INFO: task kworker/1:3:5315 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:3     state:D stack:23944 pid:5315  tgid:5315  ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: events_power_efficient crda_timeout_work
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1360
 crda_timeout_work+0x15/0x50
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
INFO: task kworker/u8:3:5877 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:3    state:D stack:23816 pid:5877  tgid:5877  ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: udp_tunnel_nic udp_tunnel_nic_device_sync_work
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1360
 udp_tunnel_nic_device_sync_work+0x29/0xa50
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
INFO: task syz.0.131:6391 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.131       state:D stack:28328 pid:6391  tgid:6390  ppid:5853   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1360
 ppp_ioctl+0x695/0x19a0
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0763d8ebe9
RSP: 002b:00007f0764b35038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0763fb5fa0 RCX: 00007f0763d8ebe9
RDX: 000000110c230007 RSI: 00000000c004743e RDI: 0000000000000003
RBP: 00007f0763e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0763fb6038 R14: 00007f0763fb5fa0 R15: 00007ffcaac61ba8
 </TASK>
INFO: task syz.0.131:6398 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.131       state:D stack:28488 pid:6398  tgid:6390  ppid:5853   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1360
 ppp_ioctl+0xcd/0x19a0
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0763d8ebe9
RSP: 002b:00007f0761ff6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0763fb6180 RCX: 00007f0763d8ebe9
RDX: 000000110c230040 RSI: 00000000c004743e RDI: 0000000000000004
RBP: 00007f0763e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0763fb6218 R14: 00007f0763fb6180 R15: 00007ffcaac61ba8
 </TASK>
INFO: task syz.1.134:6409 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.134       state:D stack:26536 pid:6409  tgid:6408  ppid:5848   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1360
 __tun_chr_ioctl+0x37a/0x1df0
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe75418ebe9
RSP: 002b:00007fe754f70038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe7543b5fa0 RCX: 00007fe75418ebe9
RDX: 0000200000002a40 RSI: 00000000800454e1 RDI: 0000000000000005
RBP: 00007fe754211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe7543b6038 R14: 00007fe7543b5fa0 R15: 00007fffddc98648
 </TASK>
INFO: task syz-executor:6412 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:26800 pid:6412  tgid:6412  ppid:1      task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1360
 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/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa534b90a7c
RSP: 002b:00007ffc1740cce0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fa5358e4620 RCX: 00007fa534b90a7c
RDX: 0000000000000028 RSI: 00007fa5358e4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffc1740cd34 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fa5358e4670 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e139ea0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
3 locks held by kworker/1:2/95:
 #0: ffff88801a482148 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90001c4fbc0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f537dc8 (rtnl_mutex){+.+.}-{4:4}, at: reg_check_chans_work+0x95/0xf30
3 locks held by kworker/1:3/5315:
 #0: ffff88801a482148 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000284fbc0 ((crda_timeout).work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f537dc8 (rtnl_mutex){+.+.}-{4:4}, at: crda_timeout_work+0x15/0x50
2 locks held by getty/5676:
 #0: ffff88801fed60a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900029062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
3 locks held by kworker/u8:3/5877:
 #0: ffff88810fd7f948 ((wq_completion)udp_tunnel_nic){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90003d6fbc0 ((work_completion)(&utn->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f537dc8 (rtnl_mutex){+.+.}-{4:4}, at: udp_tunnel_nic_device_sync_work+0x29/0xa50
3 locks held by kworker/u8:4/5913:
 #0: ffff88802220e948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90003ecfbc0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f537dc8 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30
8 locks held by syz.2.129/6380:
2 locks held by syz.0.131/6391:
 #0: ffffffff8ecf78e8 (ppp_mutex){+.+.}-{4:4}, at: ppp_ioctl+0xcd/0x19a0
 #1: ffffffff8f537dc8 (rtnl_mutex){+.+.}-{4:4}, at: ppp_ioctl+0x695/0x19a0
1 lock held by syz.0.131/6398:
 #0: ffffffff8ecf78e8 (ppp_mutex){+.+.}-{4:4}, at: ppp_ioctl+0xcd/0x19a0
1 lock held by syz.1.134/6409:
 #0: ffffffff8f537dc8 (rtnl_mutex){+.+.}-{4:4}, at: __tun_chr_ioctl+0x37a/0x1df0
1 lock held by syz-executor/6412:
 #0: ffffffff8f537dc8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/6417:
 #0: ffffffff8f537dc8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/6422:
 #0: ffffffff8f537dc8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/6431:
 #0: ffffffff8f537dc8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/6436:
 #0: ffffffff8f537dc8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/6441:
 #0: ffffffff8f537dc8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/6447:
 #0: ffffffff8f537dc8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/6453:
 #0: ffffffff8f537dc8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/6457:
 #0: ffffffff8f537dc8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0

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

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+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 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: 6380 Comm: syz.2.129 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:lock_release+0xd8/0x3e0
Code: 20 fa 48 c7 c7 9a a5 9c 8d e8 34 e5 db 09 65 ff 05 dd 12 03 11 c7 44 24 20 01 00 00 00 83 3d 0e 44 06 0e 00 0f 84 96 01 00 00 <41> 8b 87 e8 0a 00 00 85 c0 0f 84 1d 01 00 00 4c 89 6c 24 18 48 89
RSP: 0018:ffffc90000007310 EFLAGS: 00000002
RAX: 0000000000000000 RBX: 0000000000000202 RCX: 3812016448404d00
RDX: ffffc90000007401 RSI: ffffffff8d9ca59a RDI: ffffffff8be33300
RBP: dffffc0000000000 R08: ffffc90004daec18 R09: 0000000000000000
R10: ffffc90000007498 R11: fffff52000000e95 R12: ffffc90004daec28
R13: ffffffff8172c195 R14: ffffffff8e139ea0 R15: ffff888124bd0000
FS:  00007f4d50bf66c0(0000) GS:ffff8880b861c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563c6a19b680 CR3: 0000000105ca8000 CR4: 00000000000006f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 unwind_next_frame+0x19a9/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 kmalloc_reserve+0xbd/0x290
 __alloc_skb+0x142/0x2d0
 skb_copy+0x188/0x800
 mac80211_hwsim_tx_frame_no_nl+0xcd3/0x11c0
 mac80211_hwsim_tx_frame+0x1b5/0x200
 mac80211_hwsim_beacon_tx+0x3f0/0x860
 __iterate_interfaces+0x2ab/0x590
 ieee80211_iterate_active_interfaces_atomic+0xdb/0x180
 mac80211_hwsim_beacon+0xbb/0x1c0
 __hrtimer_run_queues+0x52c/0xc60
 hrtimer_run_softirq+0x187/0x2b0
 handle_softirqs+0x286/0x870
 __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:kasan_check_range+0xa8/0x2c0
Code: 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 41 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb 41 80 3b 00 0f 85 de 01 00 00 49 ff c3 <48> ff c3 75 ee e9 21 01 00 00 44 89 dd 83 e5 07 0f 84 b5 00 00 00
RSP: 0018:ffffc90004dae570 EFLAGS: 00000286
RAX: 0000000000000001 RBX: ffffffffffffffff RCX: ffffffff82158038
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea00043f3eb4
RBP: ffffea00043f3e88 R08: ffffea00043f3eb7 R09: 1ffffd400087e7d6
R10: dffffc0000000000 R11: fffff9400087e7d7 R12: 0000000000000001
R13: 00000e000014e123 R14: fffff9400087e7d7 R15: 1ffffd400087e7d6
 __free_frozen_pages+0xae8/0xd30
 pagetable_dtor_free+0x2d2/0x3b0
 __mmdrop+0xb5/0x580
 finish_task_switch+0x3ee/0x950
 __schedule+0x17a0/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:debugfs_alloc_inode+0x5/0x30
Code: 51 68 8f fe e9 23 ff ff ff 66 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 53 <48> 89 fb e8 93 f2 2b fe 48 8b 3d 24 43 2a 0a 48 81 c3 18 08 00 00
RSP: 0018:ffffc90004daeb10 EFLAGS: 00000293
RAX: ffffffff823b29ae RBX: ffffffff8bc9cd80 RCX: ffff888124bd0000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff888100ede000
RBP: ffff8881364dcf68 R08: ffff8881364dcf83 R09: 1ffff11026c9b9f0
R10: dffffc0000000000 R11: ffffffff8393b9b0 R12: dffffc0000000000
R13: ffffffff8cafe500 R14: ffff888100ede000 R15: ffffffff8393b9b0
 alloc_inode+0x6a/0x1b0
 new_inode+0x22/0x170
 __debugfs_create_file+0x14d/0x4f0
 debugfs_create_file_full+0x3f/0x60
 cfg80211_debugfs_rdev_add+0x60/0xf0
 wiphy_register+0x1d27/0x28d0
 ieee80211_register_hw+0x3425/0x4080
 mac80211_hwsim_new_radio+0x2f0e/0x5340
 hwsim_new_radio_nl+0xea4/0x1b10
 genl_family_rcv_msg_doit+0x215/0x300
 genl_rcv_msg+0x60e/0x790
 netlink_rcv_skb+0x208/0x470
 genl_rcv+0x28/0x40
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4d5298ebe9
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:00007f4d50bf6038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f4d52bb5fa0 RCX: 00007f4d5298ebe9
RDX: 0000000000000084 RSI: 0000200000000000 RDI: 0000000000000009
RBP: 00007f4d52a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4d52bb6038 R14: 00007f4d52bb5fa0 R15: 00007ffe0c1ea0a8
 </TASK>
