rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-.... } 2645 jiffies s: 957 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4369 Comm: syz.1.7 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:207 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:147 [inline]
RIP: 0010:wrmsr arch/x86/include/asm/msr.h:254 [inline]
RIP: 0010:native_apic_msr_write+0x35/0x50 arch/x86/include/asm/apic.h:206
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 89 f6 31 d2 e9 5f af 05 03 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc900001e03e8 EFLAGS: 00000046
RAX: 0000000000000084 RBX: 0000000000000084 RCX: 0000000000000838
RDX: 0000000000000000 RSI: 0000000000000084 RDI: 0000000000000838
RBP: 0000000000000000 R08: ffffffff8e2121af R09: 1ffffffff1c42435
R10: dffffc0000000000 R11: fffffbfff1c42436 R12: dffffc0000000000
R13: 0000000010000f19 R14: ffffffff8c65fb40 R15: dffffc0000000000
FS:  00007f18cabda6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000080 CR3: 0000000026295000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 apic_write arch/x86/include/asm/apic.h:394 [inline]
 lapic_next_event+0x5b/0x70 arch/x86/kernel/apic/apic.c:478
 clockevents_program_event+0x1bc/0x310 kernel/time/clockevents.c:334
 hrtimer_interrupt+0x561/0x980 kernel/time/hrtimer.c:1890
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x153/0x5a0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1118
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:unwind_next_frame+0x682/0x1fd0 arch/x86/kernel/unwind_orc.c:-1
Code: e8 03 0f b6 04 28 84 c0 74 65 44 89 f1 80 e1 07 38 c1 7c 5b be 02 00 00 00 48 89 14 24 4c 89 f7 e8 33 47 9a 00 e9 09 15 00 00 <48> 8b 44 24 40 80 3c 28 00 4c 8d 73 38 74 08 4c 89 f7 e8 57 46 9a
RSP: 0018:ffffc900001e0640 EFLAGS: 00000297
RAX: 0000000000000015 RBX: ffffc900001e06e8 RCX: ffffffff8e81f5a8
RDX: ffffffff8f1a4fb6 RSI: ffffffff8e81f5a4 RDI: 0000000000000001
RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000019
R10: dffffc0000000000 R11: fffff5200003c0e9 R12: ffffffff8f1a4fb6
R13: ffffffff8f1a4fba R14: 0000000000000005 R15: 1ffffffff1e349f7
 arch_stack_walk+0x10c/0x140 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0xa6/0xf0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x126/0x1f0 mm/kasan/common.c:237
 kasan_slab_free include/linux/kasan.h:177 [inline]
 slab_free_hook mm/slub.c:1729 [inline]
 slab_free_freelist_hook+0x133/0x1b0 mm/slub.c:1755
 slab_free mm/slub.c:3687 [inline]
 kmem_cache_free+0xf7/0x2a0 mm/slub.c:3709
 mac80211_hwsim_beacon_tx+0x608/0xae0 drivers/net/wireless/mac80211_hwsim.c:2121
 __iterate_interfaces+0x225/0x4c0 net/mac80211/util.c:788
 ieee80211_iterate_active_interfaces_atomic+0xd7/0x170 net/mac80211/util.c:824
 mac80211_hwsim_beacon+0xb7/0x1b0 drivers/net/wireless/mac80211_hwsim.c:2147
 __run_hrtimer kernel/time/hrtimer.c:1751 [inline]
 __hrtimer_run_queues+0x522/0xc90 kernel/time/hrtimer.c:1815
 hrtimer_run_softirq+0x173/0x290 kernel/time/hrtimer.c:1832
 handle_softirqs+0x291/0x910 kernel/softirq.c:596
 __do_softirq kernel/softirq.c:630 [inline]
 invoke_softirq kernel/softirq.c:470 [inline]
 __irq_exit_rcu+0x13b/0x230 kernel/softirq.c:679
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:preempt_schedule_irq+0xb6/0x160 kernel/sched/core.c:6874
Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 7f bf 01 00 00 00 e8 b5 cf 1f f7 e8 b0 99 4f f7 fb bf 01 00 00 00 <e8> 25 ba ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc9000475eee0 EFLAGS: 00000282
RAX: e4ce1b296745d400 RBX: 0000000000000000 RCX: e4ce1b296745d400
RDX: dffffc0000000000 RSI: ffffffff8a8c17a0 RDI: 0000000000000001
RBP: ffffc9000475ef90 R08: ffffffff90b10267 R09: 1ffffffff216204c
R10: dffffc0000000000 R11: fffffbfff216204d R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff920008ebddc
 irqentry_exit+0x63/0x70 kernel/entry/common.c:439
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:check_kcov_mode kernel/kcov.c:184 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x2c/0x80 kernel/kcov.c:320
Code: 04 24 65 48 8b 0d b4 49 80 7e 65 8b 15 b5 49 80 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 57 83 b9 1c 16 00 00 00 74 4e <8b> 91 f8 15 00 00 83 fa 03 75 43 48 8b 91 00 16 00 00 44 8b 89 fc
RSP: 0018:ffffc9000475f058 EFLAGS: 00000246
RAX: ffffffff8a2172c6 RBX: 0000000000000034 RCX: ffff88802a998000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000018
RBP: ffffc9000475f180 R08: ffffc9000475f0f7 R09: ffffc9000475f0e0
R10: dffffc0000000000 R11: fffff520008ebe1f R12: ffff8880192ea27d
R13: dffffc0000000000 R14: ffff8880192ea27d R15: 0000000000000000
 number+0xb26/0xef0 lib/vsprintf.c:561
 vsnprintf+0x12d3/0x1c20 lib/vsprintf.c:2871
 add_uevent_var+0x1cd/0x460 lib/kobject_uevent.c:680
 kobject_uevent_env+0x518/0x890 lib/kobject_uevent.c:603
 device_add+0xac2/0x1050 drivers/base/core.c:3678
 netdev_register_kobject+0x184/0x320 net/core/net-sysfs.c:2013
 register_netdevice+0x133a/0x1b80 net/core/dev.c:10243
 __ip_tunnel_create+0x346/0x450 net/ipv4/ip_tunnel.c:267
 ip_tunnel_init_net+0x2ac/0x7a0 net/ipv4/ip_tunnel.c:1104
 ops_init+0x360/0x5e0 net/core/net_namespace.c:138
 setup_net+0x4f2/0xbd0 net/core/net_namespace.c:336
 copy_net_ns+0x33e/0x5b0 net/core/net_namespace.c:508
 create_new_namespaces+0x3ce/0x700 kernel/nsproxy.c:110
 copy_namespaces+0x3ae/0x410 kernel/nsproxy.c:178
 copy_process+0x19ef/0x40c0 kernel/fork.c:2360
 kernel_clone+0x24b/0x900 kernel/fork.c:2764
 __do_sys_clone kernel/fork.c:2905 [inline]
 __se_sys_clone kernel/fork.c:2889 [inline]
 __x64_sys_clone+0x1a7/0x220 kernel/fork.c:2889
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f18c9d9de59
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:00007f18cabd9fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f18ca025fa0 RCX: 00007f18c9d9de59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000640c7000
RBP: 00007f18c9e33e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 00007f18ca026038 R14: 00007f18ca025fa0 R15: 00007ffed7c07cc8
 </TASK>