rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (3 ticks this GP) idle=b9d/1/0x4000000000000002 softirq=6959/6959 fqs=0 
	(detected by 1, t=10502 jiffies, g=6633, q=2170)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4513 Comm: syz.1.73 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__perf_event_output kernel/events/core.c:7802 [inline]
RIP: 0010:perf_event_output_forward+0x180/0x2e0 kernel/events/core.c:7822
Code: c0 32 8a e8 22 18 19 08 48 89 5c 24 10 ba 38 00 00 00 4c 89 e7 31 f6 e8 4e 26 26 00 4c 89 f7 4c 89 fe 48 89 da 48 8b 4c 24 18 <e8> 7b dd ff ff 0f b7 8c 24 a6 00 00 00 4c 89 e7 4c 89 fe 48 89 da
RSP: 0018:ffffc90000007460 EFLAGS: 00000002
RAX: ffffc900000074a0 RBX: ffff888024be91e8 RCX: ffff8880b90351c8
RDX: ffff888024be91e8 RSI: ffffc900000076c0 RDI: ffffc90000007500
RBP: ffffc90000007578 R08: ffffc900000074d7 R09: ffffc900000074a0
R10: dffffc0000000000 R11: fffff52000000e9b R12: ffffc900000074a0
R13: 1ffff92000000e90 R14: ffffc90000007500 R15: ffffc900000076c0
FS:  00007fe37f5276c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f615d0a0000 CR3: 0000000028bd3000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __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 c2 ef 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: 0b62f87e82646800 RBX: 1ffff92000000f64 RCX: 0b62f87e82646800
RDX: dffffc0000000000 RSI: ffffffff8a2b2780 RDI: ffffffff8a79f780
RBP: ffffc90000007bd8 R08: ffffffff901d10ff R09: 1ffffffff203a21f
R10: dffffc0000000000 R11: fffffbfff203a220 R12: ffffffff8c322f00
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+0x4eb/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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:perf_trace_init+0x92/0x2d0 kernel/trace/trace_event_perf.c:223
Code: 3d 00 48 8b 1d 1f df b5 0a 48 81 fb c0 c1 36 8c 0f 84 75 01 00 00 4c 89 24 24 4c 8d 63 40 4c 89 e0 48 c1 e8 03 42 0f b6 04 30 <84> c0 0f 85 17 01 00 00 4d 63 24 24 4c 89 ff 4c 89 e6 e8 a7 3e f8
RSP: 0018:ffffc9000342fc08 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: ffffffff8d238b60 RCX: ffff888026dc1dc0
RDX: 0000000000000000 RSI: 0000000000000a52 RDI: 0000000000000116
RBP: 0000000000000002 R08: ffffffff8c36c10b R09: 1ffffffff186d821
R10: dffffc0000000000 R11: fffffbfff186d822 R12: ffffffff8d238ba0
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000116
 perf_tp_event_init+0x89/0x110 kernel/events/core.c:10102
 perf_try_init_event+0x12b/0x3d0 kernel/events/core.c:11601
 perf_init_event kernel/events/core.c:11665 [inline]
 perf_event_alloc+0xfcf/0x2240 kernel/events/core.c:11957
 __do_sys_perf_event_open kernel/events/core.c:12495 [inline]
 __se_sys_perf_event_open+0x5de/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: 0033:0x7fe3812cbeb9
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:00007fe37f527028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fe381546fa0 RCX: 00007fe3812cbeb9
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 00002000000003c0
RBP: 00007fe381339c1f R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe381547038 R14: 00007fe381546fa0 R15: 00007ffe68313be8
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10501 jiffies! g6633 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=3687
rcu: rcu_preempt kthread starved for 10502 jiffies! g6633 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:27536 pid:   15 ppid:     2 flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5049 [inline]
 __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
 schedule+0x11b/0x1e0 kernel/sched/core.c:6478
 schedule_timeout+0x184/0x2d0 kernel/time/timer.c:1914
 rcu_gp_fqs_loop+0x2be/0x11d0 kernel/rcu/tree.c:1972
 rcu_gp_kthread+0x9b/0x370 kernel/rcu/tree.c:2145
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4513 Comm: syz.1.73 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:perf_prepare_sample+0x12e9/0x1cd0 kernel/events/core.c:7753
Code: 00 49 89 1e 4c 8b 74 24 20 4c 89 f6 48 81 e6 00 00 80 00 31 ff e8 f7 33 e1 ff 4c 89 f0 48 25 00 00 80 00 75 07 e8 07 30 e1 ff <eb> 4d e8 00 30 e1 ff 49 8d 7f 40 48 89 f8 48 c1 e8 03 42 80 3c 20
RSP: 0018:ffffc90000007360 EFLAGS: 00000046
RAX: ffffffff8197ef99 RBX: ffffc90000007500 RCX: ffff888026dc1dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000007450 R08: ffffc900000074d7 R09: ffffc900000074a0
R10: dffffc0000000000 R11: fffff52000000e9b R12: dffffc0000000000
R13: ffffc90000007506 R14: 0000000000000000 R15: ffffc900000076c0
FS:  00007fe37f5276c0(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f615d0a0000 CR3: 0000000028bd3000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __perf_event_output kernel/events/core.c:7802 [inline]
 perf_event_output_forward+0x185/0x2e0 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 c2 ef 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: 0b62f87e82646800 RBX: 1ffff92000000f64 RCX: 0b62f87e82646800
RDX: dffffc0000000000 RSI: ffffffff8a2b2780 RDI: ffffffff8a79f780
RBP: ffffc90000007bd8 R08: ffffffff901d10ff R09: 1ffffffff203a21f
R10: dffffc0000000000 R11: fffffbfff203a220 R12: ffffffff8c322f00
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+0x4eb/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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676
RIP: 0010:perf_trace_init+0x92/0x2d0 kernel/trace/trace_event_perf.c:223
Code: 3d 00 48 8b 1d 1f df b5 0a 48 81 fb c0 c1 36 8c 0f 84 75 01 00 00 4c 89 24 24 4c 8d 63 40 4c 89 e0 48 c1 e8 03 42 0f b6 04 30 <84> c0 0f 85 17 01 00 00 4d 63 24 24 4c 89 ff 4c 89 e6 e8 a7 3e f8
RSP: 0018:ffffc9000342fc08 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: ffffffff8d238b60 RCX: ffff888026dc1dc0
RDX: 0000000000000000 RSI: 0000000000000a52 RDI: 0000000000000116
RBP: 0000000000000002 R08: ffffffff8c36c10b R09: 1ffffffff186d821
R10: dffffc0000000000 R11: fffffbfff186d822 R12: ffffffff8d238ba0
R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000116
 perf_tp_event_init+0x89/0x110 kernel/events/core.c:10102
 perf_try_init_event+0x12b/0x3d0 kernel/events/core.c:11601
 perf_init_event kernel/events/core.c:11665 [inline]
 perf_event_alloc+0xfcf/0x2240 kernel/events/core.c:11957
 __do_sys_perf_event_open kernel/events/core.c:12495 [inline]
 __se_sys_perf_event_open+0x5de/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: 0033:0x7fe3812cbeb9
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:00007fe37f527028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fe381546fa0 RCX: 00007fe3812cbeb9
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 00002000000003c0
RBP: 00007fe381339c1f R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe381547038 R14: 00007fe381546fa0 R15: 00007ffe68313be8
 </TASK>