rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=134645, q=265 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4295019504-4295009002), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g134645 f0x2 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:27504 pid:17    tgid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5328 [inline]
 __schedule+0xe55/0x5740 kernel/sched/core.c:6690
 __schedule_loop kernel/sched/core.c:6767 [inline]
 schedule+0xe7/0x350 kernel/sched/core.c:6782
 schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2615
 rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:2045
 rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:2247
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </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 UID: 0 PID: 8 Comm: kworker/0:0 Not tainted 6.12.0-rc5-syzkaller-00322-gb9021de3ec2f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_freezable_pwr_efficient sync_hw_clock
RIP: 0010:debug_object_activate+0x78/0x540 lib/debugobjects.c:695
Code: ff ff ff 37 0a 99 8d 49 8d 04 1e 48 c7 85 40 ff ff ff 00 ef 95 84 c7 00 f1 f1 f1 f1 c7 40 04 f1 f1 00 00 c7 40 08 00 00 00 f3 <c7> 40 0c f3 f3 f3 f3 8b 0d 63 9d c9 0b 65 48 8b 04 25 28 00 00 00
RSP: 0018:ffffc90000007cf0 EFLAGS: 00000086
RAX: fffff52000000fa2 RBX: dffffc0000000000 RCX: ffffffff817ab4f6
RDX: ffff88801c6a2440 RSI: ffffffff8b6f8740 RDI: ffff8880545e0340
RBP: ffffc90000007de0 R08: 0000000000000001 R09: 0000000000000000
R10: ffffc90000007d10 R11: 0000000000000000 R12: ffff8880545e0340
R13: ffff8880b862cac0 R14: 1ffff92000000fa2 R15: ffffffff89324af0
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f89d4ccdf98 CR3: 000000007a8e0000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 debug_hrtimer_activate kernel/time/hrtimer.c:423 [inline]
 debug_activate kernel/time/hrtimer.c:478 [inline]
 enqueue_hrtimer+0x25/0x3c0 kernel/time/hrtimer.c:1085
 __run_hrtimer kernel/time/hrtimer.c:1708 [inline]
 __hrtimer_run_queues+0x903/0xae0 kernel/time/hrtimer.c:1755
 hrtimer_interrupt+0x31b/0x800 kernel/time/hrtimer.c:1817
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1038 [inline]
 __sysvec_apic_timer_interrupt+0x10f/0x400 arch/x86/kernel/apic/apic.c:1055
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 f6 d1 44 f6 48 89 df e8 0e 4f 45 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 <bf> 01 00 00 00 e8 35 58 36 f6 65 8b 05 e6 11 de 74 85 c0 74 16 5b
RSP: 0018:ffffc900000d7af8 EFLAGS: 00000246
RAX: 0000000000000002 RBX: ffffffff8dfc1200 RCX: 1ffffffff2dcb9d8
RDX: 0000000000000000 RSI: ffffffff8b6cd040 RDI: ffffffff8bd1b2c0
RBP: 0000000000000206 R08: 0000000000000001 R09: fffffbfff2dc5b97
R10: ffffffff96e2dcbf R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000004 R14: 0000000000000074 R15: 0000000000000000
 spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
 mc146818_set_time+0x477/0x5c0 drivers/rtc/rtc-mc146818-lib.c:307
 rtc_set_time drivers/rtc/interface.c:158 [inline]
 rtc_set_time+0x1d1/0x5c0 drivers/rtc/interface.c:126
 update_rtc kernel/time/ntp.c:597 [inline]
 sync_hw_clock+0x4a4/0x520 kernel/time/ntp.c:656
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
vkms_vblank_simulate: vblank timer overrun
hrtimer: interrupt took 668520763 ns
vkms_vblank_simulate: vblank timer overrun