rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (3 ticks this GP) idle=be5/1/0x4000000000000000 softirq=24508/24508 fqs=5244 
	(detected by 1, t=10502 jiffies, g=30185, q=354)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 10361 Comm: syz.2.2518 Not tainted 5.15.173-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024
RIP: 0010:strlen+0x2d/0x60 lib/string.c:566
Code: 56 41 54 53 49 89 fe 48 c7 c0 ff ff ff ff 49 bf 00 00 00 00 00 fc ff df 48 89 fb 49 89 c4 48 89 d8 48 c1 e8 03 42 0f b6 04 38 <84> c0 75 12 48 ff c3 49 8d 44 24 01 43 80 7c 26 01 00 75 dd eb 13
RSP: 0018:ffffc90000007518 EFLAGS: 00000803
RAX: 0000000000000000 RBX: ffffffff8a8c2de4 RCX: 0000000000007503
RDX: ffffffff818ac285 RSI: ffffffff8c91fc60 RDI: ffffffff8a8c2de0
RBP: ffffc90000007650 R08: dffffc0000000000 R09: fffffbfff1bd2d3e
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000003
R13: ffffffff818ac285 R14: ffffffff8a8c2de0 R15: dffffc0000000000
FS:  00007f114a1fe6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2c09b6 CR3: 000000007b5a4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 trace_event_get_offsets_lock include/trace/events/lock.h:39 [inline]
 perf_trace_lock+0x10c/0x440 include/trace/events/lock.h:39
 trace_lock_release include/trace/events/lock.h:58 [inline]
 lock_release+0x93c/0x9a0 kernel/locking/lockdep.c:5634
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 BPF_PROG_RUN_ARRAY include/linux/bpf.h:1346 [inline]
 trace_call_bpf+0x5a6/0x660 kernel/trace/bpf_trace.c:127
 perf_trace_run_bpf_submit+0x7b/0x1d0 kernel/events/core.c:9991
 perf_trace_preemptirq_template+0x31d/0x430 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0x10e/0x190 include/trace/events/preemptirq.h:40
 trace_hardirqs_on+0x57/0x80 kernel/trace/trace_preemptirq.c:44
 asm_sysvec_irq_work+0x16/0x20 arch/x86/include/asm/idtentry.h:713
RIP: 0010:rcu_read_unlock_special+0x84/0x520 kernel/rcu/tree_plugin.h:671
Code: f1 f1 f1 00 f2 f2 f2 49 89 04 17 66 41 c7 44 17 09 f3 f3 41 c6 44 17 0b f3 65 44 8b 25 bd 92 96 7e 41 f7 c4 00 00 f0 00 74 45 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 3a 00 00 00 00 66 42 c7 44 3a
RSP: 0018:ffffc90000007b00 EFLAGS: 00000206
RAX: 171300609c622300 RBX: 1ffff92000000f68 RCX: ffffffff81632d68
RDX: dffffc0000000000 RSI: ffffffff8a8b2a80 RDI: ffffffff8ad90540
RBP: ffffc90000007bd0 R08: dffffc0000000000 R09: fffffbfff20ec822
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffff8c923c00
R13: ffff88802173bfd8 R14: ffffc90000007b40 R15: 1ffff92000000f64
 __rcu_read_unlock+0x92/0x100 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:771 [inline]
 ieee80211_iterate_active_interfaces_atomic+0x12e/0x140 net/mac80211/util.c:831
 mac80211_hwsim_beacon+0xa7/0x180 drivers/net/wireless/mac80211_hwsim.c:1865
 __run_hrtimer kernel/time/hrtimer.c:1688 [inline]
 __hrtimer_run_queues+0x598/0xcf0 kernel/time/hrtimer.c:1752
 hrtimer_run_softirq+0x196/0x2c0 kernel/time/hrtimer.c:1769
 handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
 __do_softirq kernel/softirq.c:592 [inline]
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:641
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:653
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 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:preempt_schedule_irq+0xf2/0x1c0 kernel/sched/core.c:6777
Code: 89 f5 49 c1 ed 03 eb 0d 48 f7 03 08 00 00 00 0f 84 97 00 00 00 bf 01 00 00 00 e8 89 ab 1a f7 e8 54 22 4a f7 fb bf 01 00 00 00 <e8> a9 b3 ff ff 43 80 7c 3d 00 00 74 08 4c 89 f7 e8 a9 7c 8d f7 48
RSP: 0018:ffffc90002fa7240 EFLAGS: 00000286
RAX: 171300609c622300 RBX: 1ffff920005f4e50 RCX: ffffffff81632d68
RDX: dffffc0000000000 RSI: ffffffff8a8b2a80 RDI: 0000000000000001
RBP: ffffc90002fa7300 R08: dffffc0000000000 R09: fffffbfff20ec822
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920005f4e48
R13: 1ffff920005f4e4c R14: ffffc90002fa7260 R15: dffffc0000000000
 irqentry_exit+0x53/0x80 kernel/entry/common.c:432
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:kernfs_find_ns+0x3a2/0x500
Code: e8 93 c4 83 ff 48 83 c3 10 eb 18 89 ef 44 89 e6 e8 e3 c5 83 ff 44 39 e5 73 32 e8 79 c4 83 ff 48 83 c3 08 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 9f 9c cd ff 48 8b 1b 48 85 db 0f
RSP: 0018:ffffc90002fa73c8 EFLAGS: 00000a02
RAX: 1ffff1100c82372c RBX: ffff88806411b960 RCX: 0000000000040000
RDX: ffffc90003e2b000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: 00000000566d3fbc R08: ffffffff81fcaf03 R09: fffffbfff194a44a
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000007c73f40
R13: 0000000000000000 R14: ffffffff8b7ed440 R15: dffffc0000000000
 kernfs_remove_by_name_ns+0x37/0x100 fs/kernfs/dir.c:1563
 kernfs_remove_by_name include/linux/kernfs.h:598 [inline]
 remove_files fs/sysfs/group.c:28 [inline]
 sysfs_remove_group+0xfa/0x2a0 fs/sysfs/group.c:289
 sysfs_remove_groups+0x50/0xa0 fs/sysfs/group.c:313
 device_remove_groups drivers/base/core.c:2498 [inline]
 device_remove_attrs+0xc2/0x140 drivers/base/core.c:2698
 device_del+0x6da/0xbd0 drivers/base/core.c:3599
 unregister_netdevice_many+0x13a6/0x18f0 net/core/dev.c:11129
 ip_tunnel_delete_nets+0x2ed/0x330 net/ipv4/ip_tunnel.c:1151
 ops_exit_list net/core/net_namespace.c:177 [inline]
 setup_net+0x81c/0x9e0 net/core/net_namespace.c:355
 copy_net_ns+0x392/0x5d0 net/core/net_namespace.c:476
 create_new_namespaces+0x425/0x7a0 kernel/nsproxy.c:110
 copy_namespaces+0x365/0x3b0 kernel/nsproxy.c:178
 copy_process+0x1841/0x3ef0 kernel/fork.c:2208
 kernel_clone+0x210/0x960 kernel/fork.c:2603
 __do_sys_clone kernel/fork.c:2720 [inline]
 __se_sys_clone kernel/fork.c:2704 [inline]
 __x64_sys_clone+0x23f/0x290 kernel/fork.c:2704
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f114bd86759
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f114a1fdfe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f114bf3df80 RCX: 00007f114bd86759
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000042000000
RBP: 00007f114bdf975e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f114bf3df80 R15: 00007ffcf5f73668
 </TASK>