From: Borislav Petkov <bp@alien8.de>
To: syzbot <syzbot+42a71c84ef04577f1aef@syzkaller.appspotmail.com>
Cc: dave.hansen@intel.com, hpa@zytor.com, jmattson@google.com,
joro@8bytes.org, kirill.shutemov@linux.intel.com,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
lstoakes@gmail.com, mingo@redhat.com, pbonzini@redhat.com,
seanjc@google.com, syzkaller-bugs@googlegroups.com,
tglx@linutronix.de, vkuznets@redhat.com, wanpengli@tencent.com,
x86@kernel.org
Subject: Re: general protection fault in vmx_vcpu_run (2)
Date: Wed, 24 Feb 2021 13:27:10 +0100 [thread overview]
Message-ID: <20210224122710.GB20344@zn.tnic> (raw)
In-Reply-To: <00000000000004e7d105bc091e06@google.com>
On Tue, Feb 23, 2021 at 03:17:07PM -0800, syzbot wrote:
> syzbot has bisected this issue to:
>
> commit 167dcfc08b0b1f964ea95d410aa496fd78adf475
> Author: Lorenzo Stoakes <lstoakes@gmail.com>
> Date: Tue Dec 15 20:56:41 2020 +0000
>
> x86/mm: Increase pgt_buf size for 5-level page tables
>
> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13fe3ea8d00000
> start commit: a99163e9 Merge tag 'devicetree-for-5.12' of git://git.kern..
> git tree: upstream
> final oops: https://syzkaller.appspot.com/x/report.txt?x=10013ea8d00000
No oops here.
> console output: https://syzkaller.appspot.com/x/log.txt?x=17fe3ea8d00000
Nothing special here too.
> kernel config: https://syzkaller.appspot.com/x/.config?x=49116074dd53b631
Tried this on two boxes, the Intel one doesn't even boot with that
config - and it is pretty standard one - and on the AMD one the
reproducer doesn't trigger anything. It probably won't because the GP
is in vmx_vcpu_run() but since the ioctls were doing something with
IRQCHIP, I thought it is probably vendor-agnostic.
So, all in all, I could use some more info on how you're reproducing and
maybe you could show the oops too.
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2021-02-24 12:28 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-05 15:20 general protection fault in vmx_vcpu_run (2) syzbot
2021-02-23 8:56 ` syzbot
2021-02-23 23:17 ` syzbot
2021-02-24 12:27 ` Borislav Petkov [this message]
2021-02-24 17:12 ` Dmitry Vyukov
2021-02-24 17:49 ` Borislav Petkov
2021-02-24 18:07 ` Sean Christopherson
2021-02-25 14:16 ` Dmitry Vyukov
2021-02-25 20:25 ` Sean Christopherson
2021-02-25 14:14 ` Dmitry Vyukov
2023-07-10 22:30 ` Sean Christopherson
2023-07-10 22:50 ` [syzbot] [kvm?] " syzbot
2023-07-10 23:39 ` Sean Christopherson
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