linux-kernel - Re: [syzbot ci] Re: KVM: VMX APIC timer virtualization support

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Message-ID: <aYbQiS8k5K23bHE_@iyamahat-desk>
Date: Fri, 6 Feb 2026 21:41:29 -0800
From: Isaku Yamahata <isaku.yamahata@...el.com>
To: syzbot ci <syzbot+ci66a37fb2e2f8de71@...kaller.appspotmail.com>
Cc: isaku.yamahata@...il.com, isaku.yamahata@...el.com, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, oliver.sang@...el.com,
	pbonzini@...hat.com, seanjc@...gle.com, yang.zhong@...ux.intel.com,
	syzbot@...ts.linux.dev, syzkaller-bugs@...glegroups.com,
	isaku.yamahata@...ux.intel.com
Subject: Re: [syzbot ci] Re: KVM: VMX APIC timer virtualization support

On Tue, Feb 03, 2026 at 11:46:26PM -0800,
syzbot ci <syzbot+ci66a37fb2e2f8de71@...kaller.appspotmail.com> wrote:
...
> Full report is available here:
> https://ci.syzbot.org/series/febd2a47-f17d-45ba-954d-44cd44564c81
> 
> ***
> 
> general protection fault in kvm_sync_apic_virt_timer

This case is caused because in-lapic is disabled.
I'll fix this gp fault with the next respin by adding in-kernel lapic check
to disable nested apic timer virtualization.
-- 
Isaku Yamahata <isaku.yamahata@...el.com>