Bash-4.2 Official Patch 24

[Chet Ramey]

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

Bash-Release:   4.2
Patch-ID:       bash42-024

Bug-Reported-by:        Jim Avera <james_avera@yahoo.com>
Bug-Reference-ID:       <4F29E07A.80405@yahoo.com>
Bug-Reference-URL:      
http://lists.gnu.org/archive/html/bug-bash/2012-02/msg00001.html

Bug-Description:

When `printf -v' is used to set an array element, the format string contains
`%b', and the corresponding argument is the empty string, the buffer used
to store the value to be assigned can be NULL, which results in NUL being
assigned to the array element.  This causes a seg fault when it's used later.

Patch (apply with `patch -p0'):

*** ../bash-4.2-patched/builtins/printf.def     2011-02-25 12:07:41.000000000 
-0500
--- builtins/printf.def 2012-02-02 08:37:12.000000000 -0500
***************
*** 256,259 ****
--- 257,262 ----
            {
              vflag = 1;
+             if (vbsize == 0)
+               vbuf = xmalloc (vbsize = 16);
              vblen = 0;
              if (vbuf)
*** ../bash-4.2-patched/patchlevel.h    Sat Jun 12 20:14:48 2010
--- patchlevel.h        Thu Feb 24 21:41:34 2011
***************
*** 26,30 ****
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 23
  
  #endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 24
  
  #endif /* _PATCHLEVEL_H_ */

-- 
``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    chet@case.edu    http://cnswww.cns.cwru.edu/~chet/