rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
	(detected by 0, t=10502 jiffies, g=13553, q=183 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10497 (4294969063-4294958566), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10498 jiffies! g13553 f0x2 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:27200 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5244 [inline]
 __schedule+0x10ec/0x40b0 kernel/sched/core.c:6561
 schedule+0xb9/0x180 kernel/sched/core.c:6637
 schedule_timeout+0x15c/0x280 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x2f2/0x1310 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x95/0x380 kernel/rcu/tree.c:1905
 kthread+0x29d/0x330 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: 4751 Comm: syz.7.33 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:pvclock_read_begin arch/x86/include/asm/pvclock.h:23 [inline]
RIP: 0010:pvclock_clocksource_read+0xcd/0x760 arch/x86/kernel/pvclock.c:75
Code: 8d 4f 1d 48 89 4c 24 30 48 c1 e9 03 48 89 4c 24 58 49 bc 00 00 00 00 00 fc ff df 48 89 54 24 38 4c 89 74 24 28 42 0f b6 04 22 <84> c0 0f 85 45 01 00 00 43 0f b6 04 26 84 c0 0f 85 7f 01 00 00 8b
RSP: 0018:ffffc900001e0d60 EFLAGS: 00000803
RAX: 0000000000000000 RBX: ffffc900001e0e80 RCX: 1ffffffff1efba0b
RDX: 1ffffffff1efba08 RSI: ffffffff8f7dd05c RDI: ffffffff8f7dd040
RBP: ffffc900001e0ef8 R08: ffffffff8f7dd048 R09: ffffffff8f7dd058
R10: ffffffff8f7dd050 R11: ffffffff8f7dd043 R12: dffffc0000000000
R13: dffffc0000000000 R14: 1ffffffff1efba08 R15: ffffffff8c3d8988
FS:  000055556f5ad500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30363fff CR3: 000000007f046000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 kvm_clock_read arch/x86/kernel/kvmclock.c:79 [inline]
 kvm_sched_clock_read+0x14/0x40 arch/x86/kernel/kvmclock.c:91
 sched_clock_cpu+0x6e/0x250 kernel/sched/clock.c:369
 irqtime_account_irq+0x6a/0x1b0 kernel/sched/cputime.c:60
 account_hardirq_exit include/linux/vtime.h:159 [inline]
 __irq_exit_rcu+0x8d/0x220 kernel/softirq.c:676
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:691
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 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: f5 ff 0f 1f 00 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 ae 05 49 f7 48 89 df e8 06 cb 49 f7 e8 d1 bd 6c f7 fb bf 01 00 00 00 <e8> 96 43 3d f7 65 8b 05 27 f1 e7 75 85 c0 74 02 5b c3 e8 c4 02 e6
RSP: 0018:ffffc90003ec7b98 EFLAGS: 00000282
RAX: 325a202c8d240700 RBX: ffff88807d174a00 RCX: 325a202c8d240700
RDX: dffffc0000000000 RSI: ffffffff8a6c0600 RDI: 0000000000000001
RBP: ffff88807d174c98 R08: dffffc0000000000 R09: ffffed100fa2e941
R10: ffffed100fa2e941 R11: 1ffff1100fa2e940 R12: 1ffff1100fa2e993
R13: 0000000000000011 R14: dffffc0000000000 R15: 0000000000000000
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x1163/0x1350 kernel/signal.c:2874
 arch_do_signal_or_restart+0xb7/0x1240 arch/x86/kernel/signal.c:871
 exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa7b0865006
Code: 00 b9 40 42 0f 00 ba 81 00 00 00 c7 05 bb 0f 38 00 01 00 00 00 48 8d 35 b4 0f 38 00 31 c0 e8 31 a7 12 00 48 8d 3d 9a 0f 38 00 <e8> 25 ce ff ff 48 c7 84 24 e4 00 00 00 00 00 00 00 c7 84 24 ec 00
RSP: 002b:00007ffd1049d350 EFLAGS: 00000217
RAX: 0000000000000000 RBX: 00007fa7b0be5fa8 RCX: 00007fa7b098f749
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007fa7b0be5fa0
RBP: 0000000000000000 R08: 0031ed9f8152c20a R09: 000000041049d63f
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa7b0be5fac
R13: 00007fa7b0be5fa0 R14: 0000000000001da6 R15: 0000000000000004
 </TASK>