linux-kernel - Re: [PATCH v3 0/2] Fix for a very old KVM bug in the segment cache

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <172443880691.4128502.17704045067981306299.b4-ty@google.com>
Date: Fri, 23 Aug 2024 16:48:05 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, kvm@...r.kernel.org, 
	Maxim Levitsky <mlevitsk@...hat.com>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>, Thomas Gleixner <tglx@...utronix.de>, 
	Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>, "H. Peter Anvin" <hpa@...or.com>, 
	linux-kernel@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>, x86@...nel.org
Subject: Re: [PATCH v3 0/2] Fix for a very old KVM bug in the segment cache

On Thu, 25 Jul 2024 13:52:30 -0400, Maxim Levitsky wrote:
> Recently, while trying to understand why the pmu_counters_test
> selftest sometimes fails when run nested I stumbled
> upon a very interesting and old bug:
> 
> It turns out that KVM caches guest segment state,
> but this cache doesn't have any protection against concurrent use.
> 
> [...]

Applied patch 1 to kvm-x86 vmx, thanks!

[1/2] KVM: nVMX: use vmx_segment_cache_clear
      https://github.com/kvm-x86/linux/commit/41ab0d59faa9

--
https://github.com/kvm-x86/linux/tree/next