linux-hardening - Re: [PATCH 64/82] netfilter: Refactor intentional wrap-around test

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Message-ID: <20240123180303.GB31645@breakpoint.cc>
Date: Tue, 23 Jan 2024 19:03:03 +0100
From: Florian Westphal <fw@...len.de>
To: Kees Cook <keescook@...omium.org>
Cc: linux-hardening@...r.kernel.org,
	Pablo Neira Ayuso <pablo@...filter.org>,
	Jozsef Kadlecsik <kadlec@...filter.org>,
	Florian Westphal <fw@...len.de>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	netfilter-devel@...r.kernel.org, coreteam@...filter.org,
	netdev@...r.kernel.org,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	Bill Wendling <morbo@...gle.com>,
	Justin Stitt <justinstitt@...gle.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 64/82] netfilter: Refactor intentional wrap-around test

Kees Cook <keescook@...omium.org> wrote:
> In an effort to separate intentional arithmetic wrap-around from
> unexpected wrap-around, we need to refactor places that depend on this
> kind of math. One of the most common code patterns of this is:
> 
> 	VAR + value < VAR

Acked-by: Florian Westphal <fw@...len.de>