From: Sean Christopherson <seanjc@google.com>
To: syzbot <syzbot+545f1326f405db4e1c3e@syzkaller.appspotmail.com>
Cc: bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
mingo@redhat.com, mlevitsk@redhat.com, pbonzini@redhat.com,
syzkaller-bugs@googlegroups.com, tglx@linutronix.de,
x86@kernel.org
Subject: Re: [syzbot] [kvm?] WARNING in kvm_recalculate_apic_map
Date: Mon, 8 Jul 2024 09:35:51 -0700 [thread overview]
Message-ID: <ZowVZ-WgT7lgMt-Z@google.com> (raw)
In-Reply-To: <000000000000c2a6b9061cbca3c3@google.com>
On Mon, Jul 08, 2024, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: f3a2439f20d9 Merge tag 'rproc-v6.3' of git://git.kernel.or..
> git tree: upstream
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=12e2d518c80000
> kernel config: https://syzkaller.appspot.com/x/.config?x=81f5afa0c201c8de
> dashboard link: https://syzkaller.appspot.com/bug?extid=545f1326f405db4e1c3e
> compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16b7be60c80000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11a380a8c80000
>
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/0719d575f3ac/disk-f3a2439f.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/4176aabb67b5/vmlinux-f3a2439f.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/2b0e3c0ab205/bzImage-f3a2439f.xz
>
> The issue was bisected to:
>
> commit 76e527509d37a15ff1714ddd003384f5f25fd3fc
> Author: Sean Christopherson <seanjc@google.com>
> Date: Fri Jan 6 01:12:52 2023 +0000
>
> KVM: x86: Skip redundant x2APIC logical mode optimized cluster setup
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=124fbe60c80000
> final oops: https://syzkaller.appspot.com/x/report.txt?x=114fbe60c80000
> console output: https://syzkaller.appspot.com/x/log.txt?x=164fbe60c80000
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+545f1326f405db4e1c3e@syzkaller.appspotmail.com
> Fixes: 76e527509d37 ("KVM: x86: Skip redundant x2APIC logical mode optimized cluster setup")
Known bug, I see if my random thought from that thread actually fixes the issue.
https://lkml.kernel.org/r/20240126161633.62529-1-haoyuwu254%40gmail.com
prev parent reply other threads:[~2024-07-08 16:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-08 13:46 [syzbot] [kvm?] WARNING in kvm_recalculate_apic_map syzbot
2024-07-08 16:35 ` Sean Christopherson [this message]
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