Re: general protection fault in vmx_vcpu_run (2)
From: Dmitry Vyukov
Date: Thu Feb 25 2021 - 09:15:22 EST
On Wed, Feb 24, 2021 at 6:49 PM Borislav Petkov <bp@xxxxxxxxx> wrote:
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Hi Dmitry,
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On Wed, Feb 24, 2021 at 06:12:57PM +0100, Dmitry Vyukov wrote:
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> Looking at the bisection log, the bisection was distracted by something else.
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Meaning the bisection result:
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167dcfc08b0b ("x86/mm: Increase pgt_buf size for 5-level page tables")
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is bogus?
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> You can always find the original reported issue over the dashboard link:
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> https://syzkaller.appspot.com/bug?extid=42a71c84ef04577f1aef
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> or on lore:
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> https://lore.kernel.org/lkml/0000000000007ff56205ba985b60@xxxxxxxxxx/
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Ok, so this looks like this is trying to run kvm ioctls *in* a guest,
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i.e., nested. Right?
Yes, testing happens in VM. But the kernel that crashes is the one
that receives the ioctls.