linux-kernel - Re: [PATCH] crypto: x86/aes-gcm-vaes-avx2 - initialize full %rax return register

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Message-ID: <20251104055153.GC3674@sol>
Date: Mon, 3 Nov 2025 21:51:53 -0800
From: Eric Biggers <ebiggers@...nel.org>
To: linux-crypto@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, Ard Biesheuvel <ardb@...nel.org>,
	"Jason A . Donenfeld" <Jason@...c4.com>,
	Herbert Xu <herbert@...dor.apana.org.au>
Subject: Re: [PATCH] crypto: x86/aes-gcm-vaes-avx2 - initialize full %rax
 return register

On Sat, Nov 01, 2025 at 06:52:56PM -0700, Eric Biggers wrote:
> Update aes_gcm_dec_final_vaes_avx2() to be consistent with
> aes_gcm_dec_final_aesni() and aes_gcm_dec_final_vaes_avx512() by
> initializing the full %rax return register instead of just %al.
> Technically this is unnecessary, since these functions return bool.  But
> I think it's worth being extra careful with the result of the tag
> comparison and also keeping the different implementations consistent.
> 
> Signed-off-by: Eric Biggers <ebiggers@...nel.org>
> ---
> 
> This patch is targeting libcrypto-next

Applied to https://git.kernel.org/pub/scm/linux/kernel/git/ebiggers/linux.git/log/?h=libcrypto-next

- Eric