#0:
 #0: ffffffff90035040 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0
locks held by syz-executor/8674: 1, on CPU#1:
 #0: ffffffff90035040 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0
locks held by syz-executor/8682: 1, on CPU#0:
 #0: ffffffff90035040 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0
locks held by syz-executor/8689: 1, on CPU#0:
 #0: ffffffff90035040 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0
locks held by syz-executor/8696: 1, on CPU#1:
 #0: ffffffff90035040 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0
locks held by syz-executor/8704: 1, on CPU#1:
 #0: ffffffff90035040 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0
locks held by syz-executor/8712: 1, on CPU#1:
 #0: ffffffff90035040 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x464/0x19e0
locks held by syz-executor/8723: 3, on CPU#1:
 #0: ffff8881a0980ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_unregister_dev+0x22a/0x5b0
 #1: ffff8881a09800b8 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x61f/0x10a0
 #2: ffffffff8eb604e8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 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+0x17d/0x390
 sys_info+0x135/0x170
 watchdog+0xfd7/0x1030
 kthread+0x38b/0x480
 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: 7957 Comm: kworker/u8:11 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: bond401 bond_3ad_state_machine_handler
RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20
Code: 56 59 d5 0a e9 d1 06 00 00 90 f3 0f 1e fa 0f 1f 00 fc 6a ff e8 51 05 00 00 48 89 c4 48 89 e7 e8 66 58 d5 0a e9 b1 06 00 00 90 <f3> 0f 1e fa 0f 1f 00 fc 6a ff e8 31 05 00 00 48 89 c4 48 89 e7 e8
RSP: 0018:ffffc90000007f18 EFLAGS: 00000006
RAX: 0000000000000012 RBX: 0000000000000283 RCX: 8000000000000102
RDX: 0000000000000002 RSI: ffffffff8e24a1a8 RDI: 0000000000000001
RBP: 000000000000000a R08: ffffffff90586d37 R09: 1ffffffff20b0da6
R10: dffffc0000000000 R11: fffffbfff20b0da7 R12: 0000000000000009
R13: 0000000000000008 R14: ffff888121028180 R15: 0000000000000100
FS:  0000000000000000(0000) GS:ffff88818d92d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055faaf3aec48 CR3: 000000000e946000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80
Code: f7 e8 6d 15 cb f5 f7 c3 00 02 00 00 74 05 e8 70 23 f7 f5 9c 58 a9 00 02 00 00 75 29 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 54 37 bc f5 65 48 8b 05 4c 00 97 07 48 85 c0 74 18 5b 41 5e e9
RSP: 0018:ffffc90000007f40 EFLAGS: 00000206
 handle_softirqs+0x226/0x860
 do_softirq+0x77/0xd0
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x100/0x140
 bond_3ad_state_machine_handler+0x5a7c/0x5d60
 process_scheduled_works+0xa88/0x14c0
 worker_thread+0xa47/0xfb0
 kthread+0x38b/0x480
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
