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Date: Mon, 17 Jul 2000 11:34:58 -0700 (PDT)
From: pfeifer@dbai.tuwien.ac.at
To: freebsd-gnats-submit@FreeBSD.org
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Subject: bin/19983: sh dumps core reproducibly
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>Number:         19983
>Category:       bin
>Synopsis:       sh dumps core reproducibly
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jul 17 11:40:01 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     Gerald Pfeifer
>Release:        4.0-RELEASE
>Organization:
>Environment:
FreeBSD taygeta.dbai.tuwien.ac.at 4.0-RELEASE FreeBSD 4.0-RELEASE #0: Wed Jul 12 21:20:37 CEST 2000
root@taygeta.dbai.tuwien.ac.at:/usr/src/sys/compile/GERALD_MADE_4.0  i386
>Description:
I consistently get the following core dump from /bin/sh for the script
listed under "How to repeat":

  sh in free(): warning: junk pointer, too low to make sense.
  Segmentation fault

I tested this on two 4.0-RELEASE boxes. Another box, running 3.4-RELEASE
aborts a bit differently.

  sh in free(): warning: junk pointer, too low to make sense.
  Oops, stackp deleted
  Abort trap

>How-To-Repeat:
Run the script below in a large directory tree (which is not necessarily
a CVS tree) like /usr/share. After about 12 directories the segmentation
fault happens.

Nearly any modification of this script -- even removing some parameters
of the cvs command! -- makes the problem go away!

---- cut ----
#!/bin/sh

find `pwd` -type d -exec echo {} \; |
    while read name; do
        dir=`dirname $name`
        if [ -d $dir ]; then
            echo "Updating $dir"

            visited="$visited:$dir"

            cd $dir
            cvs -q update -PAd -l
        fi
    done

>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted:


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