rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (1 GPs behind) idle=d01/1/0x4000000000000002 softirq=25188/25189 fqs=2119 (detected by 1, t=10503 jiffies, g=34081, q=1200) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 9697 Comm: syz.0.1334 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:__lock_release kernel/locking/lockdep.c:5279 [inline] RIP: 0010:lock_release+0x164/0x8a0 kernel/locking/lockdep.c:5643 Code: 00 00 00 4c 8b bc 24 a0 00 00 00 4c 89 64 24 50 43 c6 44 2c 08 f8 fa 48 c7 c7 80 3f 2b 8a e8 83 e2 5f 08 65 ff 05 6c d0 a4 7e 44 24 5c 01 00 00 00 48 c7 c0 84 3a 8a 8d 48 c1 e8 03 42 0f b6 RSP: 0018:ffffc90000007340 EFLAGS: 00000002 RAX: 0000000000000000 RBX: ffff8880189e3b80 RCX: dc19ab29b6a68b00 RDX: 0000000000000000 RSI: ffffffff8a2b3f80 RDI: ffffffff8a7a09c0 RBP: ffffc90000007450 R08: ffffffff8d8a06ef R09: 1ffffffff1b140dd R10: dffffc0000000000 R11: fffffbfff1b140de R12: 1ffff92000000e74 R13: dffffc0000000000 R14: ffff8880189e466c R15: 0000000000000046 FS: 00007f8185f4e6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055d58af506c0 CR3: 000000002ee38000 CR4: 00000000003506f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_read_unlock include/linux/rcupdate.h:773 [inline] __perf_event_output kernel/events/core.c:7813 [inline] perf_event_output_forward+0x261/0x2e0 kernel/events/core.c:7822 __perf_event_overflow+0x364/0x530 kernel/events/core.c:9515 perf_swevent_overflow kernel/events/core.c:9591 [inline] perf_swevent_event+0x4ad/0x530 kernel/events/core.c:9629 perf_tp_event+0x383/0xbf0 kernel/events/core.c:10047 perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10021 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 f2 cc 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: dc19ab29b6a68b00 RBX: 1ffff92000000f64 RCX: dc19ab29b6a68b00 RDX: dffffc0000000000 RSI: ffffffff8a2b3180 RDI: ffffffff8a7a09c0 RBP: ffffc90000007bd8 R08: ffffffff901d81cf R09: 1ffffffff203b039 R10: dffffc0000000000 R11: fffffbfff203b03a R12: ffffffff8c323800 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+0x4f2/0xb70 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 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:generic_exec_single+0x373/0x460 kernel/smp.c:532 Code: df eb 27 e8 2f 6f 0b 00 0f 0b e9 b6 fd ff ff e8 23 6f 0b 00 e8 5e a0 4f 08 48 85 db 0f 84 5c ff ff ff e8 10 6f 0b 00 fb 31 c0 <48> c7 44 24 20 0e 36 e0 45 4b c7 44 3d 00 00 00 00 00 43 c7 44 3d RSP: 0018:ffffc900033cfa60 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffff8880189e3b80 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900033cfb30 R08: ffffffff901d81cf R09: 1ffffffff203b039 R10: dffffc0000000000 R11: fffffbfff203b03a R12: ffffc900033cfb88 R13: 1ffff92000679f50 R14: 0000000000000000 R15: dffffc0000000000 smp_call_function_single+0x202/0x4c0 kernel/smp.c:755 task_function_call kernel/events/core.c:120 [inline] perf_install_in_context+0x5c7/0x920 kernel/events/core.c:3016 __do_sys_perf_event_open kernel/events/core.c:12793 [inline] __se_sys_perf_event_open+0x12b3/0x1bb0 kernel/events/core.c:12387 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: 0033:0x7f8187cf4e59 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:00007f8185f4e028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f8187f6dfa0 RCX: 00007f8187cf4e59 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000540 RBP: 00007f8187d8ad6f R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8187f6e038 R14: 00007f8187f6dfa0 R15: 00007fff3f1b0f28