INFO: task kworker/u8:1:13 blocked for more than 143 seconds.
      Not tainted 6.16.0-rc3-syzkaller-00159-g223e2288f4b8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:1    state:D stack:22968 pid:13    tgid:13    ppid:2      task_flags:0x4208160 flags:0x00004000
Workqueue: netns cleanup_net

Call Trace:
 <TASK>
 </TASK>

Showing all locks held in the system:
6 locks held by kworker/u8:1/13:
 #0: ffff88801b2f6948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90000107bc0 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f50fd50 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf7/0x800
 #3: ffff8881201fe0e8 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x10a/0x3d0
 #4: ffff8881201fd250 (&devlink->lock_key#4){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x11c/0x3d0
 #5: ffffffff8e144840 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x570
1 lock held by khungtaskd/34:
 #0: ffffffff8e13ee60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
4 locks held by kworker/1:1/51:
3 locks held by kworker/u10:3/1084:
3 locks held by kworker/u9:3/3992:
 #0: ffff88801a489148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc900086f7bc0 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f51c948 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60
2 locks held by klogd/5270:
1 lock held by dhcpcd/5577:
 #0: ffff8881006b9760 (&mm->mmap_lock){++++}-{4:4}, at: lock_mm_and_find_vma+0x32/0x300
1 lock held by dhcpcd/5578:
2 locks held by getty/5661:
 #0: ffff888108f110a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000280f2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400
4 locks held by syz-executor/5757:
1 lock held by syz-executor/5826:
 #0: ffffffff8f51c948 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x3e/0x1c0
5 locks held by syz-executor/5834:
3 locks held by kworker/0:6/5895:
 #0: ffff88801a480d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc90003a0fbc0 (reg_work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f51c948 (rtnl_mutex){+.+.}-{4:4}, at: reg_todo+0x1c/0x890
2 locks held by syz-executor/7742:
 #0: ffffffff8f50fd50 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x304/0x4d0
 #1: ffffffff8f51c948 (rtnl_mutex){+.+.}-{4:4}, at: ip_tunnel_init_net+0x2ab/0x800
1 lock held by syz-executor/7745:
3 locks held by syz-executor/7746:
2 locks held by dhcpcd/7747:
 #0: ffff8880453a4258 (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

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Not tainted 6.16.0-rc3-syzkaller-00159-g223e2288f4b8 #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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 1084 Comm: kworker/u10:3 Not tainted 6.16.0-rc3-syzkaller-00159-g223e2288f4b8 #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_unbound cfg80211_wiphy_work
RIP: 0010:__lock_acquire+0x6c1/0xd20
Code: b3 00 00 00 4c 89 f6 ba 08 00 00 00 e8 88 25 00 00 45 31 ff 85 c0 0f 84 f5 05 00 00 83 3d f6 36 0d 18 00 75 13 48 63 44 24 20 <48> 0f a3 05 87 a7 09 12 0f 83 15 05 00 00 31 ed 48 8b 3c 24 4c 8b
RSP: 0018:ffffc900001df268 EFLAGS: 00000046
RAX: 0000000000000007 RBX: 0000000000000006 RCX: ffffffff9348e8a8
RDX: 0000000000000008 RSI: ffff888107d58be0 RDI: ffff888107d58000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff81729af5
R10: ffffc900001df4b8 R11: ffffffff81acf6a0 R12: 0000000000000003
R13: 0000000000000001 R14: ffff888107d58be0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881a3c1d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f23fd6e56c0 CR3: 00000000285b6000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_acquire+0x120/0x360
 unwind_next_frame+0xc2/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x62/0x70
 kmem_cache_free+0x18f/0x400
 br_nf_dev_queue_xmit+0x4fe/0x2680
 NF_HOOK+0x61b/0x6b0
 br_nf_post_routing+0xb66/0xfe0
 nf_hook_slow+0xc5/0x220
 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
 ieee80211_ibss_rx_queued_mgmt+0x11e5/0x2ae0
 ieee80211_iface_work+0x806/0xfe0
 cfg80211_wiphy_work+0x2df/0x460
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
