rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=39777, q=106 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10501 (4294990778-4294980277), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g39777 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:26920 pid:17    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x1553/0x45a0 kernel/sched/core.c:6700
 schedule+0xbd/0x170 kernel/sched/core.c:6774
 schedule_timeout+0x188/0x2d0 kernel/time/timer.c:2168
 rcu_gp_fqs_loop+0x313/0x1590 kernel/rcu/tree.c:1667
 rcu_gp_kthread+0x9d/0x3b0 kernel/rcu/tree.c:1866
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </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: 9023 Comm: syz.2.913 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:27 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:207 [inline]
RIP: 0010:native_write_msr arch/x86/include/asm/msr.h:147 [inline]
RIP: 0010:wrmsr arch/x86/include/asm/msr.h:254 [inline]
RIP: 0010:native_apic_msr_write+0x39/0x50 arch/x86/include/asm/apic.h:196
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 89 f6 31 d2 e9 8b eb 23 03 66 2e 0f 1f 84 00 00 00 00 00
RSP: 0018:ffffc900001f0e58 EFLAGS: 00000046
RAX: 0000000000057087 RBX: ffff8880b8f28280 RCX: 0000000000000838
RDX: 0000000000000000 RSI: 0000000000057087 RDI: 0000000000000838
RBP: 0000000000000000 R08: ffffffff8e8b02af R09: 1ffffffff1d16055
R10: dffffc0000000000 R11: fffffbfff1d16056 R12: dffffc0000000000
R13: 000000000ffff94a R14: 0000000000057087 R15: 0000000000000020
FS:  00007f95a05f66c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c405e76 CR3: 000000003027c000 CR4: 00000000003506e0
Call Trace:
 <IRQ>
 apic_write arch/x86/include/asm/apic.h:404 [inline]
 lapic_next_event+0x11/0x20 arch/x86/kernel/apic/apic.c:448
 clockevents_program_event+0x1c0/0x310 kernel/time/clockevents.c:334
 hrtimer_interrupt+0x5a1/0x9c0 kernel/time/hrtimer.c:1889
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1077 [inline]
 __sysvec_apic_timer_interrupt+0xfb/0x3b0 arch/x86/kernel/apic/apic.c:1094
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
 sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1088
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:xrstor_from_user_sigframe arch/x86/kernel/fpu/xstate.h:304 [inline]
RIP: 0010:__restore_fpregs_from_user arch/x86/kernel/fpu/signal.c:259 [inline]
RIP: 0010:restore_fpregs_from_user arch/x86/kernel/fpu/signal.c:289 [inline]
RIP: 0010:__fpu_restore_sig arch/x86/kernel/fpu/signal.c:359 [inline]
RIP: 0010:fpu__restore_sig+0x5b2/0x11c0 arch/x86/kernel/fpu/signal.c:493
Code: 49 8b 7d 00 4c 8b 74 24 60 4c 89 f6 ba 01 00 00 00 e8 82 35 00 00 0f 01 cb 48 8b 7c 24 50 44 89 f0 48 8b 54 24 68 48 0f ae 2f <31> c0 41 89 c5 0f 01 ca 48 23 5c 24 78 31 ff 44 89 ee e8 97 4b 55
RSP: 0018:ffffc90019a7fb20 EFLAGS: 00040286
RAX: 0000000000000007 RBX: 0000000000000007 RCX: 0000000000080000
RDX: 0000000000000000 RSI: 000000000007ffff RDI: 00007f95a05f5d00
RBP: ffffc90019a7fcf0 R08: ffffc90019a7fc7f R09: 1ffff9200334ff8f
R10: dffffc0000000000 R11: fffff5200334ff90 R12: 1ffff9200334ff74
R13: ffff88802d0b7350 R14: 0000000000000007 R15: 1ffff11005a16e30
 restore_sigcontext arch/x86/kernel/signal_64.c:95 [inline]
 __ia32_sys_rt_sigreturn+0x6e2/0x860 arch/x86/kernel/signal_64.c:266
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f95a239c817
Code: 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89
RSP: 002b:00007f95a05f60e8 EFLAGS: 00000246
RAX: 00000000000000ca RBX: 00007f95a2616098 RCX: 00007f95a239c819
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f95a2616098
RBP: 00007f95a2616090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f95a2616128 R14: 00007ffe30a96e90 R15: 00007ffe30a96f78
 </TASK>