From: Andrew Morton <akpm@linux-foundation.org>
To: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Kees Cook <keescook@chromium.org>, linux-kernel@vger.kernel.org
Subject: Re: [RFC 0/7] eliminate snprintf with overlapping src and dst
Date: Wed, 9 Mar 2016 12:49:40 -0800 [thread overview]
Message-ID: <20160309124940.7d870c59a7a7117c6c6d7937@linux-foundation.org> (raw)
In-Reply-To: <1457469654-17059-1-git-send-email-linux@rasmusvillemoes.dk>
On Tue, 8 Mar 2016 21:40:47 +0100 Rasmus Villemoes <linux@rasmusvillemoes.dk> wrote:
> Doing snprintf(buf, len, "%s...", buf, ...) for appending to a buffer
> currently works, but it is somewhat fragile, and any other overlap
> between source and destination buffers would be a definite bug. This
> is an attempt at eliminating the relatively few occurences of this
> pattern in the kernel.
I dunno,
snprintf(analog->name, sizeof(analog->name), "Analog %d-axis %d-button",
is pretty damn convenient. Can we instead state that "sprintf shall
support this"? Maybe add a little __init testcase to vsprintf.c to
check that it continues to work OK.
next prev parent reply other threads:[~2016-03-09 20:49 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-05 20:38 snprintf, overlapping destination and source Rasmus Villemoes
2015-12-05 20:42 ` Julia Lawall
2015-12-07 22:04 ` Kees Cook
2015-12-16 13:14 ` Rasmus Villemoes
2016-03-08 20:40 ` [RFC 0/7] eliminate snprintf with overlapping src and dst Rasmus Villemoes
2016-03-08 20:40 ` [RFC 1/7] drm/amdkfd: avoid fragile and inefficient snprintf use Rasmus Villemoes
2016-03-14 14:33 ` Oded Gabbay
2016-03-14 19:18 ` Rasmus Villemoes
2016-03-08 20:40 ` [RFC 2/7] Input: joystick - avoid fragile " Rasmus Villemoes
2016-03-09 6:49 ` Andy Shevchenko
2016-03-08 20:40 ` [RFC 3/7] leds: avoid fragile sprintf use Rasmus Villemoes
2016-03-08 20:40 ` [RFC 4/7] drivers/media/pci/zoran: avoid fragile snprintf use Rasmus Villemoes
2016-03-08 20:40 ` [RFC 5/7] wlcore: " Rasmus Villemoes
2016-03-09 11:49 ` Kalle Valo
2016-03-08 20:40 ` [RFC 6/7] [media] ati_remote: " Rasmus Villemoes
2016-03-08 20:40 ` [RFC 7/7] USB: usbatm: avoid fragile and inefficient " Rasmus Villemoes
2016-03-08 21:01 ` Joe Perches
2016-03-10 23:56 ` Greg Kroah-Hartman
2016-03-09 13:08 ` Sergei Shtylyov
2016-03-08 23:07 ` [RFC 0/7] eliminate snprintf with overlapping src and dst Kees Cook
2016-03-08 23:13 ` Kees Cook
2016-03-09 6:51 ` Andy Shevchenko
2016-03-09 20:49 ` Andrew Morton [this message]
2016-03-09 22:19 ` Rasmus Villemoes
2016-03-10 13:59 ` One Thousand Gnomes
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