rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (17 ticks this GP) idle=605/1/0x4000000000000002 softirq=70938/70938 fqs=2101 (detected by 1, t=10502 jiffies, g=90733, q=2252) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 23656 Comm: syz.3.6837 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:perf_tp_event_match kernel/events/core.c:10005 [inline] RIP: 0010:perf_tp_event+0x20c/0xbe0 kernel/events/core.c:10056 Code: c1 ec 03 4d 8d bd d8 01 00 00 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 0f 85 d2 01 00 00 45 8b 3f <44> 89 fe 83 e6 01 31 ff e8 b7 95 e0 ff 41 83 e7 01 75 44 4d 8d bd RSP: 0018:ffffc90000007640 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffff8880b9035250 RCX: dffffc0000000000 RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000002 RBP: ffffc900000078c8 R08: ffff8880213c5947 R09: 1ffff11004278b28 R10: dffffc0000000000 R11: ffffed1004278b29 R12: 1ffff11017206a4a R13: ffff88803f240bf0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f6d7b0cb6c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fefe712d567 CR3: 000000008ce06000 CR4: 00000000003506f0 DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: perf_trace_run_bpf_submit+0xf3/0x1c0 kernel/events/core.c:10031 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 0f 9d 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: 4d05674f96a56100 RBX: 1ffff92000000f64 RCX: 4d05674f96a56100 RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a7a4540 RBP: ffffc90000007bd8 R08: ffff8880b903b30b R09: 1ffff11017207661 R10: dffffc0000000000 R11: ffffed1017207662 R12: ffffffff8c323400 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+0x4ea/0xb60 kernel/time/hrtimer.c:1749 hrtimer_run_softirq+0x176/0x240 kernel/time/hrtimer.c:1766 handle_softirqs+0x336/0x830 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:finish_lock_switch+0x12f/0x290 kernel/sched/core.c:4804 Code: 83 c7 18 be ff ff ff ff e8 0e 1b 6c 08 85 c0 74 46 4d 85 ff 75 62 0f 1f 44 00 00 48 89 df e8 c8 8a 75 08 e8 f3 df 2a 00 fb 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 48 89 df e8 2f 0e fe ff 43 80 3c 2c RSP: 0018:ffffc9000321f778 EFLAGS: 00000282 RAX: 4d05674f96a56100 RBX: ffff88804eb6bb80 RCX: 4d05674f96a56100 RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a7a4540 RBP: 1ffff11017207613 R08: ffff8880b903b30b R09: 1ffff11017207661 R10: dffffc0000000000 R11: ffffed1017207662 R12: 1ffff110172075c1 R13: dffffc0000000000 R14: ffff8880b903ae08 R15: 0000000000000000 finish_task_switch+0x12f/0x650 kernel/sched/core.c:4921 context_switch kernel/sched/core.c:5052 [inline] __schedule+0x11cb/0x4350 kernel/sched/core.c:6395 preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:6571 preempt_schedule+0xbc/0xd0 kernel/sched/core.c:6596 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:34 try_to_wake_up+0x6cc/0x1020 kernel/sched/core.c:4171 wake_up_process kernel/sched/core.c:4234 [inline] wake_up_q+0x78/0xc0 kernel/sched/core.c:953 futex_wake+0x4a9/0x540 kernel/futex/core.c:1702 do_futex+0xd83/0x12b0 kernel/futex/core.c:4023 __do_sys_futex kernel/futex/core.c:4095 [inline] __se_sys_futex+0x389/0x420 kernel/futex/core.c:4076 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: 0033:0x7f6d7ce73159 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:00007f6d7b0cb0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: ffffffffffffffda RBX: 00007f6d7d0fafa8 RCX: 00007f6d7ce73159 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f6d7d0fafac RBP: 00007f6d7d0fafa0 R08: 00158362cbf25cb4 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6d7d0fb038 R14: 00007fff4593b170 R15: 00007fff4593b258