rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { P6841 P2531 1-...D } 2653 jiffies s: 9593 root: 0x2/T
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6855 Comm: syz-executor Not tainted 6.10.0-rc7-next-20240709-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:87 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:147 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xaf/0x140 kernel/locking/spinlock.c:194
Code: 02 00 00 74 05 e8 41 fc fd f5 4c 89 f3 48 c1 eb 03 42 80 3c 23 00 74 08 4c 89 f7 e8 5b 20 5d f6 48 c7 44 24 20 00 00 00 00 9c <8f> 44 24 20 42 80 3c 23 00 74 08 4c 89 f7 e8 4e 1f 5d f6 f6 44 24
RSP: 0018:ffffc90000a18cb8 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 1ffff9200014319c RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880b952c880
RBP: ffffc90000a18d50 R08: ffff8880b952c883 R09: 1ffff110172a5910
R10: dffffc0000000000 R11: ffffed10172a5911 R12: dffffc0000000000
R13: 1ffff92000143198 R14: ffffc90000a18ce0 R15: 0000000000000046
FS:  0000555570bfd500(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4f0d104000 CR3: 000000005a212000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x477/0xd50 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x396/0x990 kernel/time/hrtimer.c:1815
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1032 [inline]
 __sysvec_apic_timer_interrupt+0x110/0x3f0 arch/x86/kernel/apic/apic.c:1049
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1043
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lookup_page_ext mm/page_ext.c:253 [inline]
RIP: 0010:page_ext_get+0x180/0x2a0 mm/page_ext.c:536
Code: 83 e5 7f 48 c1 e5 05 48 01 eb eb 0e e8 09 fd 8d ff eb 05 e8 02 fd 8d ff 31 db 48 83 c3 10 48 89 d8 48 c1 e8 03 42 80 3c 38 00 <74> 08 48 89 df e8 26 d1 f4 ff 4c 8b 3b e8 0e c7 72 ff 89 c3 31 ff
RSP: 0018:ffffc9000cb4f710 EFLAGS: 00000246
RAX: 1ffff11027fff236 RBX: ffff88813fff91b0 RCX: ffff8880217c5a00
RDX: 0000000000000000 RSI: 0000000001a96240 RDI: 000000ffffffffc0
RBP: 00000000000001a0 R08: ffffffff82058e5e R09: 1ffffffff1f5fa55
R10: dffffc0000000000 R11: fffffbfff1f5fa56 R12: 000000000006a589
R13: 0000000000000001 R14: ffffffff82058d90 R15: dffffc0000000000
 __set_page_owner+0x9e/0x800 mm/page_owner.c:322
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493
 prep_new_page mm/page_alloc.c:1501 [inline]
 get_page_from_freelist+0x2ccb/0x2d80 mm/page_alloc.c:3480
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4738
 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2263
 vm_area_alloc_pages mm/vmalloc.c:3584 [inline]
 __vmalloc_area_node mm/vmalloc.c:3660 [inline]
 __vmalloc_node_range_noprof+0x971/0x1460 mm/vmalloc.c:3841
 vmalloc_user_noprof+0x74/0x80 mm/vmalloc.c:3995
 kcov_ioctl+0x59/0x640 kernel/kcov.c:706
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4f0cf757db
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007fff33652640 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f4f0cf757db
RDX: 0000000000040000 RSI: ffffffff80086301 RDI: 00000000000000e2
RBP: 00007f4f0d104868 R08: 00000000000000da R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000000c
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000009
 </TASK>
DEBUG: waiting rtnl_mutex for 8344 jiffies.
task:kworker/1:7     state:D stack:23624 pid:5198  tgid:5198  ppid:2      flags:0x00004000
Workqueue: events_power_efficient reg_check_chans_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 reg_check_chans_work+0x99/0xfd0 net/wireless/reg.c:2480
 process_one_work kernel/workqueue.c:3228 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3309
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3387
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
DEBUG: holding rtnl_mutex for 11379 jiffies.
task:syz-executor    state:D stack:19336 pid:6010  tgid:6010  ppid:1      flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 exp_funnel_lock kernel/rcu/tree_exp.h:320 [inline]
 synchronize_rcu_expedited+0x70a/0x830 kernel/rcu/tree_exp.h:967
 __tun_detach+0xa3c/0x1600 drivers/net/tun.c:669
 tun_detach drivers/net/tun.c:701 [inline]
 tun_chr_close+0x108/0x1b0 drivers/net/tun.c:3507
 __fput+0x24a/0x8a0 fs/file_table.c:422
 task_work_run+0x24f/0x310 kernel/task_work.c:204
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xa2f/0x27f0 kernel/exit.c:882
 do_group_exit+0x207/0x2c0 kernel/exit.c:1031
 get_signal+0x16a1/0x1740 kernel/signal.c:2909
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6f3bf76f07
RSP: 002b:00007ffdd198de68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6f3bf76f07
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdd198df20
RBP: 00007ffdd198df20 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffdd198efe0
R13: 00007f6f3bfe3515 R14: 000000000001bffb R15: 000000000001b766
 </TASK>
DEBUG: waiting rtnl_mutex for 11410 jiffies.
task:syz-executor    state:D stack:19600 pid:6537  tgid:6537  ppid:1      flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 tun_detach drivers/net/tun.c:698 [inline]
 tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3507
 __fput+0x24a/0x8a0 fs/file_table.c:422
 task_work_run+0x24f/0x310 kernel/task_work.c:204
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xa2f/0x27f0 kernel/exit.c:882
 do_group_exit+0x207/0x2c0 kernel/exit.c:1031
 get_signal+0x16a1/0x1740 kernel/signal.c:2909
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbd043746bc
RSP: 002b:00007ffd29f6d820 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: fffffffffffffe00 RBX: 0000000000000003 RCX: 00007fbd043746bc
RDX: 0000000000000028 RSI: 00007ffd29f6d910 RDI: 00000000000000f9
RBP: 00007ffd29f6d89c R08: 0000000000000000 R09: 0079746972756365
R10: 00007fbd044d17e0 R11: 0000000000000246 R12: 00007ffd29f6d910
R13: 00005555631045eb R14: 0000555563104590 R15: 000000000001b5d4
 </TASK>
DEBUG: waiting rtnl_mutex for 11343 jiffies.
task:syz-executor    state:D stack:21872 pid:6854  tgid:6854  ppid:6850   flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:149 [inline]
 rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2204
 __do_sys_sendto net/socket.c:2216 [inline]
 __se_sys_sendto net/socket.c:2212 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2212
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f16afd7796c
RSP: 002b:00007ffdae9e3250 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f16b0a34620 RCX: 00007f16afd7796c
RDX: 000000000000003c RSI: 00007f16b0a34670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffdae9e32a4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f16b0a34670 R15: 0000000000000000
 </TASK>
DEBUG: waiting rtnl_mutex for 11383 jiffies.
task:syz-executor    state:D stack:25360 pid:6853  tgid:6853  ppid:6849   flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:149 [inline]
 rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2204
 __do_sys_sendto net/socket.c:2216 [inline]
 __se_sys_sendto net/socket.c:2212 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2212
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3bf857796c
RSP: 002b:00007ffc400bf420 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f3bf9234620 RCX: 00007f3bf857796c
RDX: 0000000000000028 RSI: 00007f3bf9234670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffc400bf474 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f3bf9234670 R15: 0000000000000000
 </TASK>
DEBUG: waiting rtnl_mutex for 11423 jiffies.
task:kworker/u8:3    state:D stack:19880 pid:52    tgid:52    ppid:2      flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4193
 process_one_work kernel/workqueue.c:3228 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3309
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3387
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
DEBUG: waiting rtnl_mutex for 11444 jiffies.
task:syz.3.454       state:D stack:27640 pid:6865  tgid:6864  ppid:5467   flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:149 [inline]
 rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597
 ___sys_sendmsg net/socket.c:2651 [inline]
 __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa1c2375bd9
RSP: 002b:00007fa1c3198048 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa1c2503f60 RCX: 00007fa1c2375bd9
RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000004
RBP: 00007fa1c23e4e60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa1c2503f60 R15: 00007ffe69b79b18
 </TASK>
DEBUG: waiting rtnl_mutex for 11470 jiffies.
task:syz-executor    state:D stack:21872 pid:6846  tgid:6846  ppid:6836   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:149 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3807 [inline]
 rtnl_newlink+0xa0d/0x2070 net/core/rtnetlink.c:3830
 rtnetlink_rcv_msg+0x8a0/0x1180 net/core/rtnetlink.c:6728
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2204
 __do_sys_sendto net/socket.c:2216 [inline]
 __se_sys_sendto net/socket.c:2212 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2212
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fef0ef7796c
RSP: 002b:00007ffe134bfad0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fef0fc34620 RCX: 00007fef0ef7796c
RDX: 000000000000003c RSI: 00007fef0fc34670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffe134bfb24 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fef0fc34670 R15: 0000000000000000
 </TASK>
INFO: lockdep is turned off.
DEBUG: waiting rtnl_mutex for 8720 jiffies.
task:kworker/1:7     state:D stack:23624 pid:5198  tgid:5198  ppid:2      flags:0x00004000
Workqueue: events_power_efficient reg_check_chans_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 reg_check_chans_work+0x99/0xfd0 net/wireless/reg.c:2480
 process_one_work kernel/workqueue.c:3228 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3309
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3387
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
DEBUG: holding rtnl_mutex for 11755 jiffies.
task:syz-executor    state:D stack:19336 pid:6010  tgid:6010  ppid:1      flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 exp_funnel_lock kernel/rcu/tree_exp.h:320 [inline]
 synchronize_rcu_expedited+0x70a/0x830 kernel/rcu/tree_exp.h:967
 __tun_detach+0xa3c/0x1600 drivers/net/tun.c:669
 tun_detach drivers/net/tun.c:701 [inline]
 tun_chr_close+0x108/0x1b0 drivers/net/tun.c:3507
 __fput+0x24a/0x8a0 fs/file_table.c:422
 task_work_run+0x24f/0x310 kernel/task_work.c:204
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xa2f/0x27f0 kernel/exit.c:882
 do_group_exit+0x207/0x2c0 kernel/exit.c:1031
 get_signal+0x16a1/0x1740 kernel/signal.c:2909
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6f3bf76f07
RSP: 002b:00007ffdd198de68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6f3bf76f07
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdd198df20
RBP: 00007ffdd198df20 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffdd198efe0
R13: 00007f6f3bfe3515 R14: 000000000001bffb R15: 000000000001b766
 </TASK>
DEBUG: waiting rtnl_mutex for 11786 jiffies.
task:syz-executor    state:D stack:19600 pid:6537  tgid:6537  ppid:1      flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 tun_detach drivers/net/tun.c:698 [inline]
 tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3507
 __fput+0x24a/0x8a0 fs/file_table.c:422
 task_work_run+0x24f/0x310 kernel/task_work.c:204
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xa2f/0x27f0 kernel/exit.c:882
 do_group_exit+0x207/0x2c0 kernel/exit.c:1031
 get_signal+0x16a1/0x1740 kernel/signal.c:2909
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbd043746bc
RSP: 002b:00007ffd29f6d820 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: fffffffffffffe00 RBX: 0000000000000003 RCX: 00007fbd043746bc
RDX: 0000000000000028 RSI: 00007ffd29f6d910 RDI: 00000000000000f9
RBP: 00007ffd29f6d89c R08: 0000000000000000 R09: 0079746972756365
R10: 00007fbd044d17e0 R11: 0000000000000246 R12: 00007ffd29f6d910
R13: 00005555631045eb R14: 0000555563104590 R15: 000000000001b5d4
 </TASK>
DEBUG: waiting rtnl_mutex for 11719 jiffies.
task:syz-executor    state:D stack:21872 pid:6854  tgid:6854  ppid:6850   flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:149 [inline]
 rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2204
 __do_sys_sendto net/socket.c:2216 [inline]
 __se_sys_sendto net/socket.c:2212 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2212
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f16afd7796c
RSP: 002b:00007ffdae9e3250 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f16b0a34620 RCX: 00007f16afd7796c
RDX: 000000000000003c RSI: 00007f16b0a34670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffdae9e32a4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f16b0a34670 R15: 0000000000000000
 </TASK>
DEBUG: waiting rtnl_mutex for 11758 jiffies.
task:syz-executor    state:D stack:25360 pid:6853  tgid:6853  ppid:6849   flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:149 [inline]
 rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2204
 __do_sys_sendto net/socket.c:2216 [inline]
 __se_sys_sendto net/socket.c:2212 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2212
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3bf857796c
RSP: 002b:00007ffc400bf420 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f3bf9234620 RCX: 00007f3bf857796c
RDX: 0000000000000028 RSI: 00007f3bf9234670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffc400bf474 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f3bf9234670 R15: 0000000000000000
 </TASK>
DEBUG: waiting rtnl_mutex for 11799 jiffies.
task:kworker/u8:3    state:D stack:19880 pid:52    tgid:52    ppid:2      flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4193
 process_one_work kernel/workqueue.c:3228 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3309
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3387
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
DEBUG: waiting rtnl_mutex for 11820 jiffies.
task:syz.3.454       state:D stack:27640 pid:6865  tgid:6864  ppid:5467   flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:149 [inline]
 rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597
 ___sys_sendmsg net/socket.c:2651 [inline]
 __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa1c2375bd9
RSP: 002b:00007fa1c3198048 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa1c2503f60 RCX: 00007fa1c2375bd9
RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000004
RBP: 00007fa1c23e4e60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa1c2503f60 R15: 00007ffe69b79b18
 </TASK>
DEBUG: waiting rtnl_mutex for 11846 jiffies.
task:syz-executor    state:D stack:21872 pid:6846  tgid:6846  ppid:6836   flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:149 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3807 [inline]
 rtnl_newlink+0xa0d/0x2070 net/core/rtnetlink.c:3830
 rtnetlink_rcv_msg+0x8a0/0x1180 net/core/rtnetlink.c:6728
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2204
 __do_sys_sendto net/socket.c:2216 [inline]
 __se_sys_sendto net/socket.c:2212 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2212
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fef0ef7796c
RSP: 002b:00007ffe134bfad0 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fef0fc34620 RCX: 00007fef0ef7796c
RDX: 000000000000003c RSI: 00007fef0fc34670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffe134bfb24 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007fef0fc34670 R15: 0000000000000000
 </TASK>
INFO: lockdep is turned off.
DEBUG: waiting rtnl_mutex for 9096 jiffies.
task:kworker/1:7     state:D stack:23624 pid:5198  tgid:5198  ppid:2      flags:0x00004000
Workqueue: events_power_efficient reg_check_chans_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 reg_check_chans_work+0x99/0xfd0 net/wireless/reg.c:2480
 process_one_work kernel/workqueue.c:3228 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3309
 worker_thread+0x86d/0xd40 kernel/workqueue.c:3387
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
DEBUG: holding rtnl_mutex for 12131 jiffies.
task:syz-executor    state:D stack:19336 pid:6010  tgid:6010  ppid:1      flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 exp_funnel_lock kernel/rcu/tree_exp.h:320 [inline]
 synchronize_rcu_expedited+0x70a/0x830 kernel/rcu/tree_exp.h:967
 __tun_detach+0xa3c/0x1600 drivers/net/tun.c:669
 tun_detach drivers/net/tun.c:701 [inline]
 tun_chr_close+0x108/0x1b0 drivers/net/tun.c:3507
 __fput+0x24a/0x8a0 fs/file_table.c:422
 task_work_run+0x24f/0x310 kernel/task_work.c:204
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xa2f/0x27f0 kernel/exit.c:882
 do_group_exit+0x207/0x2c0 kernel/exit.c:1031
 get_signal+0x16a1/0x1740 kernel/signal.c:2909
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6f3bf76f07
RSP: 002b:00007ffdd198de68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f6f3bf76f07
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdd198df20
RBP: 00007ffdd198df20 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffdd198efe0
R13: 00007f6f3bfe3515 R14: 000000000001bffb R15: 000000000001b766
 </TASK>
DEBUG: waiting rtnl_mutex for 12162 jiffies.
task:syz-executor    state:D stack:19600 pid:6537  tgid:6537  ppid:1      flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 tun_detach drivers/net/tun.c:698 [inline]
 tun_chr_close+0x3e/0x1b0 drivers/net/tun.c:3507
 __fput+0x24a/0x8a0 fs/file_table.c:422
 task_work_run+0x24f/0x310 kernel/task_work.c:204
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xa2f/0x27f0 kernel/exit.c:882
 do_group_exit+0x207/0x2c0 kernel/exit.c:1031
 get_signal+0x16a1/0x1740 kernel/signal.c:2909
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbd043746bc
RSP: 002b:00007ffd29f6d820 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: fffffffffffffe00 RBX: 0000000000000003 RCX: 00007fbd043746bc
RDX: 0000000000000028 RSI: 00007ffd29f6d910 RDI: 00000000000000f9
RBP: 00007ffd29f6d89c R08: 0000000000000000 R09: 0079746972756365
R10: 00007fbd044d17e0 R11: 0000000000000246 R12: 00007ffd29f6d910
R13: 00005555631045eb R14: 0000555563104590 R15: 000000000001b5d4
 </TASK>
DEBUG: waiting rtnl_mutex for 12095 jiffies.
task:syz-executor    state:D stack:21872 pid:6854  tgid:6854  ppid:6850   flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:149 [inline]
 rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2204
 __do_sys_sendto net/socket.c:2216 [inline]
 __se_sys_sendto net/socket.c:2212 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2212
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f16afd7796c
RSP: 002b:00007ffdae9e3250 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f16b0a34620 RCX: 00007f16afd7796c
RDX: 000000000000003c RSI: 00007f16b0a34670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffdae9e32a4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f16b0a34670 R15: 0000000000000000
 </TASK>
DEBUG: waiting rtnl_mutex for 12135 jiffies.
task:syz-executor    state:D stack:25360 pid:6853  tgid:6853  ppid:6849   flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 rtnl_lock net/core/rtnetlink.c:149 [inline]
 rtnetlink_rcv_msg+0x847/0x1180 net/core/rtnetlink.c:6725
 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x7f0/0x990 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x221/0x270 net/socket.c:745
 __sys_sendto+0x3a4/0x4f0 net/socket.c:2204
 __do_sys_sendto net/socket.c:2216 [inline]
 __se_sys_sendto net/socket.c:2212 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2212
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3bf857796c
RSP: 002b:00007ffc400bf420 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f3bf9234620 RCX: 00007f3bf857796c
RDX: 0000000000000028 RSI: 00007f3bf9234670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffc400bf474 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007f3bf9234670 R15: 0000000000000000
 </TASK>
DEBUG: waiting rtnl_mutex for 12175 jiffies.
task:kworker/u8:3    state:D stack:19880 pid:52    tgid:52    ppid:2      flags:0x00004000
Workqueue: ipv6_addrconf addrconf_dad_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5239 [inline]
 __schedule+0x1800/0x4a60 kernel/sched/core.c:6603
 __schedule_loop kernel/sched/core.c:6680 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6695
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6752
 __mutex_lock_common kernel/locking/mutex.c:684 [inline]
 __mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
 addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4193
 process_one_work kernel/workqueue.c:3228 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3309