rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 1, t=10502 jiffies, g=8229, q=52 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294956445-4294945943), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g8229 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:27728 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5258 [inline]
 __schedule+0x150e/0x5070 kernel/sched/core.c:6866
 __schedule_loop kernel/sched/core.c:6948 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6963
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </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: 5861 Comm: syz-executor292 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:ktime_get+0x0/0x200 kernel/time/timekeeping.c:815
Code: 5b 41 5c 41 5d 41 5e 41 5f 5d e9 9b 37 b1 09 cc e8 55 4c ae 09 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 55 41 57 41 56 41 55 41 54 53 e8 ad 53 12 00 8b 1d 73
RSP: 0018:ffffc90000007e58 EFLAGS: 00000046
RAX: ffffffff81b28caa RBX: ffff8880b8623e40 RCX: 0000000000010000
RDX: ffff88802dcf8000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88802dcf8000 R09: 0000000000000002
R10: 0000000000000003 R11: 0000000000010000 R12: 0000000000000003
R13: dffffc0000000000 R14: 0000002d0a84be80 R15: ffff8880b8623e7c
FS:  00007f776afdc6c0(0000) GS:ffff888125c25000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f776afbad58 CR3: 0000000072dc2000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 clockevents_program_event+0xe8/0x350 kernel/time/clockevents.c:326
 hrtimer_interrupt+0x620/0xaa0 kernel/time/hrtimer.c:1916
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline]
 __sysvec_apic_timer_interrupt+0x102/0x3e0 arch/x86/kernel/apic/apic.c:1062
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 0b 44 69 f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> 23 bb 30 f6 65 8b 05 7c 60 3f 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc9000413f320 EFLAGS: 00000206
RAX: c28507f960218500 RBX: 0000000000000a06 RCX: c28507f960218500
RDX: 0000000000000007 RSI: ffffffff8d997e54 RDI: 0000000000000001
RBP: ffffc9000413f3b0 R08: ffffffff8fa22f77 R09: 1ffffffff1f445ee
R10: dffffc0000000000 R11: fffffbfff1f445ef R12: dffffc0000000000
R13: 0000000000000000 R14: ffff8880b8628240 R15: 1ffff92000827e64
 hrtimer_start include/linux/hrtimer.h:259 [inline]
 stimer_start arch/x86/kvm/hyperv.c:682 [inline]
 kvm_hv_process_stimers+0xd0a/0x16a0 arch/x86/kvm/hyperv.c:893
 vcpu_enter_guest arch/x86/kvm/x86.c:11193 [inline]
 vcpu_run+0x2240/0x76b0 arch/x86/kvm/x86.c:11639
 kvm_arch_vcpu_ioctl_run+0x1148/0x1c90 arch/x86/kvm/x86.c:11984
 kvm_vcpu_ioctl+0x99a/0xed0 virt/kvm/kvm_main.c:4492
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f776b02b489
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 1c 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f776afdc218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f776b0ae328 RCX: 00007f776b02b489
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f776b0ae320 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f776b07b1bc
R13: 0000200000000000 R14: 0000200000000140 R15: 0000200000000040
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.261 msecs