linux-kernel - Re: [PATCH] arm64/sme: Set new vector length before reallocating

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Message-Id: <169039710582.703186.12071568238096709534.b4-ty@arm.com>
Date:   Wed, 26 Jul 2023 19:45:31 +0100
From:   Catalin Marinas <catalin.marinas@....com>
To:     Will Deacon <will@...nel.org>, Mark Brown <broonie@...nel.org>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64/sme: Set new vector length before reallocating

On Wed, 26 Jul 2023 13:12:26 +0100, Mark Brown wrote:
> As part of fixing the allocation of the buffer for SVE state when changing
> SME vector length we introduced an immediate reallocation of the SVE state,
> this is also done when changing the SVE vector length for consistency.
> Unfortunately this reallocation is done prior to writing the new vector
> length to the task struct, meaning the allocation is done with the old
> vector length and can lead to memory corruption due to an undersized buffer
> being used.
> 
> [...]

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

[1/1] arm64/sme: Set new vector length before reallocating
      https://git.kernel.org/arm64/c/05d881b85b48

-- 
Catalin