linux-hardening - Re: [PATCH] soc: qcom: cmd-db: replace deprecated strncpy with memcpy

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Message-ID: <202403181646.667970F76@keescook>
Date: Mon, 18 Mar 2024 16:49:52 -0700
From: Kees Cook <keescook@...omium.org>
To: Justin Stitt <justinstitt@...gle.com>
Cc: Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-hardening@...r.kernel.org
Subject: Re: [PATCH] soc: qcom: cmd-db: replace deprecated strncpy with memcpy

On Mon, Mar 18, 2024 at 03:47:38PM -0700, Justin Stitt wrote:
> Gotcha, I was operating under the assumption that we needed to know
> the size of id at compile time. Apparently __builtin_object_size(_, 1)
> will return SIZE_T_MAX if we don't know the size of something. Sending
> a v2.

Yeah, it only requires to know the compile-time size of the destination
buffer.

-- 
Kees Cook