linux-hardening - Re: [PATCH v2 0/4] KVM: arm64: UBSAN at EL2

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Message-ID: <202504301131.3C1CBCA8@keescook>
Date: Wed, 30 Apr 2025 11:32:23 -0700
From: Kees Cook <kees@...nel.org>
To: Mostafa Saleh <smostafa@...gle.com>
Cc: kvmarm@...ts.linux.dev, kasan-dev@...glegroups.com,
	linux-hardening@...r.kernel.org, linux-kbuild@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	will@...nel.org, maz@...nel.org, oliver.upton@...ux.dev,
	broonie@...nel.org, catalin.marinas@....com, tglx@...utronix.de,
	mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
	x86@...nel.org, hpa@...or.com, elver@...gle.com,
	andreyknvl@...il.com, ryabinin.a.a@...il.com,
	akpm@...ux-foundation.org, yuzenghui@...wei.com,
	suzuki.poulose@....com, joey.gouly@....com, masahiroy@...nel.org,
	nathan@...nel.org, nicolas.schier@...ux.dev
Subject: Re: [PATCH v2 0/4] KVM: arm64: UBSAN at EL2

On Wed, Apr 30, 2025 at 04:27:07PM +0000, Mostafa Saleh wrote:
> Many of the sanitizers the kernel supports are disabled when running
> in EL2 with nvhe/hvhe/proctected modes, some of those are easier
> (and makes more sense) to integrate than others.
> Last year, kCFI support was added in [1]
> 
> This patchset adds support for UBSAN in EL2.

This touches both UBSAN and arm64 -- I'm happy to land this via the
hardening tree, but I expect the arm64 folks would rather take it via
their tree. What would people like to have happen?

-Kees

-- 
Kees Cook