rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 0-.... } 2687 jiffies s: 38305 root: 0x1/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5818 Comm: syz.3.512 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:asm_sysvec_irq_work+0x0/0x20 arch/x86/include/asm/idtentry.h:722 Code: e9 b5 03 00 00 90 90 90 90 90 0f 01 ca fc 6a ff e8 b5 02 00 00 48 89 c4 48 89 e7 e8 7a a5 ea ff e9 95 03 00 00 90 90 90 90 90 <0f> 01 ca fc 6a ff e8 95 02 00 00 48 89 c4 48 89 e7 e8 4a aa ea ff RSP: 0018:ffffc90000007ab8 EFLAGS: 00000006 RAX: d2aeeace45aa1700 RBX: 1ffff92000000f64 RCX: d2aeeace45aa1700 RDX: dffffc0000000000 RSI: ffffffff8a8c17a0 RDI: ffffffff8adee1a0 RBP: ffffc90000007bd0 R08: ffffffff90af2247 R09: 1ffffffff215e448 R10: dffffc0000000000 R11: fffffbfff215e449 R12: 0000000000000246 R13: dffffc0000000000 R14: ffff8880b8e3bb00 R15: 0000000000000001 FS: 00007f850d0db6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f890e7ee9f4 CR3: 000000007ec76000 CR4: 00000000003506f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: RIP: 0010:rcu_read_unlock_special+0x7f/0x510 kernel/rcu/tree_plugin.h:685 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 82 95 7e 41 f7 c6 00 00 f0 00 74 40 <48> c7 44 24 40 0e 36 e0 45 4a c7 04 2b 00 00 00 00 42 c7 44 2b 08 RSP: 0018:ffffc90000007ae0 EFLAGS: 00000206 __rcu_read_unlock+0x78/0xd0 kernel/rcu/tree_plugin.h:426 rcu_read_unlock include/linux/rcupdate.h:823 [inline] ieee80211_iterate_active_interfaces_atomic+0x156/0x170 net/mac80211/util.c:826 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 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691 RIP: 0010:spin_unlock include/linux/spinlock.h:391 [inline] RIP: 0010:__text_poke+0x6ac/0x840 arch/x86/kernel/alternative.c:1456 Code: 84 24 80 00 00 00 f7 84 24 80 00 00 00 00 02 00 00 c6 44 03 04 f8 75 75 41 f7 c6 00 02 00 00 74 01 fb 48 8b bc 24 c0 00 00 00 7f 5a 06 09 48 b8 00 00 00 00 00 fc ff df c6 44 03 0c f8 48 c7 RSP: 0018:ffffc9000e8a7aa0 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff92001d14f60 RCX: d2aeeace45aa1700 RDX: dffffc0000000000 RSI: ffffffff8a8c17a0 RDI: ffff888017466060 RBP: ffffc9000e8a7bd0 R08: ffffffff90af2247 R09: 1ffffffff215e448 R10: dffffc0000000000 R11: fffffbfff215e449 R12: 00002aaaaaaac000 R13: ffff88802e949e00 R14: 0000000000000282 R15: ffffffff857fec9d text_poke arch/x86/kernel/alternative.c:1480 [inline] text_poke_bp_batch+0x6b5/0x850 arch/x86/kernel/alternative.c:1852 text_poke_flush arch/x86/kernel/alternative.c:1965 [inline] text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1972 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146 static_key_slow_inc_cpuslocked+0x7c/0xe0 kernel/jump_label.c:165 static_key_slow_inc+0x16/0x30 kernel/jump_label.c:188 bpf_enable_runtime_stats kernel/bpf/syscall.c:4866 [inline] bpf_enable_stats+0x101/0x140 kernel/bpf/syscall.c:4885 __sys_bpf+0x667/0x780 kernel/bpf/syscall.c:5114 __do_sys_bpf kernel/bpf/syscall.c:5135 [inline] __se_sys_bpf kernel/bpf/syscall.c:5133 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:5133 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: 0033:0x7f850c19ce59 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:00007f850d0db028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f850c415fa0 RCX: 00007f850c19ce59 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000020 RBP: 00007f850c232e6f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f850c416038 R14: 00007f850c415fa0 R15: 00007ffd64433c58