INFO: task syz-executor:5817 blocked for more than 148 seconds.
      Not tainted 6.16.0-rc3-syzkaller-00159-g223e2288f4b8-dirty #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D
 stack:21960 pid:5817  tgid:5817  ppid:1      task_flags:0x40054c flags:0x00004006
Call Trace:
 <TASK>
 __schedule+0x16f5/0x4d00
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x724/0xe80
 tun_chr_close+0x3e/0x1c0
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 do_exit+0x6b5/0x22e0
 do_group_exit+0x21c/0x2d0
 get_signal+0x1286/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff96698ded7
RSP: 002b:00007ffc3ee12208 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007ff96698ded7
RDX: 00007ffc3ee12230 RSI: 00007ffc3ee122c0 RDI: 00007ffc3ee122c0
RBP: 00007ffc3ee122c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffc3ee13350
R13: 00007ff966a10925 R14: 000000000000f1e7 R15: 00007ffc3ee13390
 </TASK>
INFO: task kworker/0:7:6122 blocked for more than 149 seconds.
      Not tainted 6.16.0-rc3-syzkaller-00159-g223e2288f4b8-dirty #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:7     state:D stack:25280 pid:6122  tgid:6122  ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: events_power_efficient crda_timeout_work
Call Trace:
 <TASK>
 __schedule+0x16f5/0x4d00
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x724/0xe80
 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>

Showing all locks held in the system:
3 locks held by kworker/0:0/9:
 #0: ffff88801a481d48 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc900000c7bc0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f50ffc8 (rtnl_mutex){+.+.}-{4:4}, at: reg_check_chans_work+0x95/0xf00
1 lock held by khungtaskd/34:
 #0: ffffffff8e13ee60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
5 locks held by kworker/u9:2/53:
3 locks held by kworker/0:2/789:
 #0: ffff88801a480d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000456fbc0 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f50ffc8 (rtnl_mutex){+.+.}-{4:4}, at: switchdev_deferred_process_work+0xe/0x20
1 lock held by klogd/5254:
5 locks held by udevd/5265:
1 lock held by dhcpcd/5561:
2 locks held by getty/5644:
 #0: ffff8881098760a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900025c62f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
2 locks held by syz-executor/5817:
 #0: ffffffff8f50ffc8 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x3e/0x1c0
 #1: ffffffff8e144978 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730
1 lock held by syz-executor/5824:
 #0: ffffffff8e144840 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x570
4 locks held by kworker/u8:3/5839:
 #0: ffff88801b2f6948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc900042d7bc0 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f5033d0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf7/0x800
 #3: ffffffff8f50ffc8 (rtnl_mutex){+.+.}-{4:4}, at: wg_netns_pre_exit+0x1c/0x1d0
3 locks held by kworker/u8:4/5844:
 #0: ffff88802618d948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90004317bc0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f50ffc8 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30
3 locks held by kworker/0:6/5864:
3 locks held by kworker/u10:16/5997:
3 locks held by kworker/0:7/6122:
 #0: ffff88801a481d48 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90004befbc0 ((crda_timeout).work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f50ffc8 (rtnl_mutex){+.+.}-{4:4}, at: crda_timeout_work+0x15/0x50
3 locks held by kworker/u9:8/6125:
 #0: ffff88801a489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90006177bc0 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f50ffc8 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60
2 locks held by syz-executor/6131:
4 locks held by syz-executor/6134:
2 locks held by dhcpcd/6135:
 #0: ffff888108856258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcd0
 #1: ffffffff8e144978 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730
2 locks held by udevd/6136:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Not tainted 6.16.0-rc3-syzkaller-00159-g223e2288f4b8-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+0xfee/0x1030
 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: 5864 Comm: kworker/0:6 Not tainted 6.16.0-rc3-syzkaller-00159-g223e2288f4b8-dirty #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events_power_efficient neigh_periodic_work
RIP: 0010:nf_hook_slow+0x1f2/0x220
Code: fd 00 00 01 00 bd ff ff ff ff 0f 43 eb eb 12 e8 f4 ca 2b f8 90 0f 0b 90 31 ed eb 05 e8 e7 ca 2b f8 89 e8 48 83 c4 18 5b 41 5c <41> 5d 41 5e 41 5f 5d e9 02 0f d5 01 cc 44 89 f9 80 e1 07 fe c1 38
RSP: 0018:ffffc90000006ad8 EFLAGS: 00000282
RAX: 0000000000000000 RBX: ffffc90000006b60 RCX: ffff888021e4d640
RDX: 0000000000000100 RSI: ffffffff8f57e500 RDI: 0000000000000002
RBP: 0000000000000000 R08: ffff888021e4d640 R09: 0000000000000004
R10: 0000000000000003 R11: 0000000000000100 R12: 1ffff92000000d68
R13: ffff88810acdf498 R14: 1ffff1102159be90 R15: ffff88810acdf4a0
FS:  0000000000000000(0000) GS:ffff8880b8650000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa52582dff8 CR3: 0000000026f5c000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 NF_HOOK+0x215/0x3c0
 br_forward_finish+0xd3/0x130
 br_nf_forward_finish+0xa40/0xe60
 NF_HOOK+0x61b/0x6b0
 br_nf_forward_ip+0x647/0x7e0
 nf_hook_slow+0xc5/0x220
 NF_HOOK+0x215/0x3c0
 __br_forward+0x41e/0x600
 maybe_deliver+0xb5/0x160
 br_flood+0x31a/0x6a0
 br_handle_frame_finish+0x14b4/0x19b0
 br_nf_hook_thresh+0x3c6/0x4a0
 br_nf_pre_routing_finish_ipv6+0x948/0xd00
 br_nf_pre_routing_ipv6+0x37e/0x6b0
 br_handle_frame+0x982/0x14c0
 __netif_receive_skb_core+0x10e1/0x4180
 __netif_receive_skb+0x72/0x380
 process_backlog+0x60e/0x14f0
 __napi_poll+0xc7/0x480
 net_rx_action+0x707/0xe30
 handle_softirqs+0x286/0x870
 do_softirq+0xec/0x180
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x17d/0x1c0
 neigh_periodic_work+0xb41/0xd60
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
