linux-kernel - Re: [PATCH v2 0/3] arm64/fpsimd: Fix use after free in SME when changing SVE VL

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Date:   Fri, 21 Jul 2023 11:53:37 +0100
From:   Will Deacon <will@...nel.org>
To:     Catalin Marinas <catalin.marinas@....com>,
        Shuah Khan <shuah@...nel.org>, Mark Brown <broonie@...nel.org>
Cc:     kernel-team@...roid.com, Will Deacon <will@...nel.org>,
        linux-arm-kernel@...ts.infradead.org,
        David Spickett <David.Spickett@....com>,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v2 0/3] arm64/fpsimd: Fix use after free in SME when changing SVE VL

On Thu, 20 Jul 2023 19:38:57 +0100, Mark Brown wrote:
> This series fixes an issue which David Spickett found where if we change
> the SVE VL while SME is in use we can end up attempting to save state to
> an unallocated buffer and adds testing coverage for that plus a bit more
> coverage of VL changes, just for paranioa.
> 
> 

Applied first patch to arm64 (for-next/fixes), thanks!

[1/3] arm64/fpsimd: Ensure SME storage is allocated after SVE VL changes
      https://git.kernel.org/arm64/c/d4d5be94a878

I'll look at the selftests stuff for 6.6 when I get to that (probably
next week).

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev