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Bash-4.3 Official Patch 9


From: Chet Ramey
Subject: Bash-4.3 Official Patch 9
Date: Sat, 12 Apr 2014 15:14:01 -0400

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

Bash-Release:   4.3
Patch-ID:       bash43-009

Bug-Reported-by:        Matthias Klose <address@hidden>
Bug-Reference-ID:       <address@hidden>
Bug-Reference-URL:      
http://lists.gnu.org/archive/html/bug-bash/2014-03/msg00171.html

Bug-Description:

There is a problem with unsigned sign extension when attempting to reallocate
the input line when it is fewer than 3 characters long and there has been a
history expansion.  The sign extension causes the shell to not reallocate the
line, which results in a segmentation fault when it writes past the end.

Patch (apply with `patch -p0'):

*** ../bash-4.3-patched/parse.y 2014-02-11 09:42:10.000000000 -0500
--- parse.y     2014-03-27 16:33:29.000000000 -0400
***************
*** 2425,2429 ****
        if (shell_input_line_terminator != EOF)
        {
!         if (shell_input_line_size < SIZE_MAX && shell_input_line_len > 
shell_input_line_size - 3)
            shell_input_line = (char *)xrealloc (shell_input_line,
                                        1 + (shell_input_line_size += 2));
--- 2425,2429 ----
        if (shell_input_line_terminator != EOF)
        {
!         if (shell_input_line_size < SIZE_MAX-3 && (shell_input_line_len+3 > 
shell_input_line_size))
            shell_input_line = (char *)xrealloc (shell_input_line,
                                        1 + (shell_input_line_size += 2));
*** ../bash-4.3-patched/y.tab.c 2014-03-28 11:17:06.000000000 -0400
--- y.tab.c     2014-04-07 11:48:31.000000000 -0400
***************
*** 4737,4741 ****
        if (shell_input_line_terminator != EOF)
        {
!         if (shell_input_line_size < SIZE_MAX && shell_input_line_len > 
shell_input_line_size - 3)
            shell_input_line = (char *)xrealloc (shell_input_line,
                                        1 + (shell_input_line_size += 2));
--- 4737,4741 ----
        if (shell_input_line_terminator != EOF)
        {
!         if (shell_input_line_size < SIZE_MAX-3 && (shell_input_line_len+3 > 
shell_input_line_size))
            shell_input_line = (char *)xrealloc (shell_input_line,
                                        1 + (shell_input_line_size += 2));
*** ../bash-4.3/patchlevel.h    2012-12-29 10:47:57.000000000 -0500
--- patchlevel.h        2014-03-20 20:01:28.000000000 -0400
***************
*** 26,30 ****
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 8
  
  #endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 9
  
  #endif /* _PATCHLEVEL_H_ */

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



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