INFO: task syz-executor:22351 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:23096 pid:22351 tgid:22351 ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7f7/0x1550
 del_device_store+0xd7/0x370
 kernfs_fop_write_iter+0x3af/0x540
 vfs_write+0x61d/0xb90
 ksys_write+0x150/0x270
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2f60d5d60e
RSP: 002b:00007fffe51d5078 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000055558b7ec500 RCX: 00007f2f60d5d60e
RDX: 0000000000000001 RSI: 00007fffe51d5100 RDI: 0000000000000005
RBP: 00007f2f60e335ec R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fffe51d5100 R14: 00007f2f61b44620 R15: 0000000000000003
 </TASK>

Showing all locks held in the system:
6 locks held by kworker/1:0/24:
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
3 locks held by kworker/u9:4/97:
 #0: ffff88812103aea0 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x31/0x150
 #1: ffff888121024588 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880
 #2: ffff888121026118 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x1ae/0xf30
1 lock held by dhcpcd/5357:
2 locks held by getty/5439:
 #0: ffff88816af630a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034732e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
5 locks held by kworker/u8:4/5692:
 #0: ffff8881012b5940 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc90005637c40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffffffff8fdc0c28 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf4/0x800
 #3: ffff88802b819590 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_destruct+0x116/0x310
 #4: ffffffff8e963068 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770
2 locks held by kworker/1:10/19351:
7 locks held by syz-executor/22289:
 #0: ffff88816c07c410 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x227/0xb90
 #1: ffff888115f21880 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1de/0x540
 #2: ffff8881673fc788 (kn->active#48){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x231/0x540
 #3: ffffffff8f64ee40 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd7/0x370
 #4: ffff88816d101128 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb6/0x870
 #5: ffff88816d053258 (&devlink->lock_key#4){+.+.}-{4:4}, at: nsim_drv_remove+0x50/0x170
 #6: ffffffff8e963068 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770
4 locks held by syz-executor/22351:
 #0: ffff88816c07c410 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x227/0xb90
 #1: ffff888117613080 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1de/0x540
 #2: ffff8881673fc788 (kn->active#48){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x231/0x540
 #3: ffffffff8f64ee40 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd7/0x370
1 lock held by syz-executor/22410:
 #0: ffffffff8fdc0c28 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x4f7/0x730
1 lock held by dhcpcd/22506:
 #0: ffff888171bf2260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xe10
1 lock held by dhcpcd/22507:
 #0: ffff888171bf0260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xe10
1 lock held by dhcpcd/22508:
 #0: ffff888173aa0260 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x33/0xe10
2 locks held by rm/22513:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #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+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xfd3/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 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: 24 Comm: kworker/1:0 Not tainted syzkaller #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_long defense_work_handler
RIP: 0010:kasan_check_range+0x93/0x2c0
Code: 01 00 00 00 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 3d 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb <41> 80 3b 00 0f 85 9e 01 00 00 49 ff c3 48 ff c3 75 ee e9 1d 01 00
RSP: 0018:ffffc90000a07a48 EFLAGS: 00000086
RAX: 00000000ffffff01 RBX: ffffffffffffffff RCX: ffffffff81a2513c
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff9a6b9200
RBP: ffffc90000a07b30 R08: ffffffff9a6b9203 R09: 1ffffffff34d7240
R10: dffffc0000000000 R11: fffffbfff34d7240 R12: 0000000000000001
R13: ffffffff9a6b9208 R14: fffffbfff34d7241 R15: 1ffffffff34d7240
FS:  0000000000000000(0000) GS:ffff8882a928d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7c4ebff5b0 CR3: 000000000e74a000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 do_raw_spin_lock+0x11c/0x2f0
 _raw_spin_lock_irqsave+0x4c/0x60
 debug_object_deactivate+0x6c/0x3a0
 __hrtimer_run_queues+0x23a/0xa20
 hrtimer_interrupt+0x44b/0x950
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__this_cpu_preempt_check+0x0/0x20
Code: ae 28 8c e8 02 dc 7e f5 e8 3d 1d 8a f5 eb aa 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 89 fe 48 c7 c7 e0 ad 28 8c e9 fd fe ff ff cc cc cc
RSP: 0018:ffffc90000a07e98 EFLAGS: 00000246
RAX: ffffffff8a3a02b4 RBX: 1ffff92000140ff8 RCX: ffff888160a90000
RDX: 0000000000000100 RSI: 00000000fffffffe RDI: ffffffff8ceb2700
RBP: ffffc90000a08080 R08: ffff88819e699000 R09: 0000000000000000
R10: ffffc90000a07fe0 R11: fffff52000141000 R12: ffff88819e699150
R13: ffff8881a6ec27c0 R14: 0000000000000001 R15: dffffc0000000000
 ipt_do_table+0x13b2/0x1630
 nf_hook_slow+0xc5/0x220
 nf_hook+0x22a/0x3a0
 __ip_local_out+0x558/0x6a0
 ip_local_out+0x2a/0x190
 synproxy_send_client_synack+0x8c1/0xe30
 nft_synproxy_eval_v4+0x34a/0x4e0
 nft_synproxy_do_eval+0x305/0x580
 nft_do_chain+0x48d/0x1ae0
 nft_do_chain_inet+0x360/0x4b0
 nf_hook_slow+0xc5/0x220
 NF_HOOK+0x21f/0x3c0
 NF_HOOK+0x336/0x3c0
 process_backlog+0xaa3/0x1950
 __napi_poll+0xae/0x340
 net_rx_action+0x627/0xf70
 handle_softirqs+0x22a/0x840
 __irq_exit_rcu+0xca/0x220
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__local_bh_enable_ip+0xd8/0x130
Code: 8b e8 8c f4 20 0a 65 66 8b 05 5c 53 b1 11 66 85 c0 75 32 bf 01 00 00 00 e8 75 fa 0b 00 e8 e0 0d 46 00 fb 65 8b 05 38 53 b1 11 <85> c0 75 05 e8 2f be ab ff 5b 41 5e e9 97 ca 23 0a cc 90 0f 0b 90
RSP: 0018:ffffc900001e7928 EFLAGS: 00000206
RAX: 0000000080000000 RBX: 0000000000000200 RCX: 0000000000000046
RDX: 0000000000000006 RSI: ffffffff8dfa6898 RDI: ffffffff8c28ade0
RBP: ffffc900001e7aa0 R08: ffffffff9030b0f7 R09: 1ffffffff206161e
R10: dffffc0000000000 R11: fffffbfff206161f R12: dffffc0000000000
R13: ffff8881a6d36a38 R14: ffffffff8a05df36 R15: ffffffff8a05df36
 update_defense_level+0x91e/0xd70
 defense_work_handler+0x2d/0xd0
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
