BASH PATCH REPORT

			     =================

Bash-Release:	4.3

Patch-ID:	bash43-009

Bug-Reported-by:	Matthias Klose <doko@debian.org>

Bug-Reference-ID:	<53346FC8.6090005@debian.org>

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_ */