Re: kern/44402: page fault in supervisor mode in netbsd:filt_piperead

[Krister Walfridsson <krister.walfridsson%gmail.com@localhost>]

The following reply was made to PR kern/44402; it has been noted by GNATS.

From: Krister Walfridsson <krister.walfridsson%gmail.com@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/44402: page fault in supervisor mode in netbsd:filt_piperead
Date: Mon, 18 Jul 2011 00:30:39 +0200 (CEST)

 I can still reproduce this with current NetBSD.
 
 I have also reproduced this on another machine (i386 current running in
 VMWare fusion configured as using two CPUs), although it takes much
 longer time for that one to panic ("a few hours" compared to "a few 
 minutes" on my development machine).
 
 I tried to reproduce this on a single-CPU machine without success.  But I
 only let the script run for ~1 hour, so I do not know if I were just 
 unlucky, or if you need a multiprocessor machine in order to trigger this 
 bug.
 
 I have not managed to create a small, simple, test program that triggers
 this bug.  But I have placed a tar-ball (PR44402.tgz) in ~kristerw at
 ftp.netbsd.org that contains everything needed to reproduce this.
 
     /Krister