rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=35477, q=415 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10500 (4294992645-4294982145), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10500 jiffies! g35477 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:28328 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x1139/0x6150 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:6960
 schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x1ea/0xaf0 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x26d/0x380 kernel/rcu/tree.c:2285
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 10032 Comm: syz.4.1086 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:37 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:139 [inline]
RIP: 0010:wrmsrq arch/x86/include/asm/msr.h:199 [inline]
RIP: 0010:native_apic_msr_write arch/x86/include/asm/apic.h:212 [inline]
RIP: 0010:native_apic_msr_write+0x28/0x40 arch/x86/include/asm/apic.h:206
Code: 90 90 f3 0f 1e fa 8d 87 30 ff ff ff 83 e0 ef 74 20 89 f8 83 e0 ef 83 f8 20 74 16 c1 ef 04 31 d2 89 f0 8d 8f 00 08 00 00 0f 30 <66> 90 e9 91 06 10 0a e9 8c 06 10 0a 89 f6 31 d2 89 cf e9 e1 e9 76
RSP: 0018:ffffc90000a08ec8 EFLAGS: 00000046
RAX: 000000000000627e RBX: ffff8880b8523f40 RCX: 0000000000000838
RDX: 0000000000000000 RSI: 000000000000627e RDI: 0000000000000038
RBP: 000000000000627e R08: 0000000000000005 R09: 000000000000003f
R10: 0000000000000020 R11: ffff88807bd10b30 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000020 R15: ffff8880b8528440
FS:  00007f7bedd596c0(0000) GS:ffff8881249f5000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000020000057eff8 CR3: 0000000047ee1000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 apic_write arch/x86/include/asm/apic.h:409 [inline]
 lapic_next_event+0x10/0x20 arch/x86/kernel/apic/apic.c:418
 clockevents_program_event+0x26e/0x370 kernel/time/clockevents.c:334
 tick_program_event+0xa9/0x140 kernel/time/tick-oneshot.c:48
 hrtimer_interrupt+0x3e9/0x8e0 kernel/time/hrtimer.c:1916
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline]
 __sysvec_apic_timer_interrupt+0x10b/0x3c0 arch/x86/kernel/apic/apic.c:1062
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0x9f/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_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 8b 74 24 08 48 89 fb 48 83 c7 18 e8 7a 0e 1f f6 48 89 df e8 32 61 1f f6 e8 ad 24 4c f6 fb bf 01 00 00 00 <e8> 42 64 0f f6 65 8b 05 9b c9 37 08 85 c0 74 06 5b e9 01 4d 00 00
RSP: 0018:ffffc90005317ca0 EFLAGS: 00000202
RAX: 000000000a3bc5e5 RBX: ffff88802850ae40 RCX: ffffffff81c70a3f
RDX: 0000000000000000 RSI: ffffffff8dacdf79 RDI: 0000000000000001
RBP: ffff88802850b040 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff9088b6d7 R11: ffff88807bd10b30 R12: 0000000000000000
R13: 0000000000000011 R14: 0000000000000200 R15: ffff88802850ae40
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x1e6a/0x26d0 kernel/signal.c:3037
 arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x8c/0x540 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7becf8f749
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:00007f7bedd590e8 EFLAGS: 00000246
RAX: fffffffffffffffc RBX: 00007f7bed1e5fa8 RCX: 00007f7becf8f749
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f7bed1e5fa8
RBP: 00007f7bed1e5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7bed1e6038 R14: 00007ffdbfa173f0 R15: 00007ffdbfa174d8
 </TASK>