Re: kern/49287: something wrong between exec_script and compat32

[David Holland <dholland-bugs%netbsd.org@localhost>]

The following reply was made to PR kern/49287; it has been noted by GNATS.

From: David Holland <dholland-bugs%netbsd.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/49287: something wrong between exec_script and compat32
Date: Thu, 23 Oct 2014 03:53:10 +0000

 On Thu, Oct 23, 2014 at 12:00:01AM +0000, David Holland wrote:
  >  I couldn't reproduce the crash, but I did get the corrupted argv. (I
  >  suspect the crash depends on exactly the right combination of
  >  circumstances.)
 
 ok, the argv is already broke by the time it gets to
 netbsd32_copyargs().
 
 Given printfs in the obvious places in there, I get
 
 exec32: arg: /argtest32
 exec32: arg: ./zy0
 exec32: arg: ENV=/root/.shrc
 exec32: arg: BLOCKSIZE=1k
 exec32: arg: PWD=/
 exec32: arg: HOME=/root
 exec32: arg: PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/pkg/sbin:/usr/pkg/bin:/usr/X11R7/bin:/usr/X11R6/bin:/usr/local/sbin:/usr/local/bin
 exec32: arg: HOST=
 exec32: arg: TERM=vt100
 exec32: arg: OLDPWD=/mnt
 exec32: arg: USER=root
 exec32: arg: LOGNAME=root
 exec32: arg: SHELL=/bin/sh
 exec32: env: ENV=/root/.shrc
 exec32: env: BLOCKSIZE=1k
 exec32: env: PWD=/
 exec32: env: HOME=/root
 exec32: env: PATH=/sbin:/usr/sbin:/bin:/usr/bin:/usr/pkg/sbin:/usr/pkg/bin:/usr/X11R7/bin:/usr/X11R6/bin:/usr/local/sbin:/usr/local/bin
 exec32: env: HOST=
 exec32: env: TERM=vt100
 exec32: env: OLDPWD=/mnt
 exec32: env: USER=root
 exec32: env: LOGNAME=root
 exec32: env: SHELL=/bin/sh
 
 where ./zy0 is the test script.
 
 -- 
 David A. Holland
 dholland%netbsd.org@localhost