BASH PATCH REPORT

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

Bash-Release:	4.4

Patch-ID:	bash44-006

Bug-Reported-by:	<[email protected]>

Bug-Reference-ID:	<CAEr-gPFPvqheiAeENmMkEwWRd4U=1iqCsYmR3sLdULOqL++_tQ@mail.gmail.com>

Bug-Reference-URL:	

Bug-Description:

Out-of-range negative offsets to popd can cause the shell to crash attempting

to free an invalid memory block.

Patch (apply with `patch -p0'):

*** ../bash-4.4-patched/builtins/pushd.def	2016-01-25 13:31:49.000000000 -0500

--- builtins/pushd.def	2016-10-28 10:46:49.000000000 -0400

***************

*** 366,370 ****

      }

!   if (which > directory_list_offset || (directory_list_offset == 0 && which == 0))

      {

        pushd_error (directory_list_offset, which_word ? which_word : "");

--- 366,370 ----

      }

!   if (which > directory_list_offset || (which < -directory_list_offset) || (directory_list_offset == 0 && which == 0))

      {

        pushd_error (directory_list_offset, which_word ? which_word : "");

***************

*** 388,391 ****

--- 388,396 ----

  	 of the list into place. */

        i = (direction == '+') ? directory_list_offset - which : which;

+       if (i < 0 || i > directory_list_offset)

+ 	{

+ 	  pushd_error (directory_list_offset, which_word ? which_word : "");

+ 	  return (EXECUTION_FAILURE);

+ 	}

        free (pushd_directory_list[i]);

        directory_list_offset--;

*** ../bash-4.4/patchlevel.h	2016-06-22 14:51:03.000000000 -0400

--- patchlevel.h	2016-10-01 11:01:28.000000000 -0400

***************

*** 26,30 ****

     looks for to find the patch level (for the sccs version string). */

! #define PATCHLEVEL 5

  #endif /* _PATCHLEVEL_H_ */

--- 26,30 ----

     looks for to find the patch level (for the sccs version string). */

! #define PATCHLEVEL 6

  #endif /* _PATCHLEVEL_H_ */