INFO: task syz-executor:6719 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:26872 pid:6719  tgid:6719  ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x14bc/0x5000
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1350
 inet_rtm_newaddr+0x3b0/0x18b0
 rtnetlink_rcv_msg+0x7cf/0xb70
 netlink_rcv_skb+0x208/0x470
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 __sys_sendto+0x3bd/0x520
 __x64_sys_sendto+0xde/0x100
 do_syscall_64+0xfa/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe98839165c
RSP: 002b:00007ffdeb221f60 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fe989114620 RCX: 00007fe98839165c
RDX: 0000000000000028 RSI: 00007fe989114670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffdeb221fb4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fe989114670 R15: 0000000000000000
 </TASK>
INFO: task syz-executor:6725 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:26872 pid:6725  tgid:6725  ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x14bc/0x5000
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1350
 inet_rtm_newaddr+0x3b0/0x18b0
 rtnetlink_rcv_msg+0x7cf/0xb70
 netlink_rcv_skb+0x208/0x470
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 __sys_sendto+0x3bd/0x520
 __x64_sys_sendto+0xde/0x100
 do_syscall_64+0xfa/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9551b9165c
RSP: 002b:00007ffeea808aa0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f9552914620 RCX: 00007f9551b9165c
RDX: 0000000000000028 RSI: 00007f9552914670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffeea808af4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f9552914670 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/0:1/10:
 #0: ffff888100076948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc900000f7b80 ((crda_timeout).work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffffffff8f311d08 (rtnl_mutex){+.+.}-{4:4}, at: crda_timeout_work+0x16/0x80
1 lock held by khungtaskd/35:
 #0: ffffffff8df41a20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
4 locks held by kworker/u11:0/56:
 #0: ffff8881988d5948 ((wq_completion)hci6#2){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc9000142fb80 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffff8881119140c0 (&hdev->lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x9b/0x920
 #3: ffffffff8f483788 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x51c/0x920
3 locks held by kworker/u10:17/4233:
 #0: ffff888100089948 ((wq_completion)events_unbound#2){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90023367b80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffffffff8f311d08 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60
4 locks held by kworker/u11:1/5216:
 #0: ffff888176902948 ((wq_completion)hci2){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90024957b80 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffff888111000ec0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d3/0x400
 #3: ffff8881110000c0 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x242/0xe30
1 lock held by dhcpcd/5573:
 #0: ffffffff8f311d08 (rtnl_mutex){+.+.}-{4:4}, at: inet6_rtm_newaddr+0x5b7/0xd20
2 locks held by getty/5655:
 #0: ffff8881785f50a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x449/0x1460
3 locks held by kworker/u8:2/5657:
 #0: ffff888175eb3948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90004237b80 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffffffff8f311d08 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30
2 locks held by sshd/5819:
6 locks held by kworker/u11:2/5838:
 #0: ffff888175765148 ((wq_completion)hci0){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90005057b80 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffff8881787e0ec0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d3/0x400
 #3: ffff8881787e00c0 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x242/0xe30
 #4: ffffffff8f483788 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x165/0x340
 #5: ffff888175765b38 (&conn->lock#2){+.+.}-{4:4}, at: l2cap_conn_del+0x7b/0x5b0
4 locks held by kworker/u11:3/5844:
 #0: ffff88819730f148 ((wq_completion)hci8#2){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90005507b80 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffff88816f9d40c0 (&hdev->lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x9b/0x920
 #3: ffffffff8f483788 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x51c/0x920
5 locks held by kworker/u11:4/5845:
 #0: ffff88810ff65148 ((wq_completion)hci3){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90005517b80 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffff8881aac98ec0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d3/0x400
 #3: ffff8881aac980c0 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x242/0xe30
 #4: ffffffff8f483788 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x165/0x340
3 locks held by kworker/1:4/5902:
 #0: ffff888100076948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90005b07b80 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffffffff8f311d08 (rtnl_mutex){+.+.}-{4:4}, at: reg_check_chans_work+0xa1/0xf00
2 locks held by syz.0.197/6636:
 #0: ffffffff8f304c70 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x3cc/0x570
 #1: ffffffff8f311d08 (rtnl_mutex){+.+.}-{4:4}, at: ops_undo_list+0x2a4/0x990
2 locks held by syz.3.207/6678:
 #0: ffffffff8dfa9128 (event_mutex){+.+.}-{4:4}, at: perf_trace_destroy+0x2e/0x150
 #1: ffffffff8df47578 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730
3 locks held by syz.3.207/6679:
1 lock held by syz-executor/6719:
 #0: ffffffff8f311d08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/6725:
 #0: ffffffff8f311d08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
2 locks held by dhcpcd/6727:
 #0: ffff888118279408 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: sock_close+0x9b/0x240
 #1: ffffffff8df47578 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730
1 lock held by dhcpcd/6728:
 #0: ffff88811827ac08 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: sock_close+0x9b/0x240
1 lock held by syz-executor/6730:
 #0: ffffffff8f311d08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/6736:
 #0: ffffffff8f311d08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
4 locks held by kworker/u11:5/6739:
 #0: ffff888197b84148 ((wq_completion)hci7#2){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90003e47b80 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffff8881688bc0c0 (&hdev->lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x9b/0x920
 #3: ffffffff8f483788 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x51c/0x920
1 lock held by syz-executor/6741:
 #0: ffffffff8f311d08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
5 locks held by kworker/u11:6/6742:
 #0: ffff8881b0cd7948 ((wq_completion)hci1){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90003df7b80 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffff88816e80cec0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d3/0x400
 #3: ffff88816e80c0c0 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x242/0xe30
 #4: ffffffff8f483788 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x165/0x340
5 locks held by kworker/u11:7/6744:
 #0: ffff88810aea1148 ((wq_completion)hci5){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90003de7b80 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffff8881bf464ec0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d3/0x400
 #3: ffff8881bf4640c0 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x242/0xe30
 #4: ffffffff8f483788 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x165/0x340
4 locks held by kworker/u11:8/6745:
 #0: ffff8881a9f22148 ((wq_completion)hci9#2){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90003ec7b80 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffff8881786180c0 (&hdev->lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x9b/0x920
 #3: ffffffff8f483788 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x51c/0x920
1 lock held by syz-executor/6747:
 #0: ffffffff8f311d08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/6753:
 #0: ffffffff8f311d08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
4 locks held by kworker/u11:10/6756:
 #0: ffff88810eb3a948 ((wq_completion)hci10#2){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90003c87b80 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffff88816c6500c0 (&hdev->lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x9b/0x920
 #3: ffffffff8f483788 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x51c/0x920
5 locks held by kworker/u11:11/6758:
 #0: ffff888172c7c948 ((wq_completion)hci4){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90003e77b80 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffff88816fde8ec0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d3/0x400
 #3: ffff88816fde80c0 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x242/0xe30
 #4: ffffffff8f483788 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x165/0x340
1 lock held by syz-executor/6759:
 #0: ffffffff8f311d08 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
4 locks held by kworker/u11:13/6762:
 #0: ffff8881aae8f948 ((wq_completion)hci11#2){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90003c17b80 ((work_completion)(&hdev->rx_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffff888176d340c0 (&hdev->lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x9b/0x920
 #3: ffffffff8f483788 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_remote_features_evt+0x51c/0x920

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

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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xf95/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x599/0xb30
 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: 6679 Comm: syz.3.207 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
RIP: 0010:asm_sysvec_apic_timer_interrupt+0x0/0x20
Code: 56 a6 5b 0a e9 61 06 00 00 90 f3 0f 1e fa 0f 1f 00 fc 6a ff e8 11 05 00 00 48 89 c4 48 89 e7 e8 66 a5 5b 0a e9 41 06 00 00 90 <f3> 0f 1e fa 0f 1f 00 fc 6a ff e8 f1 04 00 00 48 89 c4 48 89 e7 e8
RSP: 0018:ffffc900000079b8 EFLAGS: 00000006
RAX: c16e48f988a21300 RBX: 0000000000000a06 RCX: c16e48f988a21300
RDX: 0000000000000002 RSI: ffffffff8d792409 RDI: 0000000000000001
RBP: ffffc90000007a70 R08: ffffffff8f821f77 R09: 1ffffffff1f043ee
R10: dffffc0000000000 R11: fffffbfff1f043ef R12: dffffc0000000000
R13: ffff888177627460 R14: ffffffff99b20858 R15: 1ffff92000000f3c
FS:  00007fe7a78646c0(0000) GS:ffff88818e835000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562cec554ca3 CR3: 0000000115c96000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110
Code: 74 05 e8 7b 2a 6b f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 53 ae 32 f6 65 8b 05 ec 50 20 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc900000079e0 EFLAGS: 00000206
 debug_object_assert_init+0x20e/0x380
 __mod_timer+0x4a/0xf30
 call_timer_fn+0x16e/0x590
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x27d/0x850
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:finish_task_switch+0x242/0x940
Code: 0f 84 c2 01 00 00 48 85 db 0f 85 e9 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 28 4a cc 09 e8 83 75 37 00 fb 4c 8b 65 c0 <49> 8d bc 24 48 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc900044a7578 EFLAGS: 00000286
RAX: c16e48f988a21300 RBX: 0000000000000000 RCX: c16e48f988a21300
RDX: 0000000000000006 RSI: ffffffff8d792409 RDI: ffffffff8bc082e0
RBP: ffffc900044a75d0 R08: ffffffff8f821f77 R09: 1ffffffff1f043ee
R10: dffffc0000000000 R11: fffffbfff1f043ef R12: ffff8881100d57c0
R13: dffffc0000000000 R14: ffff888102aad7c0 R15: ffff88812103b498
 __schedule+0x14c4/0x5000
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x5d8/0x660
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:preempt_schedule_common+0x11/0xd0
Code: 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 41 57 41 56 53 49 bf 00 00 00 00 00 fc ff df eb 0d <48> f7 03 10 00 00 00 0f 84 9b 00 00 00 65 ff 05 6b bd 21 07 65 8b
RSP: 0018:ffffc900044a79c0 EFLAGS: 00000246
RAX: 1ffff1102201aaf8 RBX: ffff8881100d57c0 RCX: c16e48f988a21300
RDX: 0000000000000000 RSI: ffffffff8bc082c0 RDI: ffffffff8bc08280
RBP: ffffc900044a7a58 R08: ffffffff8f821f77 R09: 1ffffffff1f043ee
R10: dffffc0000000000 R11: fffffbfff1f043ef R12: 0000000000000000
R13: dffffc0000000000 R14: ffff8881100d6ce0 R15: dffffc0000000000
 preempt_schedule+0xae/0xc0
 preempt_schedule_thunk+0x16/0x30
 smp_call_function_single+0x470/0x590
 perf_install_in_context+0x593/0x8f0
 __se_sys_perf_event_open+0x1966/0x1d90
 do_syscall_64+0xfa/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe7a698f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe7a7864038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fe7a6be5fa0 RCX: 00007fe7a698f7c9
RDX: affffff7ffffffff RSI: 0000000000000000 RDI: 0000200000000180
RBP: 00007fe7a69f297f R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe7a6be6038 R14: 00007fe7a6be5fa0 R15: 00007ffe758c1728
 </TASK>
