INFO: task syz-executor:5826 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21464 pid:5826  tgid:5826  ppid:1      task_flags:0x40054c flags:0x00080003
Call Trace:
 <TASK>
 __schedule+0x14ef/0x4fb0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7fe/0x1300
 tun_chr_close+0x3e/0x1c0
 __fput+0x44f/0xa70
 task_work_run+0x1d9/0x270
 do_exit+0x69b/0x2310
 do_group_exit+0x21b/0x2d0
 get_signal+0x1284/0x1330
 arch_do_signal_or_restart+0xbc/0x830
 exit_to_user_mode_loop+0x86/0x480
 do_syscall_64+0x2b7/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f737519c51a
RSP: 002b:00007ffe28095168 EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: 0000000000000000 RBX: 00007ffe280951f0 RCX: 00007f737519c51a
RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000003 R08: 0000000000000370 R09: ffffffffff000000
R10: 00007f73753e2580 R11: 0000000000000206 R12: 00007f73753e2520
R13: 00007ffe2809518c R14: 0000000000000000 R15: 00007f73753e4020
 </TASK>
INFO: task syz-executor:7830 blocked for more than 144 seconds.
      Tainted: G             L      syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:26496 pid:7830  tgid:7830  ppid:5835   task_flags:0x40044c flags:0x00080003
Call Trace:
 <TASK>
 __schedule+0x14ef/0x4fb0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7fe/0x1300
 tun_chr_close+0x3e/0x1c0
 __fput+0x44f/0xa70
 task_work_run+0x1d9/0x270
 do_exit+0x69b/0x2310
 do_group_exit+0x21b/0x2d0
 get_signal+0x1284/0x1330
 arch_do_signal_or_restart+0xbc/0x830
 irqentry_exit+0x176/0x620
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7f82dd529f80
RSP: 002b:00007ffe463e8018 EFLAGS: 00010286
RAX: ffffffffffffffff RBX: 00007ffe463e8020 RCX: 0000000000000000
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00000000000000c8
RBP: 00007ffe463e845c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000000f6
R13: 00000000000927c0 R14: 000000000002a82e R15: 00007ffe463e84b0
 </TASK>

Showing all locks held in the system:
3 locks held by kworker/0:0/9:
 #0: ffff888100075948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9d4/0x17a0
 #1: ffffc900000e7bc0 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0xa0f/0x17a0
 #2: ffffffff8f7aa488 (rtnl_mutex){+.+.}-{4:4}, at: switchdev_deferred_process_work+0xe/0x20
2 locks held by kworker/u8:1/13:
4 locks held by kworker/1:0/24:
3 locks held by kworker/u9:0/26:
1 lock held by khungtaskd/35:
 #0: ffffffff8e35a360 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
3 locks held by kworker/u9:4/143:
3 locks held by kworker/u10:5/2090:
3 locks held by kworker/u10:6/2176:
3 locks held by kworker/u10:10/3496:
5 locks held by kworker/u9:10/4311:
3 locks held by kworker/u10:17/5165:
1 lock held by syslogd/5255:
5 locks held by udevd/5273:
4 locks held by dhcpcd/5569:
2 locks held by getty/5651:
 #0: ffff88816ccbc0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
1 lock held by syz-executor/5826:
 #0: ffffffff8f7aa488 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x3e/0x1c0
3 locks held by kworker/u8:4/5858:
 #0: ffff888174fde148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x9d4/0x17a0
 #1: ffffc900051f7bc0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa0f/0x17a0
 #2: ffffffff8f7aa488 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_verify_work+0x19/0x30
4 locks held by kworker/u8:5/5859:
1 lock held by syz-executor/7830:
 #0: ffffffff8f7aa488 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x3e/0x1c0
4 locks held by kworker/1:11/7837:
 #0: ffff888100076948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x9d4/0x17a0
 #1: ffffc900076f7bc0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0xa0f/0x17a0
 #2: ffffffff8f7aa488 (rtnl_mutex){+.+.}-{4:4}, at: reg_check_chans_work+0xa5/0xf40
 #3: ffff888105be8788 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x15a/0xf40
5 locks held by kworker/1:12/7838:
2 locks held by kworker/1:15/7844:
1 lock held by syz-executor/7845:
 #0: ffffffff8f7aa488 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0
1 lock held by syz-executor/7854:
 #0: ffffffff8f7aa488 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x404/0x1ad0
4 locks held by syz-executor/7859:
1 lock held by syz-executor/7860:
2 locks held by syz-executor/7864:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 35 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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+0xf90/0xfe0
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 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: 4311 Comm: kworker/u9:10 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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_release+0x259/0x3a0
Code: 41 8d 45 ff 41 89 c5 7f d0 4c 89 ff 4c 89 f6 48 8b 54 24 18 e8 e8 2e 00 00 48 8b 5c 24 08 48 c7 c7 be b1 d3 8d e8 17 b6 d9 09 <b8> ff ff ff ff 65 0f c1 05 6a a1 30 11 83 f8 01 75 2e 9c 58 a9 00
RSP: 0018:ffffc90000006eb0 EFLAGS: 00000002
RAX: 0000000000000000 RBX: 0000000000000202 RCX: 0000000080000101
RDX: 0000000000000005 RSI: ffffffff8dd3b1be RDI: ffffffff8be74c00
RBP: ffff888111bec678 R08: ffffc90000007960 R09: 0000000000000000
R10: ffffc90000007038 R11: fffff52000000e09 R12: 0000000000000005
R13: 0000000000000005 R14: ffffffff8e35a360 R15: ffff888111beba80
FS:  0000000000000000(0000) GS:ffff88818e324000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f00a6c15000 CR3: 000000016c174000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 unwind_next_frame+0x1aaa/0x23c0
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kmem_cache_free+0x195/0x610
 nft_synproxy_eval_v4+0x352/0x4e0
 nft_synproxy_do_eval+0x305/0x580
 nft_do_chain+0x45e/0x1990
 nft_do_chain_inet+0x29d/0x380
 nf_hook_slow+0xc5/0x220
 NF_HOOK+0x21f/0x3c0
 NF_HOOK+0x336/0x3c0
 __netif_receive_skb+0x143/0x370
 process_backlog+0x54e/0x1340
 __napi_poll+0xae/0x320
 net_rx_action+0x696/0xe30
 handle_softirqs+0x22a/0x7c0
 do_softirq+0x76/0xd0
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x130
 ieee80211_ibss_rx_queued_mgmt+0x1ac7/0x2c80
 ieee80211_iface_work+0x85e/0x12b0
 cfg80211_wiphy_work+0x2ab/0x450
 process_scheduled_works+0xaec/0x17a0
 worker_thread+0x89f/0xd90
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 ret_from_fork_asm+0x1a/0x30
 </TASK>
