Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1353474

Re: [RFC 0/7] eliminate snprintf with overlapping src and dst

Show all headers | View raw

On Tue, Mar 8, 2016 at 12:40 PM, 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.

Can we add a gcc plugin to detect these and refuse to compile when
they're found?

-Kees

-- 
Kees Cook
Chrome OS & Brillo Security

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[RFC 0/7] eliminate snprintf with overlapping src and dst Rasmus Villemoes <linux@rasmusvillemoes.dk> - 2016-03-08 21:50 +0100
  [RFC 5/7] wlcore: avoid fragile snprintf use Rasmus Villemoes <linux@rasmusvillemoes.dk> - 2016-03-08 21:50 +0100
    Re: [RFC 5/7] wlcore: avoid fragile snprintf use Kalle Valo <kvalo@codeaurora.org> - 2016-03-09 12:50 +0100
  [RFC 3/7] leds: avoid fragile sprintf use Rasmus Villemoes <linux@rasmusvillemoes.dk> - 2016-03-08 21:50 +0100
  [RFC 4/7] drivers/media/pci/zoran: avoid fragile snprintf use Rasmus Villemoes <linux@rasmusvillemoes.dk> - 2016-03-08 21:50 +0100
  [RFC 2/7] Input: joystick - avoid fragile snprintf use Rasmus Villemoes <linux@rasmusvillemoes.dk> - 2016-03-08 21:50 +0100
    Re: [RFC 2/7] Input: joystick - avoid fragile snprintf use Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-03-09 07:50 +0100
  [RFC 1/7] drm/amdkfd: avoid fragile and inefficient snprintf use Rasmus Villemoes <linux@rasmusvillemoes.dk> - 2016-03-08 21:50 +0100
    Re: [RFC 1/7] drm/amdkfd: avoid fragile and inefficient snprintf use Oded Gabbay <oded.gabbay@gmail.com> - 2016-03-14 15:40 +0100
      Re: [RFC 1/7] drm/amdkfd: avoid fragile and inefficient snprintf use Rasmus Villemoes <linux@rasmusvillemoes.dk> - 2016-03-14 20:20 +0100
  Re: [RFC 0/7] eliminate snprintf with overlapping src and dst Kees Cook <keescook@chromium.org> - 2016-03-09 00:10 +0100
  Re: [RFC 0/7] eliminate snprintf with overlapping src and dst Kees Cook <keescook@chromium.org> - 2016-03-09 00:20 +0100
  Re: [RFC 0/7] eliminate snprintf with overlapping src and dst Andy Shevchenko <andy.shevchenko@gmail.com> - 2016-03-09 08:00 +0100
  Re: [RFC 0/7] eliminate snprintf with overlapping src and dst Andrew Morton <akpm@linux-foundation.org> - 2016-03-09 21:50 +0100
    Re: [RFC 0/7] eliminate snprintf with overlapping src and dst Rasmus Villemoes <linux@rasmusvillemoes.dk> - 2016-03-09 23:20 +0100
    Re: [RFC 0/7] eliminate snprintf with overlapping src and dst One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk> - 2016-03-10 15:10 +0100

csiph-web