rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=12253, q=1383 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10500 (4294961560-4294951060), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10500 jiffies! g12253 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:27784 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5257 [inline]
 __schedule+0x14bc/0x5000 kernel/sched/core.c:6864
 __schedule_loop kernel/sched/core.c:6946 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6961
 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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6252 Comm: syz.1.93 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+0x39/0x50 arch/x86/include/asm/apic.h:212
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 c3 cc cc cc cc cc f3 0f 1e fa 89 f6 31 d2 e9 b2 bd 54 03 66
RSP: 0018:ffffc90000a08e50 EFLAGS: 00000046
RAX: 000000000009373b RBX: ffff8880b8723e40 RCX: 0000000000000838
RDX: 0000000000000000 RSI: 000000000009373b RDI: 0000000000000838
RBP: 0000000000000000 R08: ffffffff81af69c5 R09: ffffffff998c9508
R10: 0000000000000003 R11: ffffffff81718b10 R12: 0000000010004676
R13: dffffc0000000000 R14: 000000000009373b R15: 0000000000000020
FS:  00007fcf6b1bd6c0(0000) GS:ffff888125f4f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557c4bd588 CR3: 00000000351de000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 apic_write arch/x86/include/asm/apic.h:409 [inline]
 lapic_next_event+0x11/0x20 arch/x86/kernel/apic/apic.c:418
 clockevents_program_event+0x1c9/0x350 kernel/time/clockevents.c:334
 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_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 89 fb 48 83 c7 18 48 8b 74 24 08 e8 ba a8 42 f6 48 89 df e8 f2 1f 43 f6 e8 bd 89 6d f6 fb bf 01 00 00 00 <e8> f2 0f 35 f6 65 8b 05 ab 10 21 07 85 c0 74 07 5b e9 51 4d 00 00
RSP: 0018:ffffc90004617c60 EFLAGS: 00000286
RAX: 3fbe4fd38ff70000 RBX: ffff8880310a3780 RCX: 3fbe4fd38ff70000
RDX: 0000000000000000 RSI: ffffffff8d783537 RDI: 0000000000000001
RBP: 0000000000000011 R08: ffffffff8f813377 R09: 1ffffffff1f0266e
R10: dffffc0000000000 R11: fffffbfff1f0266f R12: 1ffff11006214743
R13: 0000000000000000 R14: 0000000004000000 R15: ffff8880310a3a18
 spin_unlock_irq include/linux/spinlock.h:401 [inline]
 get_signal+0x11a7/0x1340 kernel/signal.c:3037
 arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x87/0x4f0 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+0x2e3/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcf6a38f749
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:00007fcf6b1bd0e8 EFLAGS: 00000246
RAX: fffffffffffffffc RBX: 00007fcf6a5e5fa8 RCX: 00007fcf6a38f749
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fcf6a5e5fa8
RBP: 00007fcf6a5e5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcf6a5e6038 R14: 00007ffd30373510 R15: 00007ffd303735f8
 </TASK>