INFO: task syz-executor:26212 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:22576 pid:26212 tgid:26212 ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7bf/0x1550
 del_device_store+0xd6/0x370
 kernfs_fop_write_iter+0x3a4/0x540
 vfs_write+0x612/0xba0
 ksys_write+0x150/0x270
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f779055e90e
RSP: 002b:00007ffc133df788 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000055558124e500 RCX: 00007f779055e90e
RDX: 0000000000000001 RSI: 00007ffc133df810 RDI: 0000000000000005
RBP: 00007f77906358a7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc133df810 R14: 00007f7791354620 R15: 0000000000000003
 </TASK>
INFO: task syz-executor:26220 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:22320 pid:26220 tgid:26220 ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7bf/0x1550
 del_device_store+0xd6/0x370
 kernfs_fop_write_iter+0x3a4/0x540
 vfs_write+0x612/0xba0
 ksys_write+0x150/0x270
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3f78d5e90e
RSP: 002b:00007ffebba0f8d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000055555f38d500 RCX: 00007f3f78d5e90e
RDX: 0000000000000001 RSI: 00007ffebba0f960 RDI: 0000000000000005
RBP: 00007f3f78e358a7 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffebba0f960 R14: 00007f3f79b54620 R15: 0000000000000003
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5424:
 #0: ffff8881116200a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034762e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360
5 locks held by kworker/u8:2/5455:
 #0: ffff8881012d5940 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #1: ffffc9000418fc40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #2: ffffffff900202a8 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf5/0x810
 #3: ffff8881bf2f5610 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_destruct+0x116/0x310
 #4: ffffffff8eb5fe38 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530
3 locks held by kworker/1:4/5661:
6 locks held by kworker/1:9/22784:
1 lock held by syz-executor/26170:
 #0: ffffffff8eb5fe38 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530
4 locks held by syz-executor/26212:
 #0: ffff888175856450 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0
 #1: ffff88801cd0a480 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d8/0x540
 #2: ffff88810a7c9b48 (kn->active#48){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22b/0x540
 #3: ffffffff8f8a3880 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd6/0x370
4 locks held by syz-executor/26220:
 #0: ffff888175856450 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0
 #1: ffff88801fd7c880 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d8/0x540
 #2: ffff88810a7c9b48 (kn->active#48){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22b/0x540
 #3: ffffffff8f8a3880 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd6/0x370
7 locks held by syz-executor/26229:
 #0: ffff888175856450 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0
 #1: ffff888110d32880 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d8/0x540
 #2: ffff88810a7c9b48 (kn->active#48){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22b/0x540
 #3: ffffffff8f8a3880 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd6/0x370
 #4: ffff88802062c128 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb9/0x880
 #5: ffff888174e97258 (&devlink->lock_key){+.+.}-{4:4}, at: nsim_drv_remove+0x50/0x170
 #6: ffffffff8eb5fe38 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x530
4 locks held by syz-executor/26318:
 #0: ffff888175856450 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0
 #1: ffff88802b7f9080 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d8/0x540
 #2: ffff88810a7c9b48 (kn->active#48){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22b/0x540
 #3: ffffffff8f8a3880 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd6/0x370
4 locks held by syz-executor/26325:
 #0: ffff888175856450 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0
 #1: ffff88802b39a880 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d8/0x540
 #2: ffff88810a7c9b48 (kn->active#48){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22b/0x540
 #3: ffffffff8f8a3880 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd6/0x370
4 locks held by syz-executor/26396:
 #0: ffff888175856450 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0
 #1: ffff88801e8e4880 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d8/0x540
 #2: ffff88810a7c9b48 (kn->active#48){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22b/0x540
 #3: ffffffff8f8a3880 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd6/0x370
4 locks held by syz-executor/26487:
 #0: ffff888175856450 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0
 #1: ffff88810639a480 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d8/0x540
 #2: ffff88810a7c9b48 (kn->active#48){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22b/0x540
 #3: ffffffff8f8a3880 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd6/0x370
4 locks held by syz-executor/26509:
 #0: ffff888175856450 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0
 #1: ffff88802d39fc80 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d8/0x540
 #2: ffff88810a7c9b48 (kn->active#48){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22b/0x540
 #3: ffffffff8f8a3880 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd6/0x370
4 locks held by syz-executor/26550:
 #0: ffff888175856450 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0
 #1: ffff888105e91880 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d8/0x540
 #2: ffff88810a7c9b48 (kn->active#48){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x22b/0x540
 #3: ffffffff8f8a3880 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd6/0x370

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

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/0x380
 sys_info+0x135/0x170
 watchdog+0xfd7/0x1030
 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: 22784 Comm: kworker/1:9 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: wg-kex-wg1 wg_packet_handshake_receive_worker
RIP: 0010:lock_acquire+0x221/0x350
Code: ff ff ff e8 51 dd 30 0a f7 44 24 08 00 02 00 00 0f 84 3a ff ff ff 65 48 8b 05 db e7 ca 11 48 3b 44 24 58 75 33 fb 48 83 c4 60 <5b> 41 5c 41 5d 41 5e 41 5f 5d e9 80 df 33 0a cc 48 8d 3d 08 40 b8
RSP: 0000:ffffc90000a07ea0 EFLAGS: 00000286
RAX: a1b66750b4799e00 RBX: 0000000000000000 RCX: 0000000080000100
RDX: 00000000a42637f2 RSI: ffffffff8e4bf4f9 RDI: ffffffff8c4bba80
RBP: ffffffff8177827f R08: ffffffff8177827f R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb59c60 R12: 0000000000000002
R13: ffffffff8eb59c60 R14: 0000000000000000 R15: 0000000000000246
FS:  0000000000000000(0000) GS:ffff8882a8f46000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff11ebdaac CR3: 000000000e946000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 unwind_next_frame+0xac/0x2550
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 kasan_save_stack+0x3e/0x60
 kasan_record_aux_stack+0xbd/0xd0
 call_rcu+0xee/0x8b0
 skb_release_head_state+0x71/0x360
 __kfree_skb+0x24/0x210
 nft_synproxy_eval_v4+0x36a/0x4e0
 nft_synproxy_do_eval+0x335/0x550
 nft_do_chain+0x48d/0x1b10
 nft_do_chain_inet+0x360/0x4b0
 nf_hook_slow+0xc5/0x220
 NF_HOOK+0x21f/0x3c0
 NF_HOOK+0x336/0x3c0
 process_backlog+0xa34/0x1860
 __napi_poll+0xaa/0x330
 net_rx_action+0x61d/0xf50
 handle_softirqs+0x225/0x840
 __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:kasan_check_range+0x10/0x2c0
Code: 97 f3 fe 90 0f 0b cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 55 41 57 41 56 41 55 41 54 53 b0 01 <48> 85 f6 0f 84 ae 01 00 00 4c 8d 04 37 49 39 f8 0f 82 36 02 00 00
RSP: 0000:ffffc9000447e5a0 EFLAGS: 00000202
RAX: ffffc9000447ea01 RBX: 0000000000000028 RCX: ffffffff84d6d1fd
RDX: 0000000000000001 RSI: 0000000000000028 RDI: ffffc9000447ea00
RBP: ffffc9000447f190 R08: ffffc9000447eb67 R09: 1ffff9200088fd6c
R10: dffffc0000000000 R11: fffff5200088fd6d R12: ffffffff84d6d1fd
R13: 000731f61d936648 R14: ffffc9000447eb40 R15: ffffc9000447ea00
 __asan_memcpy+0x40/0x70
 curve25519_generic+0x2c3d/0xa470
 curve25519+0x5191/0x51a0
 wg_noise_handshake_consume_initiation+0x242/0x9b0
 wg_packet_handshake_receive_worker+0x674/0x10c0
 process_scheduled_works+0xa8e/0x14e0
 worker_thread+0xa47/0xfb0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
