INFO: task dhcpcd:5578 blocked for more than 143 seconds.
      Not tainted 6.16.0-rc6-syzkaller-00135-gcf074eca0065 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:dhcpcd          state:D stack:21384 pid:5578  tgid:5578  ppid:5577   task_flags:0x400140 flags:0x00004002
Call Trace:
 <TASK>
 __schedule+0x16f5/0x4d00
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x724/0xe80
 rtnl_dumpit+0x92/0x200
 netlink_dump+0x6de/0xe60
 netlink_recvmsg+0x676/0xa30
 sock_recvmsg+0x22c/0x270
 ____sys_recvmsg+0x1c9/0x460
 ___sys_recvmsg+0x1b5/0x510
 __x64_sys_recvmsg+0x198/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f15d199b91e
RSP: 002b:00007ffdc1ed9e88 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007ffdc1edafb0 RCX: 00007f15d199b91e
RDX: 0000000000000000 RSI: 00007ffdc1edaed0 RDI: 000000000000000f
RBP: 00007ffdc1edaf40 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000000ce R11: 0000000000000246 R12: 0000000000000bd8
R13: 00007ffdc1edaeb4 R14: 00007ffdc1edaed0 R15: 00007ffdc1edaec0
 </TASK>
INFO: task kworker/u8:4:5867 blocked for more than 146 seconds.
      Not tainted 6.16.0-rc6-syzkaller-00135-gcf074eca0065 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:4    state:D stack:22824 pid:5867  tgid:5867  ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: ipv6_addrconf addrconf_verify_work
Call Trace:
 <TASK>
 __schedule+0x16f5/0x4d00
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x724/0xe80
 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-executor:9706 blocked for more than 147 seconds.
      Not tainted 6.16.0-rc6-syzkaller-00135-gcf074eca0065 #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:22760 pid:9706  tgid:9706  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: 0033:0x7eff0cd9083c
RSP: 002b:00007fff09c60860 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: 0000000000000038 RBX: 00007eff0dae4620 RCX: 00007eff0cd9083c
RDX: 0000000000000038 RSI: 00007eff0dae4670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fff09c608b4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000000 R14: 00007eff0dae4670 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
1 lock held by klogd/5269:
2 locks held by dhcpcd/5577:
 #0: ffffffff8f581f30 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40
 #1: ffffffff8f51bc48 (rtnl_mutex){+.+.}-{4:4}, at: nl80211_pre_doit+0x5f/0x930
2 locks held by getty/5659:
 #0: ffff88810a1190a0 (&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/u8:2/5851:
 #0: ffff88801b2f6948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000353fbc0 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f50f050 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf7/0x800
 #3: ffff888136639f98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140
3 locks held by kworker/u8:4/5867:
 #0: ffff888020d3e148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000369fbc0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8f51bc48 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30
3 locks held by kworker/1:6/6187:
 #0: ffff88801a480d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0
 #1: ffffc9000432fbc0 (free_ipc_work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0
 #2: ffffffff8e144bf8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730
4 locks held by kworker/u8:5/8395:
2 locks held by syz-executor/9694:
 #0: ffffffff8f50f050 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x304/0x4d0
 #1: ffffffff8f51bc48 (rtnl_mutex){+.+.}-{4:4}, at: gate_exit_net+0x30/0x110
1 lock held by syz-executor/9706:
 #0: ffffffff8f51bc48 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x3e/0x1c0
2 locks held by syz-executor/9712:
 #0: ffffffff8f51bc48 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x3e/0x1c0
 #1: ffffffff8e144bf8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730
2 locks held by syz-executor/9724:
 #0: ffffffff8f50f050 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x304/0x4d0
 #1: ffffffff8f51bc48 (rtnl_mutex){+.+.}-{4:4}, at: ip_tunnel_init_net+0x2ab/0x800
2 locks held by syz-executor/9739:
 #0: ffffffff8f50f050 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x304/0x4d0
 #1: ffffffff8f51bc48 (rtnl_mutex){+.+.}-{4:4}, at: register_nexthop_notifier+0x80/0x210
1 lock held by syz-executor/9751:
 #0: ffffffff8f51bc48 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/9753:
 #0: ffffffff8f51bc48 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/9754:
 #0: ffffffff8f51bc48 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/9762:
 #0: ffffffff8f51bc48 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/9768:
 #0: ffffffff8f51bc48 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x3b0/0x18b0
1 lock held by syz-executor/9770:
 #0: ffffffff8f51bc48 (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 6.16.0-rc6-syzkaller-00135-gcf074eca0065 #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: 8395 Comm: kworker/u8:5 Not tainted 6.16.0-rc6-syzkaller-00135-gcf074eca0065 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: bat_events batadv_tt_purge
RIP: 0010:lockdep_hardirqs_off+0x52/0x110
Code: 65 8b 05 31 45 32 07 a9 00 00 f0 00 74 69 83 3d d3 87 3d 0e 00 75 15 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 <75> 7e 65 8b 05 cd 81 32 07 85 c0 74 57 65 4c 8b 34 25 08 d0 9f 92
RSP: 0018:ffffc90000006fa8 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffffff8b701382 RCX: 982f6e31835bfd00
RDX: 0000000000000000 RSI: ffffffff8d9e70f4 RDI: ffffffff8be28c00
RBP: ffffc90000007078 R08: ffffc900000070a7 R09: 0000000000000000
R10: ffffc90000007098 R11: fffff52000000e15 R12: dffffc0000000000
R13: ffff888036291950 R14: 0000000000000a06 R15: 1ffff92000000dfc
FS:  0000000000000000(0000) GS:ffff8880b8623000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563b50c7d7d0 CR3: 0000000028960000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 trace_hardirqs_off+0x12/0x40
 _raw_spin_lock_irqsave+0x82/0xf0
 debug_object_active_state+0xa4/0x260
 call_rcu+0xc3/0x9c0
 skb_release_head_state+0x71/0x250
 consume_skb+0x60/0xf0
 nft_synproxy_eval_v4+0x376/0x560
 nft_synproxy_do_eval+0x345/0x570
 nft_do_chain+0x40c/0x1920
 nft_do_chain_inet+0x25d/0x340
 nf_hook_slow+0xc5/0x220
 NF_HOOK+0x206/0x3a0
 NF_HOOK+0x30c/0x3a0
 __netif_receive_skb+0x143/0x380
 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
 batadv_tt_local_purge+0x2a7/0x340
 batadv_tt_purge+0x35/0x9e0
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
