INFO: task syz.9.4867:27715 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.4867      state:D stack:25128 pid:27715 tgid:27705 ppid:27019  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5388 [inline]
 __schedule+0x1821/0x5740 kernel/sched/core.c:7189
 __schedule_loop kernel/sched/core.c:7268 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7283
 schedule_timeout+0xc3/0x2c0 kernel/time/sleep_timeout.c:75
 do_wait_for_common kernel/sched/completion.c:100 [inline]
 __wait_for_common kernel/sched/completion.c:121 [inline]
 wait_for_common kernel/sched/completion.c:132 [inline]
 wait_for_completion+0x2cc/0x5e0 kernel/sched/completion.c:153
 __cpu_map_entry_alloc kernel/bpf/cpumap.c:501 [inline]
 cpu_map_update_elem+0xa4b/0x1100 kernel/bpf/cpumap.c:609
 bpf_map_update_value+0x236/0x920 kernel/bpf/syscall.c:261
 map_update_elem+0x5fa/0x9d0 kernel/bpf/syscall.c:1805
 __sys_bpf+0x6fa/0x950 kernel/bpf/syscall.c:6262
 __do_sys_bpf kernel/bpf/syscall.c:6387 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:6385 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6385
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f47ebd9ce59
RSP: 002b:00007f47eccec028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f47ec016090 RCX: 00007f47ebd9ce59
RDX: 0000000000000020 RSI: 0000200000000080 RDI: 0000000000000002
RBP: 00007f47ebe32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f47ec016128 R14: 00007f47ec016090 R15: 00007fff2f756a18
 </TASK>

Showing all locks held in the system:
1 lock held by kworker/R-rcu_g/4:
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2787 [inline]
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xc4d/0x1130 kernel/workqueue.c:3649
1 lock held by kworker/R-mm_pe/14:
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2787 [inline]
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xc4d/0x1130 kernel/workqueue.c:3649
1 lock held by khungtaskd/31:
 #0: ffffffff8e95cc20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 #0: ffffffff8e95cc20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #0: ffffffff8e95cc20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by getty/5387:
 #0: ffff8880371360a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900032332e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0 drivers/tty/n_tty.c:2211
3 locks held by kworker/1:5/5768:
 #0: ffff88813fe43140 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline]
 #0: ffff88813fe43140 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860 kernel/workqueue.c:3397
 #1: ffffc90004e1fc40 (drain_vmap_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3290 [inline]
 #1: ffffc90004e1fc40 (drain_vmap_work){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860 kernel/workqueue.c:3397
 #2: ffffffff8ea81140 (vmap_purge_lock){+.+.}-{4:4}, at: drain_vmap_area_work+0x17/0x40 mm/vmalloc.c:2429
2 locks held by kworker/0:42/8831:
3 locks held by kworker/0:43/8832:
1 lock held by kworker/0:46/8835:
2 locks held by kworker/0:48/8837:
2 locks held by kworker/0:49/8838:
2 locks held by kworker/0:51/8840:
4 locks held by kworker/u8:35/24075:
 #0: ffff88801be8e140 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline]
 #0: ffff88801be8e140 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860 kernel/workqueue.c:3397
 #1: ffffc9000527fc40 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3290 [inline]
 #1: ffffc9000527fc40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860 kernel/workqueue.c:3397
 #2: ffffffff8fdbafe8 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf4/0x800 net/core/net_namespace.c:673
 #3: ffff888077739590 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_destruct+0x116/0x310 drivers/net/wireguard/device.c:249
1 lock held by kworker/R-wg-cr/26771:
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x2e/0x3a0 kernel/workqueue.c:2729
1 lock held by kworker/R-wg-cr/26775:
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2787 [inline]
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xc4d/0x1130 kernel/workqueue.c:3649
2 locks held by kworker/R-wg-cr/27103:
1 lock held by kworker/R-wg-cr/27104:
1 lock held by kworker/R-wg-cr/27105:
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2787 [inline]
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xc4d/0x1130 kernel/workqueue.c:3649
1 lock held by kworker/R-wg-cr/27330:
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x2e/0x3a0 kernel/workqueue.c:2729
1 lock held by kworker/R-wg-cr/27333:
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x2e/0x3a0 kernel/workqueue.c:2729
1 lock held by kworker/R-wg-cr/27334:
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2787 [inline]
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xc4d/0x1130 kernel/workqueue.c:3649
1 lock held by kworker/R-wg-cr/27335:
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2787 [inline]
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xc4d/0x1130 kernel/workqueue.c:3649
1 lock held by kworker/R-wg-cr/27338:
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2787 [inline]
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0xc4d/0x1130 kernel/workqueue.c:3649
1 lock held by kworker/R-wg-cr/27341:
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x2e/0x3a0 kernel/workqueue.c:2729
2 locks held by kworker/R-wg-cr/28079:
2 locks held by kworker/R-wg-cr/28186:
2 locks held by kworker/R-wg-cr/28189:
1 lock held by kworker/R-wg-cr/28192:
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x2e/0x3a0 kernel/workqueue.c:2729
2 locks held by kworker/R-wg-cr/28197:
1 lock held by kworker/R-bond5/29903:
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline]
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x81/0x1130 kernel/workqueue.c:3586
1 lock held by kworker/R-nfc4_/30008:
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: set_pf_worker kernel/workqueue.c:3403 [inline]
 #0: ffffffff8e7fae80 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x105b/0x1130 kernel/workqueue.c:3664
1 lock held by syz.1.5439/30037:
 #0: ffffffff8e962f28 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline]
 #0: ffffffff8e962f28 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770 kernel/rcu/tree_exp.h:961

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 __sys_info lib/sys_info.c:157 [inline]
 sys_info+0x135/0x170 lib/sys_info.c:165
 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
 watchdog+0xfd3/0x1030 kernel/hung_task.c:561
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 27103 Comm: kworker/R-wg-cr Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue:  0x0 (wg-crypt-wg0)
RIP: 0010:unwind_next_frame+0x484/0x2550 arch/x86/kernel/unwind_orc.c:520
Code: d2 84 c0 48 0f 45 d1 48 89 15 c8 cb c8 11 48 85 d2 0f 84 3b 02 00 00 4c 8d 62 04 4c 8d 6a 05 4c 89 e0 48 c1 e8 03 0f b6 04 28 <84> c0 0f 85 c2 19 00 00 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 0f
RSP: 0018:ffffc90000006ed8 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: ffffffff904c5dc0 RCX: ffffffff904c5dc8
RDX: ffffffff90c9b006 RSI: ffffffff90c9b006 RDI: ffffffff8c28b980
RBP: dffffc0000000000 R08: 000000000000000c R09: ffffffff8e95cc20
R10: ffffc90000006ff8 R11: ffffffff81b0e0e0 R12: ffffffff90c9b00a
R13: ffffffff90c9b00b R14: ffffc90000006fa8 R15: ffffffff904c5dc4
FS:  0000000000000000(0000) GS:ffff88812528b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe178f52000 CR3: 000000000e74a000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2689 [inline]
 slab_free mm/slub.c:6251 [inline]
 kmem_cache_free+0x182/0x650 mm/slub.c:6378
 nft_synproxy_eval_v4+0x352/0x4e0 net/netfilter/nft_synproxy.c:61
 nft_synproxy_do_eval+0x305/0x580 net/netfilter/nft_synproxy.c:142
 expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline]
 nft_do_chain+0x48d/0x1ae0 net/netfilter/nf_tables_core.c:285
 nft_do_chain_inet+0x360/0x4b0 net/netfilter/nft_chain_filter.c:162
 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline]
 nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619
 nf_hook include/linux/netfilter.h:273 [inline]
 NF_HOOK+0x21f/0x3c0 include/linux/netfilter.h:316
 NF_HOOK+0x336/0x3c0 include/linux/netfilter.h:318
 __netif_receive_skb_one_core net/core/dev.c:6203 [inline]
 __netif_receive_skb net/core/dev.c:6316 [inline]
 process_backlog+0xaa3/0x1950 net/core/dev.c:6667
 __napi_poll+0xae/0x340 net/core/dev.c:7726
 napi_poll net/core/dev.c:7789 [inline]
 net_rx_action+0x627/0xf70 net/core/dev.c:7946
 handle_softirqs+0x22a/0x840 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1061
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:188 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:206
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 0a 73 f5 f5 48 89 df e8 12 e8 f5 f5 e8 8d 82 21 f6 fb bf 01 00 00 00 <e8> 42 67 e7 f5 65 8b 05 3b ee 8c 07 85 c0 74 07 5b c3 cc cc cc cc
RSP: 0018:ffffc9000205fcb8 EFLAGS: 00000202
RAX: 00000000001bcec1 RBX: ffff8880b863a800 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8dfafc25 RDI: 0000000000000001
RBP: ffff888050af60b8 R08: ffffffff90309df7 R09: 1ffffffff20613be
R10: dffffc0000000000 R11: fffffbfff20613bf R12: dffffc0000000000
R13: ffff888050af6000 R14: ffff88802ba76a68 R15: ffffe8ffffcdbe88
 rescuer_thread+0xbe9/0x1130 kernel/workqueue.c:3647
 kthread+0x389/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>