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Bash-4.2 Official Patch 22


From: Chet Ramey
Subject: Bash-4.2 Official Patch 22
Date: Mon, 12 Mar 2012 15:47:47 -0400

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

Bash-Release:   4.2
Patch-ID:       bash42-022

Bug-Reported-by:        Gregory Margo <address@hidden>
Bug-Reference-ID:       <address@hidden>
Bug-Reference-URL:      
http://lists.gnu.org/archive/html/bug-bash/2011-07/msg00102.html

Bug-Description:

The return value from lseek is `off_t'.  This can cause corrupted return
values when the file offset is greater than 2**31 - 1.

Patch (apply with `patch -p0'):

*** ../bash-4.2-patched/lib/sh/zread.c  Mon Mar  2 08:54:45 2009
--- lib/sh/zread.c      Thu Jul 28 18:16:53 2011
***************
*** 161,166 ****
       int fd;
  {
!   off_t off;
!   int r;
  
    off = lused - lind;
--- 161,165 ----
       int fd;
  {
!   off_t off, r;
  
    off = lused - lind;
***************
*** 169,173 ****
      r = lseek (fd, -off, SEEK_CUR);
  
!   if (r >= 0)
      lused = lind = 0;
  }
--- 168,172 ----
      r = lseek (fd, -off, SEEK_CUR);
  
!   if (r != -1)
      lused = lind = 0;
  }
*** ../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 21
  
  #endif /* _PATCHLEVEL_H_ */
--- 26,30 ----
     looks for to find the patch level (for the sccs version string). */
  
! #define PATCHLEVEL 22
  
  #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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