rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-...!: (1 GPs behind) idle=dd3c/1/0x4000000000000000 softirq=42418/42419 fqs=361
	(t=10502 jiffies g=57341 q=241 ncpus=2)
rcu: rcu_preempt kthread starved for 9781 jiffies! g57341 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:R  running task     stack:26712 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x143f/0x4570 kernel/sched/core.c:6561
 schedule+0xbf/0x180 kernel/sched/core.c:6637
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1965
 rcu_gp_fqs_loop+0x2d2/0x1150 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xa3/0x3b0 kernel/rcu/tree.c:1905
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.1.132-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:arch_scale_freq_tick+0x1a/0x380 arch/x86/kernel/cpu/aperfmperf.c:384
Code: 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 41 57 41 56 41 55 41 54 53 48 83 ec 20 e8 ad bf 55 00 e8 f8 c1 7c 09 89 c5 <89> c3 bf 08 00 00 00 89 c6 e8 f8 c2 55 00 83 fd 07 0f 87 df 02 00
RSP: 0018:ffffc900001e0c38 EFLAGS: 00000082
RAX: 0000000000000001 RBX: ffff8880b8f00000 RCX: ffff888017fb1dc0
RDX: 0000000000010000 RSI: ffffffff8b5f70c0 RDI: ffffffff8b5f7080
RBP: 0000000000000001 R08: ffffffff819791b2 R09: fffffbfff1d416c6
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880b8f29450
R13: ffff8880b8f2ae0c R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000140 CR3: 0000000024de5000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000c DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 scheduler_tick+0x61/0x620 kernel/sched/core.c:5508
 update_process_times+0x17b/0x1b0 kernel/time/timer.c:1874
 tick_sched_handle kernel/time/tick-sched.c:254 [inline]
 tick_sched_timer+0x386/0x550 kernel/time/tick-sched.c:1501
 __run_hrtimer kernel/time/hrtimer.c:1691 [inline]
 __hrtimer_run_queues+0x5a7/0xe50 kernel/time/hrtimer.c:1755
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1817
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1107 [inline]
 __sysvec_apic_timer_interrupt+0x158/0x5b0 arch/x86/kernel/apic/apic.c:1124
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0x9b/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:22 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:arch_irqs_disabled arch/x86/include/asm/irqflags.h:130 [inline]
RIP: 0010:acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline]
RIP: 0010:acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:567
Code: a8 ce f6 48 83 e3 08 0f 85 0b 01 00 00 4c 8d 74 24 20 e8 44 65 d5 f6 0f 1f 44 00 00 e8 6a a4 ce f6 0f 00 2d f3 b5 ad 00 fb f4 <4c> 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 0b 06 26 f7
RSP: 0018:ffffc90000177b80 EFLAGS: 000002d3
RAX: ffffffff8abc05e6 RBX: 0000000000000000 RCX: ffff888017fb1dc0
RDX: 0000000000000000 RSI: ffffffff8b0c1dc0 RDI: ffffffff8b5f70e0
RBP: ffffc90000177c10 R08: ffffffff8abc05c8 R09: ffffed1002ff63b9
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200002ef70
R13: ffff888140b82804 R14: ffffc90000177ba0 R15: dffffc0000000000
 acpi_idle_enter+0x352/0x4f0 drivers/acpi/processor_idle.c:704
 cpuidle_enter_state+0x516/0xf80 drivers/cpuidle/cpuidle.c:239
 cpuidle_enter+0x59/0x90 drivers/cpuidle/cpuidle.c:356
 call_cpuidle kernel/sched/idle.c:155 [inline]
 cpuidle_idle_call kernel/sched/idle.c:236 [inline]
 do_idle+0x3ce/0x680 kernel/sched/idle.c:303
 cpu_startup_entry+0x3d/0x60 kernel/sched/idle.c:401
 start_secondary+0xe4/0xf0 arch/x86/kernel/smpboot.c:281
 secondary_startup_64_no_verify+0xcf/0xdb
 </TASK>
CPU: 0 PID: 10773 Comm: syz.1.1861 Not tainted 6.1.132-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:202
Code: f1 84 f5 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 7e cb ae f6 48 89 df e8 e6 09 b0 f6 e8 a1 5b d5 f6 fb bf 01 00 00 00 <e8> f6 89 a2 f6 65 8b 05 b7 5f 46 75 85 c0 74 02 5b c3 e8 54 83 44
RSP: 0018:ffffc90003557b30 EFLAGS: 00000286
RAX: b81ea43cadc61500 RBX: ffff8880785bae40 RCX: ffffffff973c2103
RDX: dffffc0000000000 RSI: ffffffff8b0c1dc0 RDI: 0000000000000001
RBP: ffffc90003557c70 R08: dffffc0000000000 R09: ffffed100f0b75c9
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100f0b765b
R13: 000000001c000004 R14: 0000000000000021 R15: ffff8880785bb2d8
FS:  00007f9d342996c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000006b000 CR3: 00000000432f1000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x151f/0x17a0 kernel/signal.c:2874
 arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:303
 do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f9d3338d167
Code: ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89
RSP: 002b:00007f9d342990e8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f9d335a5fa8 RCX: 00007f9d3338d169
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f9d335a5fa8
RBP: 00007f9d335a5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9d335a5fac
R13: 0000000000000000 R14: 00007ffc5158e6e0 R15: 00007ffc5158e7c8
 </TASK>