From: Steven Rostedt <rostedt@goodmis.org>
To: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kees Cook <keescook@chromium.org>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, corbet@lwn.net,
gustavo@embeddedor.com, Chris Mason <clm@fb.com>,
Josef Bacik <jbacik@fb.com>, David Sterba <dsterba@suse.com>,
"David S. Miller" <davem@davemloft.net>,
Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
Ingo Molnar <mingo@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Thomas Gleixner <tglx@linutronix.de>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Borislav Petkov <bp@suse.de>,
Randy Dunlap <rdunlap@infradead.org>,
Ian Abbott <abbotti@mev.co.uk>, "Tobin C. Harding" <me@tobin.cc>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
Petr Mladek <pmladek@suse.com>,
Andy Shev
Subject: Re: [PATCH 0/3] Remove accidental VLA usage
Date: Thu, 8 Mar 2018 13:06:33 -0500 [thread overview]
Message-ID: <20180308130633.0d819f44@vmware.local.home> (raw)
In-Reply-To: <20180308150236.5tysfbm3xdouii5n@treble>
On Thu, 8 Mar 2018 09:02:36 -0600
Josh Poimboeuf <jpoimboe@redhat.com> wrote:
> On Wed, Mar 07, 2018 at 07:30:44PM -0800, Kees Cook wrote:
> > This series adds SIMPLE_MAX() to be used in places where a stack array
> > is actually fixed, but the compiler still warns about VLA usage due to
> > confusion caused by the safety checks in the max() macro.
> >
> > I'm sending these via -mm since that's where I've introduced SIMPLE_MAX(),
> > and they should all have no operational differences.
>
> What if we instead simplify the max() macro's type checking so that GCC
> can more easily fold the array size constants? The below patch seems to
> work:
Nice. Have you tried to do a allmodconfig and build on various archs?
Of course pushing it to kernel.org will have the zero day bot do it for
you ;-)
-- Steve
next prev parent reply other threads:[~2018-03-08 18:06 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-08 3:30 [PATCH 0/3] Remove accidental VLA usage Kees Cook
2018-03-08 3:30 ` [PATCH v2 1/3] vsprintf: " Kees Cook
2018-03-08 8:25 ` Rasmus Villemoes
2018-03-08 11:21 ` Thomas Gleixner
2018-03-08 3:30 ` [PATCH 2/3] net: Remove accidental VLAs from proc buffers Kees Cook
2018-03-08 3:30 ` [PATCH 3/3] btrfs: tree-checker: Avoid accidental stack VLA Kees Cook
2018-03-08 11:33 ` David Sterba
2018-03-08 15:02 ` [PATCH 0/3] Remove accidental VLA usage Josh Poimboeuf
2018-03-08 18:02 ` Kees Cook
2018-03-08 18:11 ` Josh Poimboeuf
2018-03-08 18:06 ` Steven Rostedt [this message]
2018-03-08 19:57 ` Rasmus Villemoes
2018-03-08 20:39 ` Kees Cook
2018-03-08 22:12 ` Rasmus Villemoes
2018-03-08 23:33 ` Kees Cook
2018-03-08 20:49 ` Andrew Morton
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180308130633.0d819f44@vmware.local.home \
--to=rostedt@goodmis.org \
--cc=abbotti@mev.co.uk \
--cc=akpm@linux-foundation.org \
--cc=bp@suse.de \
--cc=clm@fb.com \
--cc=corbet@lwn.net \
--cc=davem@davemloft.net \
--cc=dsterba@suse.com \
--cc=gustavo@embeddedor.com \
--cc=jbacik@fb.com \
--cc=jpoimboe@redhat.com \
--cc=keescook@chromium.org \
--cc=kuznet@ms2.inr.ac.ru \
--cc=linux-kernel@vger.kernel.org \
--cc=me@tobin.cc \
--cc=mingo@kernel.org \
--cc=peterz@infradead.org \
--cc=pmladek@suse.com \
--cc=rdunlap@infradead.org \
--cc=sergey.senozhatsky.work@gmail.com \
--cc=tglx@linutronix.de \
--cc=yamada.masahiro@socionext.com \
--cc=yoshfuji@linux-ipv6.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).