rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=7f0c/0/0x1 softirq=92038/92038 fqs=0
	(t=10500 jiffies g=125045 q=28 ncpus=2)
rcu: rcu_preempt kthread starved for 10500 jiffies! g125045 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:25016 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5243 [inline]
 __schedule+0x143f/0x4570 kernel/sched/core.c:6560
 schedule+0xbf/0x180 kernel/sched/core.c:6636
 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2221 Comm: syz.1.2794 Not tainted 6.1.131-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:mark_lock+0x3/0x340 kernel/locking/lockdep.c:4589
Code: c1 0f 8c 73 ff ff ff 4c 89 ff e8 08 e7 76 00 e9 66 ff ff ff e8 ce 5d 46 09 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 55 41 57 <41> 56 41 55 41 54 53 48 83 ec 10 49 89 f7 48 89 3c 24 49 bd 00 00
RSP: 0018:ffffc90000007a08 EFLAGS: 00000046
RAX: 0000000000000001 RBX: ffff88807dbc2884 RCX: 00000000000c4904
RDX: 0000000000000000 RSI: ffff88807dbc28a0 RDI: ffff88807dbc1dc0
RBP: ffff88807dbc28a0 R08: dffffc0000000000 R09: fffffbfff2257271
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807dbc2898
R13: ffff88807dbc1dc0 R14: ffff88807dbc28c0 R15: 1ffff1100fb78518
FS:  000055555cee4500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000006b000 CR3: 0000000078df1000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 mark_usage kernel/locking/lockdep.c:4520 [inline]
 __lock_acquire+0xb40/0x1f80 kernel/locking/lockdep.c:5003
 lock_acquire+0x1f8/0x5a0 kernel/locking/lockdep.c:5662
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0xd1/0x120 kernel/locking/spinlock.c:162
 posix_timer_fn+0x2f/0x390 kernel/time/posix-timers.c:379
 __run_hrtimer kernel/time/hrtimer.c:1689 [inline]
 __hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1753
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1815
 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:__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: a1 84 f5 ff 90 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 8e dc ae f6 48 89 df e8 f6 1a b0 f6 e8 51 6d d5 f6 fb bf 01 00 00 00 <e8> d6 9b a2 f6 65 8b 05 f7 71 46 75 85 c0 74 02 5b c3 e8 94 95 44
RSP: 0018:ffffc90003cf7b30 EFLAGS: 00000286
RAX: 979568a51fbb6f00 RBX: ffff88807e382500 RCX: ffffffff973c0103
RDX: dffffc0000000000 RSI: ffffffff8b0c1d40 RDI: 0000000000000001
RBP: ffffc90003cf7c70 R08: dffffc0000000000 R09: ffffed100fc704a1
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1100fc70533
R13: 000000001c000004 R14: 0000000000000021 R15: ffff88807e382998
 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: 0033:0x7f8f6798d169
Code: 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 01 48
RSP: 002b:00007ffca8383218 EFLAGS: 00000246
RAX: fffffffffffffffc RBX: 0000000000173f32 RCX: 00007f8f6798d169
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f8f67ba5fac
RBP: 0000000000000032 R08: 0000000000000010 R09: 00000007a838350f
R10: 00007ffca8383310 R11: 0000000000000246 R12: 00007f8f67ba5fac
R13: 00007ffca8383310 R14: 0000000000173f64 R15: 00007ffca8383330
 </TASK>
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.1.131-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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: ba ce f6 48 83 e3 08 0f 85 0b 01 00 00 4c 8d 74 24 20 e8 f4 76 d5 f6 0f 1f 44 00 00 e8 1a b6 ce f6 0f 00 2d 73 c4 ad 00 fb f4 <4c> 89 f3 48 c1 eb 03 42 80 3c 3b 00 74 08 4c 89 f7 e8 bb 17 26 f7
RSP: 0018:ffffc90000177b80 EFLAGS: 000002d3
RAX: ffffffff8abbf3a6 RBX: 0000000000000000 RCX: ffff888018c09dc0
RDX: 0000000000000000 RSI: ffffffff8b0c1d40 RDI: ffffffff8b5f6f80
RBP: ffffc90000177c10 R08: ffffffff8abbf388 R09: ffffed10031813b9
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff9200002ef70
R13: ffff88801fae7004 R14: ffffc90000177ba0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d71eff8 CR3: 0000000028a05000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 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>