rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-....: (5 ticks this GP) idle=6ad/1/0x4000000000000002 softirq=18521/18521 fqs=5249 
	(detected by 1, t=10502 jiffies, g=25281, q=909)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 8196 Comm: syz.0.1085 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:29 [inline]
RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:28 [inline]
RIP: 0010:__irq_work_queue_local+0x32/0x190 kernel/irq_work.c:56
Code: 48 89 fb 49 bf 00 00 00 00 00 fc ff df e8 36 1d f4 ff 4c 8d 73 08 4c 89 f7 be 04 00 00 00 e8 95 2a 39 00 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 f6 00 00 00 45 8b 26 44 89 e6 83 e6 04
RSP: 0018:ffffc90000007658 EFLAGS: 00000806
RAX: 1ffff1101720763f RBX: ffff8880b903b1f0 RCX: ffffffff8185051b
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880b903b1f8
RBP: 0000000000000000 R08: ffff8880b903b1fb R09: 1ffff1101720763f
R10: dffffc0000000000 R11: ffffed1017207640 R12: 0000000000000000
R13: dffffc0000000001 R14: ffff8880b903b1f8 R15: dffffc0000000000
FS:  00007fd8876576c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f80a7d5aff8 CR3: 00000000642fb000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 0000000000000600
Call Trace:
 <IRQ>
 irq_work_queue_on+0x11e/0x220 kernel/irq_work.c:109
 rcu_read_unlock_special+0x37b/0x4a0 kernel/rcu/tree_plugin.h:667
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 BPF_PROG_RUN_ARRAY include/linux/bpf.h:1444 [inline]
 trace_call_bpf+0x4f9/0x5b0 kernel/trace/bpf_trace.c:127
 perf_trace_run_bpf_submit+0x79/0x1c0 kernel/events/core.c:10016
 perf_trace_preemptirq_template+0x2aa/0x360 include/trace/events/preemptirq.h:14
 trace_irq_enable_rcuidle+0x108/0x180 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+0x7f/0x4a0 kernel/rcu/tree_plugin.h:674
Code: eb 03 48 b8 f1 f1 f1 f1 f8 f2 f2 f2 4a 89 04 2b 42 c7 44 2b 08 f8 f3 f3 f3 65 44 8b 35 e2 f0 9c 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 20 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08
RSP: 0018:ffffc90000007b00 EFLAGS: 00000206
RAX: ea9be4c439a70100 RBX: 1ffff92000000f64 RCX: ea9be4c439a70100
RDX: dffffc0000000000 RSI: ffffffff8a2b2780 RDI: ffffffff8a79f800
RBP: ffffc90000007bd8 R08: ffffffff901d30cf R09: 1ffffffff203a619
R10: dffffc0000000000 R11: fffffbfff203a61a R12: ffffffff8c322f00
R13: dffffc0000000000 R14: 0000000000000246 R15: 0000000000000001
 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:422
 rcu_read_unlock include/linux/rcupdate.h:772 [inline]
 ieee80211_iterate_active_interfaces_atomic+0x132/0x140 net/mac80211/util.c:831
 mac80211_hwsim_beacon+0x9b/0x180 drivers/net/wireless/mac80211_hwsim.c:1865
 __run_hrtimer kernel/time/hrtimer.c:1685 [inline]
 __hrtimer_run_queues+0x4eb/0xb70 kernel/time/hrtimer.c:1749
 hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766
 handle_softirqs+0x339/0x830 kernel/softirq.c:576
 __do_softirq kernel/softirq.c:610 [inline]
 invoke_softirq kernel/softirq.c:450 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:659
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:671
 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:kfree_const+0x0/0x40 mm/util.c:38
Code: 56 78 16 00 eb 94 0f 1f 40 00 53 48 89 fb e8 77 6c d1 ff 48 81 c3 28 01 00 00 48 89 df 5b e9 b7 9c 27 00 00 00 cc cc 00 00 cc <53> 48 89 fb e8 57 6c d1 ff 48 81 fb 00 00 20 8a 0f 92 c0 48 81 fb
RSP: 0018:ffffc900032bf3f8 EFLAGS: 00000246
RAX: 1ffff1100b6b3129 RBX: ffff88805b598910 RCX: ffff88807cabbb80
RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffffffff8b209f60
RBP: 0000000000000002 R08: ffff88805b598917 R09: 1ffff1100b6b3122
R10: dffffc0000000000 R11: ffffed100b6b3123 R12: 1ffff1100b6b3122
R13: ffff88805b598914 R14: ffff88805b5989a8 R15: dffffc0000000000
 kernfs_put+0x1bd/0x490 fs/kernfs/dir.c:538
 kernfs_remove_by_name_ns+0x99/0x100 fs/kernfs/dir.c:1567
 kernfs_remove_by_name include/linux/kernfs.h:598 [inline]
 remove_files fs/sysfs/group.c:28 [inline]
 sysfs_remove_group+0xf8/0x290 fs/sysfs/group.c:289
 sysfs_remove_groups+0x50/0xa0 fs/sysfs/group.c:313
 device_del+0x6a7/0xaf0 drivers/base/core.c:3599
 unregister_netdevice_many+0x1518/0x19f0 net/core/dev.c:11174
 ip_tunnel_delete_nets+0x320/0x370 net/ipv4/ip_tunnel.c:1137
 ops_exit_list net/core/net_namespace.c:177 [inline]
 setup_net+0x844/0xa10 net/core/net_namespace.c:365
 copy_net_ns+0x348/0x5b0 net/core/net_namespace.c:503
 create_new_namespaces+0x3d3/0x6f0 kernel/nsproxy.c:110
 copy_namespaces+0x37d/0x3e0 kernel/nsproxy.c:178
 copy_process+0x1834/0x3e20 kernel/fork.c:2293
 kernel_clone+0x23f/0x990 kernel/fork.c:2679
 __do_sys_clone kernel/fork.c:2796 [inline]
 __se_sys_clone kernel/fork.c:2780 [inline]
 __x64_sys_clone+0x19a/0x210 kernel/fork.c:2780
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fd8893fd629
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd887656fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007fd889676fa0 RCX: 00007fd8893fd629
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000004b200000
RBP: 00007fd889493b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007fd889677038 R14: 00007fd889676fa0 R15: 00007ffc304082d8
 </TASK>