INFO: task kworker/u8:0:12 blocked for more than 143 seconds.
      Not tainted 6.16.0-syzkaller-11113-gf3af62b6cee8-dirty #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:0    state:D stack:24456 pid:12    tgid:12    ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_verify_work
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1360
 addrconf_verify_work+0x19/0x30
 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.5.2016:13743 blocked for more than 143 seconds.
      Not tainted 6.16.0-syzkaller-11113-gf3af62b6cee8-dirty #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.2016      state:D stack:25896 pid:13743 tgid:13741 ppid:13550  task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1360
 dev_ioctl+0x7a4/0x1150
 sock_do_ioctl+0x22c/0x300
 sock_ioctl+0x576/0x790
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6b9c58ebe9
RSP: 002b:00007f6b9d367038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6b9c7b6090 RCX: 00007f6b9c58ebe9
RDX: 0000200000000080 RSI: 0000000000008914 RDI: 0000000000000035
RBP: 00007f6b9c611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6b9c7b6128 R14: 00007f6b9c7b6090 R15: 00007ffe723bc9d8
 </TASK>
INFO: task syz.5.2016:13751 blocked for more than 143 seconds.
      Not tainted 6.16.0-syzkaller-11113-gf3af62b6cee8-dirty #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.2016      state:D stack:28824 pid:13751 tgid:13741 ppid:13550  task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1360
 dev_ethtool+0x1d0/0x19b0
 dev_ioctl+0x392/0x1150
 sock_do_ioctl+0x22c/0x300
 sock_ioctl+0x576/0x790
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6b9c58ebe9
RSP: 002b:00007f6b9d346038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f6b9c7b6180 RCX: 00007f6b9c58ebe9
RDX: 0000200000000080 RSI: 0000000000008946 RDI: 000000000000003b
RBP: 00007f6b9c611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6b9c7b6218 R14: 00007f6b9c7b6180 R15: 00007ffe723bc9d8
 </TASK>
INFO: task syz-executor:13756 blocked for more than 143 seconds.
      Not tainted 6.16.0-syzkaller-11113-gf3af62b6cee8-dirty #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:26864 pid:13756 tgid:13756 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: 0033:0x7f519bb90a7c
RSP: 002b:00007ffc45ee2ef0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f519c8e4620 RCX: 00007f519bb90a7c
RDX: 0000000000000028 RSI: 00007f519c8e4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffc45ee2f44 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f519c8e4670 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/u8:0/12:
 #0: ffff888027690948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc900000f7bc0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30
1 lock held by khungtaskd/34:
 #0: ffffffff8e139e60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
3 locks held by kworker/0:2/974:
 #0: ffff88801a480d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90006ad7bc0 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: switchdev_deferred_process_work+0xe/0x20
7 locks held by kworker/u11:1/5233:
 #0: ffff88803fd0e948 ((wq_completion)hci5){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000a037bc0 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffff8880404c8dc0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1d4/0x3a0
 #3: ffff8880404c80b8 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x242/0xe30
 #4: ffffffff8f697308 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x165/0x310
 #5: ffff88803fd0cb38 (&conn->lock#2){+.+.}-{4:4}, at: l2cap_conn_del+0x70/0x680
 #6: ffffffff8e13f8f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730
2 locks held by getty/5671:
 #0: ffff88810da760a0 (&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
4 locks held by kworker/u8:3/5866:
 #0: ffff88801b2f7148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc900040dfbc0 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f525950 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf7/0x800
 #3: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: wg_netns_pre_exit+0x1c/0x1d0
3 locks held by kworker/1:9/9229:
 #0: ffff88801a482148 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000815fbc0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: reg_check_chans_work+0x95/0xf30
4 locks held by syz.6.2010/13720:
1 lock held by syz.5.2016/13743:
 #0: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: dev_ioctl+0x7a4/0x1150
1 lock held by syz.5.2016/13751:
 #0: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: dev_ethtool+0x1d0/0x19b0
1 lock held by syz-executor/13756:
 #0: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz.4.2028/13783:
 #0: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: __tun_chr_ioctl+0x37a/0x1df0
1 lock held by syz-executor/13786:
 #0: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/13789:
 #0: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/13792:
 #0: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/13795:
 #0: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/13799:
 #0: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/13802:
 #0: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/13805:
 #0: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/13808:
 #0: ffffffff8f5327c8 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Not tainted 6.16.0-syzkaller-11113-gf3af62b6cee8-dirty #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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 13720 Comm: syz.6.2010 Not tainted 6.16.0-syzkaller-11113-gf3af62b6cee8-dirty #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:native_apic_msr_write+0x39/0x50
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 cc cc cc cc cc f3 0f 1e fa 89 f6 31 d2 e9 62 99 8c 03 66
RSP: 0018:ffffc900001e0148 EFLAGS: 00000046
RAX: 000000000000006e RBX: ffff888136623900 RCX: 0000000000000838
RDX: 0000000000000000 RSI: 000000000000006e RDI: 0000000000000838
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff81adfebe
R10: 0000000000000003 R11: ffffffff81703490 R12: 00000000100064a9
R13: dffffc0000000000 R14: 000000000000006e R15: 0000000000000020
FS:  00007fcb94a706c0(0000) GS:ffff8881a3c2a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff535ee5000 CR3: 0000000112246000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lapic_next_event+0x11/0x20
 clockevents_program_event+0x1cf/0x360
 hrtimer_interrupt+0x620/0xaa0
 __sysvec_apic_timer_interrupt+0x10b/0x410
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_release+0x2b5/0x3e0
Code: 51 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b 05 cb f3 01 11 <48> 3b 44 24 28 0f 85 8b 00 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc900001e03b8 EFLAGS: 00000206
RAX: 53fca045452dde00 RBX: 0000000000000202 RCX: 53fca045452dde00
RDX: 0000000000000004 RSI: ffffffff8dba01ee RDI: ffffffff8be2fd00
RBP: ffff888121df2850 R08: 0000000000000000 R09: ffffffff81aaafdd
R10: ffffc900001e04f8 R11: ffffffff81ac34b0 R12: 0000000000000004
R13: 0000000000000004 R14: ffffffff8e139e60 R15: ffff888121df1cc0
 is_module_text_address+0x18b/0x1e0
 kernel_text_address+0x94/0xe0
 __kernel_text_address+0xd/0x40
 unwind_get_return_address+0x4d/0x90
 arch_stack_walk+0xfc/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
 __netdev_alloc_skb+0x108/0x970
 __ieee80211_beacon_get+0xc06/0x1880
 ieee80211_beacon_get_tim+0xb4/0x2b0
 mac80211_hwsim_beacon_tx+0x3ce/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:finish_task_switch+0x26b/0x950
Code: 0f 84 3c 01 00 00 48 85 db 0f 85 63 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 6f e1 e8 09 e8 1a 28 36 00 fb 4c 8b 65 c0 <49> 8d bc 24 18 16 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc90007c6ec38 EFLAGS: 00000282
RAX: 53fca045452dde00 RBX: 0000000000000000 RCX: 53fca045452dde00
RDX: 0000000000000007 RSI: ffffffff8d9b1620 RDI: ffffffff8be2fd00
RBP: ffffc90007c6ec90 R08: ffffffff8fa32437 R09: 1ffffffff1f46486
R10: dffffc0000000000 R11: fffffbfff1f46487 R12: ffff888121df1cc0
R13: dffffc0000000000 R14: ffff888039178000 R15: ffff88813663ab58
 __schedule+0x17a0/0x4cc0
 preempt_schedule_irq+0xb5/0x150
 irqentry_exit+0x6f/0x90
 asm_sysvec_call_function_single+0x1a/0x20
RIP: 0010:__get_pfnblock_flags_mask+0x29/0x240
Code: 90 55 41 57 41 56 41 55 41 54 53 50 49 89 d5 49 89 f6 49 89 ff 48 bd 00 00 00 00 00 fc ff df 48 89 f8 48 c1 e8 03 80 3c 28 00 <74> 08 4c 89 ff e8 9d 01 0e 00 49 8b 1f 48 83 fb ff 0f 84 e8 01 00
RSP: 0018:ffffc90007c6f030 EFLAGS: 00000246
RAX: 1ffffd400091bc40 RBX: ffffea00048de200 RCX: dffffc0000000000
RDX: 0000000000000017 RSI: 0000000000123788 RDI: ffffea00048de200
RBP: dffffc0000000000 R08: dffffc0000000000 R09: 0000000000000000
R10: ffffed10246f1000 R11: fffffbfff1f46487 R12: 0000000000000002
R13: 0000000000000017 R14: 0000000000123788 R15: ffffea00048de200
 __free_frozen_pages+0x5cf/0xd30
 __put_partials+0x156/0x1a0
 put_cpu_partial+0x17c/0x250
 __slab_free+0x2d5/0x3c0
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_noprof+0x1c1/0x3c0
 __kernfs_new_node+0xd7/0x7e0
 kernfs_new_node+0x102/0x210
 __kernfs_create_file+0x4b/0x2e0
 sysfs_add_file_mode_ns+0x238/0x300
 internal_create_group+0x66d/0x1110
 sysfs_create_groups+0x59/0x120
 device_add_attrs+0x1c4/0x5a0
 device_add+0x496/0xb50
 netdev_register_kobject+0x178/0x310
 register_netdevice+0x126c/0x1ae0
 ip6_tnl_create2+0x78/0x150
 ip6_tnl_locate+0x704/0x810
 ip6_tnl_siocdevprivate+0x630/0xad0
 dev_ifsioc+0xb57/0xf00
 dev_ioctl+0x84c/0x1150
 sock_ioctl+0x719/0x790
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcb93b8ebe9
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:00007fcb94a70038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fcb93db5fa0 RCX: 00007fcb93b8ebe9
RDX: 0000200000000080 RSI: 00000000000089f1 RDI: 000000000000000a
RBP: 00007fcb93c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcb93db6038 R14: 00007fcb93db5fa0 R15: 00007ffdc7e00a68
 </TASK>
