From: Kees Cook <keescook@chromium.org>
To: Joe Perches <joe@perches.com>
Cc: Denis Efremov <efremov@linux.com>,
Julia Lawall <julia.lawall@inria.fr>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-usb@vger.kernel.org,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
linux-kernel@vger.kernel.org, cocci <cocci@systeme.lip6.fr>,
Alex Dewar <alex.dewar90@gmail.com>
Subject: Re: [Cocci] [PATCH] usb: atm: don't use snprintf() for sysfs attrs
Date: Fri, 28 Aug 2020 00:58:37 -0700 [thread overview]
Message-ID: <202008280056.6442BCC@keescook> (raw)
In-Reply-To: <d99c613aa70617f440c51d9413372b858a4ae826.camel@perches.com>
On Thu, Aug 27, 2020 at 09:12:06PM -0700, Joe Perches wrote:
> Perhaps something like the below with a sample conversion
> that uses single and multiple sysfs_emit uses.
On quick review, I like it. :)
> [...]
> +int sysfs_emit(char *buf, char *pos, const char *fmt, ...)
> +{
> + int len;
> + va_list args;
> +
> + WARN(pos < buf, "pos < buf\n");
> + WARN(pos - buf >= PAGE_SIZE, "pos >= PAGE_SIZE (%tu > %lu)\n",
> + pos - buf, PAGE_SIZE);
> + if (pos < buf || pos - buf >= PAGE_SIZE)
> + return 0;
This can be:
if (WARN(pos < buf, "pos < buf\n") ||
WARN(pos - buf >= PAGE_SIZE, "pos >= PAGE_SIZE (%tu > %lu)\n",
pos - buf, PAGE_SIZE))
return 0;
--
Kees Cook
next prev parent reply other threads:[~2020-08-28 7:58 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-24 22:23 [PATCH] usb: atm: don't use snprintf() for sysfs attrs Alex Dewar
2020-08-25 8:12 ` David Laight
2020-08-25 8:17 ` Alex Dewar
2020-08-25 9:07 ` David Laight
2020-08-25 8:24 ` Greg Kroah-Hartman
2020-08-27 16:49 ` Kees Cook
2020-08-27 17:45 ` Greg Kroah-Hartman
2020-08-27 6:42 ` Rasmus Villemoes
2020-08-27 7:15 ` Greg Kroah-Hartman
2020-08-27 13:18 ` Alex Dewar
2020-08-27 13:41 ` Rasmus Villemoes
2020-08-27 14:48 ` Alex Dewar
2020-08-27 16:58 ` Joe Perches
2020-08-27 19:42 ` [Cocci] " Julia Lawall
2020-08-27 20:29 ` Joe Perches
2020-08-27 21:00 ` Joe Perches
2020-08-27 21:29 ` Julia Lawall
2020-08-27 22:03 ` David Laight
2020-08-27 22:11 ` Joe Perches
2020-08-27 22:16 ` Kees Cook
2020-08-27 21:01 ` Denis Efremov
2020-08-27 21:36 ` Julia Lawall
2020-08-27 21:44 ` Joe Perches
2020-08-27 22:38 ` Denis Efremov
2020-08-27 22:48 ` Joe Perches
2020-08-27 22:20 ` Kees Cook
2020-08-27 22:45 ` Joe Perches
2020-08-28 4:12 ` Joe Perches
2020-08-28 7:58 ` Kees Cook [this message]
2020-08-28 8:10 ` Joe Perches
2020-08-28 8:22 ` Joe Perches
2020-08-28 7:39 ` David Laight
2020-08-27 21:54 ` David Laight
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