rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: 0-....: (0 ticks this GP) idle=3df/1/0x4000000000000002 softirq=42848/42848 fqs=2099 (detected by 1, t=10502 jiffies, g=48385, q=1224) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 23718 Comm: syz.2.9399 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 RIP: 0010:hlock_class kernel/locking/lockdep.c:197 [inline] RIP: 0010:mark_lock+0x9c/0x320 kernel/locking/lockdep.c:4569 Code: 89 c7 41 81 e7 ff 1f 00 00 c1 e8 03 25 f8 03 00 00 48 8d b8 c0 10 1f 90 be 08 00 00 00 e8 1c a6 60 00 4c 0f a3 3d e4 6c c1 0e <73> 10 4b 8d 04 7f c1 e0 06 4c 8d b8 80 8f b7 8f eb 24 48 c7 c0 80 RSP: 0018:ffffc90000006d40 EFLAGS: 00000057 RAX: 0000000000000001 RBX: ffff8880570b3b80 RCX: ffffffff815da3d4 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff901f10c0 RBP: 0000000000000009 R08: ffffffff901f10c7 R09: 1ffffffff203e218 R10: dffffc0000000000 R11: fffffbfff203e219 R12: 0000000000000200 R13: dffffc0000000000 R14: ffff8880570b46e8 R15: 0000000000000015 FS: 0000555580098500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000006b433 CR3: 000000005aeef000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mark_usage kernel/locking/lockdep.c:4512 [inline] __lock_acquire+0xd7b/0x7b50 kernel/locking/lockdep.c:4966 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5625 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:313 rcu_read_lock include/linux/rcupdate.h:740 [inline] is_bpf_text_address+0x1d/0x270 kernel/bpf/core.c:725 kernel_text_address kernel/extable.c:151 [inline] __kernel_text_address+0x9a/0x100 kernel/extable.c:105 unwind_get_return_address+0x49/0x80 arch/x86/kernel/unwind_orc.c:323 perf_callchain_kernel+0x35a/0x760 arch/x86/events/core.c:2784 get_perf_callchain+0x356/0x460 kernel/events/callchain.c:200 perf_callchain kernel/events/core.c:7616 [inline] perf_prepare_sample+0x352/0x1cb0 kernel/events/core.c:7643 __perf_event_output kernel/events/core.c:7812 [inline] perf_event_output_forward+0x185/0x2e0 kernel/events/core.c:7832 __perf_event_overflow+0x35f/0x550 kernel/events/core.c:9525 perf_tp_event+0x324/0xbe0 kernel/events/core.c:10057 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 42 0b 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: c016229e28594d00 RBX: 1ffff92000000f64 RCX: c016229e28594d00 RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a7a48c0 RBP: ffffc90000007bd8 R08: ffffffff901f10cf R09: 1ffffffff203e219 R10: dffffc0000000000 R11: fffffbfff203e21a 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:raw_spin_rq_unlock_irq+0x13/0x90 kernel/sched/sched.h:1339 Code: 58 0d 00 00 e8 1e ea 69 00 eb ac 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 57 41 56 53 66 90 e8 04 49 76 08 e8 1f e2 2a 00 fb 5b <41> 5e 41 5f c3 49 be 00 00 00 00 00 fc ff df 49 89 ff 48 8d 9f 58 RSP: 0018:ffffc9000305f9c8 EFLAGS: 00000282 RAX: c016229e28594d00 RBX: ffff8880570b3b80 RCX: c016229e28594d00 RDX: dffffc0000000000 RSI: ffffffff8a2b2be0 RDI: ffffffff8a7a48c0 RBP: ffffc9000305fbb0 R08: ffffffff901f10cf R09: 1ffffffff203e219 R10: dffffc0000000000 R11: fffffbfff203e21a R12: dffffc0000000000 R13: 1ffff110172075ab R14: ffff8880b903a340 R15: ffff8880570b3b80 __schedule+0x1465/0x4350 kernel/sched/core.c:6401 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 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] _raw_spin_unlock_irq+0x3c/0x40 kernel/locking/spinlock.c:202 perf_remove_from_context+0x10c/0x250 kernel/events/core.c:2524 perf_event_release_kernel+0x1bf/0x850 kernel/events/core.c:5309 perf_release+0x37/0x40 kernel/events/core.c:5403 __fput+0x212/0x8c0 fs/file_table.c:311 task_work_run+0x125/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:184 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:217 __syscall_exit_to_user_mode_work kernel/entry/common.c:299 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:310 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7ff1fe496159 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:00007fffd0b723e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fffd0b724d0 RCX: 00007ff1fe496159 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 000000000006b433 R08: 0000000000000001 R09: 0000000000000000 R10: 0000001b33a20000 R11: 0000000000000246 R12: 00007fffd0b72510 R13: 00007ff1fe71dfac R14: 000000000006b467 R15: 00007ff1fe71dfa0