gentoo-overlay/app-shells/bash/files/bash-4.2-dev-fd-buffer-overflow.patch

https://bugs.gentoo.org/431850

this is a minor tweak to the upstream patch to also apply to bash 4.1/4.0/3.2

			     BASH PATCH REPORT
			     =================

Bash-Release:	4.2
Patch-ID:	bash42-033

Bug-Reported-by:	David Leverton <levertond@googlemail.com>
Bug-Reference-ID:	<4FCCE737.1060603@googlemail.com>
Bug-Reference-URL:

Bug-Description:

Bash uses a static buffer when expanding the /dev/fd prefix for the test
and conditional commands, among other uses, when it should use a dynamic
buffer to avoid buffer overflow.

Patch (apply with `patch -p0'):

*** bash-4.2/lib/sh/eaccess.c
--- bash-4.2/lib/sh/eaccess.c
***************
*** 83,86 ****
--- 83,88 ----
       struct stat *finfo;
  {
+   static char *pbuf = 0;
+ 
    if (*path == '\0')
      {
***************
*** 107,111 ****
       On most systems, with the notable exception of linux, this is
       effectively a no-op. */
!       char pbuf[32];
        strcpy (pbuf, DEV_FD_PREFIX);
        strcat (pbuf, path + 8);
--- 109,113 ----
       On most systems, with the notable exception of linux, this is
       effectively a no-op. */
!       pbuf = xrealloc (pbuf, sizeof (DEV_FD_PREFIX) + strlen (path + 8));
        strcpy (pbuf, DEV_FD_PREFIX);
        strcat (pbuf, path + 8);