linux-kernel - Re: [PATCH v5 0/2] Remove false-positive VLAs when using max()

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Message-ID: <20180316201803.GH30522@ZenIV.linux.org.uk>
Date:   Fri, 16 Mar 2018 20:18:03 +0000
From:   Al Viro <viro@...IV.linux.org.uk>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Florian Weimer <fweimer@...hat.com>,
        Kees Cook <keescook@...omium.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        Randy Dunlap <rdunlap@...radead.org>,
        Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
        Ingo Molnar <mingo@...nel.org>,
        David Laight <David.Laight@...lab.com>,
        Ian Abbott <abbotti@....co.uk>,
        linux-input <linux-input@...r.kernel.org>,
        linux-btrfs <linux-btrfs@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Kernel Hardening <kernel-hardening@...ts.openwall.com>
Subject: Re: [PATCH v5 0/2] Remove false-positive VLAs when using max()

On Fri, Mar 16, 2018 at 01:15:27PM -0700, Linus Torvalds wrote:
> On Fri, Mar 16, 2018 at 1:12 PM, Al Viro <viro@...iv.linux.org.uk> wrote:
> >
> > That's C99, straight from N1256.pdf (C99-TC3)...
> 
> I checked C90, since the error is
> 
>    ISO C90 forbids variable length array
> 
> and I didn't see anything there.

Well, yes - VLA are new in C99; C90 never had those...