linux-hardening - Re: [PATCH v2][next] sysctl: Avoid open coded arithmetic in memory allocator functions

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Message-ID: <20211024185427.GA1420234@embeddedor>
Date:   Sun, 24 Oct 2021 13:54:27 -0500
From:   "Gustavo A. R. Silva" <gustavoars@...nel.org>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     Len Baker <len.baker@....com>, Kees Cook <keescook@...omium.org>,
        Luis Chamberlain <mcgrof@...nel.org>,
        Iurii Zaikin <yzaikin@...gle.com>,
        linux-hardening@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2][next] sysctl: Avoid open coded arithmetic in memory
 allocator functions

On Sun, Oct 24, 2021 at 06:55:13PM +0100, Matthew Wilcox wrote:
> On Sun, Oct 24, 2021 at 11:13:28AM +0200, Len Baker wrote:
> 
> I think it's better for code to be understandable.  Your patch makes
> the code less readable in the name of "security", which is a poor
> justification.

I agree with Matthew. Those functions seem to be a bit too much, for
now.

Let's keep it simple and start by replacing the open-coded instances
when possible, first. Then we can dig much deeper depending on each
particular case, taking into consideration readability, which is
certainly important.

Thanks
--
Gustavo