rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...0: (1 GPs behind) idle=ea5/1/0x4000000000000000 softirq=7088/7089 fqs=2100 
	(detected by 0, t=10506 jiffies, g=8313, q=437)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 154 Comm: kworker/u4:2 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: netns cleanup_net
RIP: 0010:cpu_max_bits_warn include/linux/cpumask.h:108 [inline]
RIP: 0010:cpumask_check include/linux/cpumask.h:115 [inline]
RIP: 0010:cpumask_test_cpu include/linux/cpumask.h:344 [inline]
RIP: 0010:cpu_online include/linux/cpumask.h:895 [inline]
RIP: 0010:trace_hrtimer_expire_exit include/trace/events/timer.h:283 [inline]
RIP: 0010:__run_hrtimer kernel/time/hrtimer.c:1693 [inline]
RIP: 0010:__hrtimer_run_queues+0x56a/0xc40 kernel/time/hrtimer.c:1754
Code: 43 0f b6 04 2f 84 c0 0f 85 26 03 00 00 c7 03 00 00 00 00 4c 8b 6c 24 20 0f 1f 44 00 00 e8 ce 11 10 00 65 44 8b 3d fe 5b 9a 7e <bf> 07 00 00 00 44 89 fe e8 19 15 10 00 41 83 ff 07 0f 87 ac 01 00
RSP: 0018:ffffc90000dd0d20 EFLAGS: 00000006
RAX: ffffffff8167b952 RBX: ffff88801bb10ad8 RCX: ffff88801bb10000
RDX: 0000000000010000 RSI: ffffffff8a0b2ac0 RDI: ffffffff8a59a480
RBP: ffffc90000dd0e98 R08: dffffc0000000000 R09: fffffbfff1ad323e
R10: fffffbfff1ad323e R11: 1ffffffff1ad323d R12: ffff8880b912a350
R13: 1ffff1101722546a R14: 0000000000000001 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000600 CR3: 000000000be8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 hrtimer_interrupt+0x3bb/0x8d0 kernel/time/hrtimer.c:1816
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1097 [inline]
 __sysvec_apic_timer_interrupt+0x137/0x4a0 arch/x86/kernel/apic/apic.c:1114
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1108
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:lockdep_unregister_key+0x4ae/0x500 kernel/locking/lockdep.c:6334
Code: 48 3b 84 24 80 00 00 00 75 39 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 0e 50 4c 08 41 f7 c4 00 02 00 00 74 8b fb 84 db <75> 8a eb 9b 0f 0b e9 58 ff ff ff 0f 0b e9 c4 fe ff ff 0f 0b e9 11
RSP: 0018:ffffc900020077a0 EFLAGS: 00000202
RAX: 7ce4b6df42a0b000 RBX: ffff88807d756901 RCX: 7ce4b6df42a0b000
RDX: 0000000000000001 RSI: ffffffff8a0b2620 RDI: ffffffff8a59a480
RBP: ffffc90002007880 R08: dffffc0000000000 R09: fffffbfff1fed941
R10: fffffbfff1fed941 R11: 1ffffffff1fed940 R12: 0000000000000a06
R13: ffff88807d756929 R14: ffffffff8ff6c018 R15: 1ffff92000400ef8
 wq_unregister_lockdep kernel/workqueue.c:3518 [inline]
 destroy_workqueue+0x87b/0xb20 kernel/workqueue.c:4485
 wg_destruct+0x19c/0x300 drivers/net/wireguard/device.c:239
 netdev_run_todo+0x82d/0xa40 net/core/dev.c:10691
 default_device_exit_batch+0x33b/0x390 net/core/dev.c:11668
 ops_exit_list net/core/net_namespace.c:177 [inline]
 cleanup_net+0x77b/0xb80 net/core/net_namespace.c:635
 process_one_work+0x863/0x1000 kernel/workqueue.c:2310
 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>