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From Fabio Lahr <fl...@idgsp.idg.com.br>
Subject general/4651: kernel panic running 32 or more copies of ApacheBench
Date Fri, 25 Jun 1999 15:24:58 GMT

>Number:         4651
>Category:       general
>Synopsis:       kernel panic running 32 or more copies of ApacheBench
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    apache
>State:          open
>Class:          sw-bug
>Submitter-Id:   apache
>Arrival-Date:   Fri Jun 25 08:30:01 PDT 1999
>Originator:     flahr@idgsp.idg.com.br
>Release:        Apache 1.3.4
Apache 1.3.4
Macintosh Blue G3/400 running MOSXS 
On Mac OS X
When 32 or more copies of ApacheBench (ab) are pointed at a CGI script on a website running
on Apache/Mac OS X Server machine, the kernel will panic, usually within 30-60 seconds, forcing
a reboot.
In the test, c't directed 32 copies of ApacheBench at the "test-cgi" script which is in /Local/Library/WebServer/CGI-Executables/.
By default, the script is not executable. You must 'chmod +x test-cgi' for it to work. However,
this could probably happen with any script, though tests of that sort were not published.

I actually tested this on my Blue G3/400 running MOSXS and did get a kernel panic. I got essentially
the same results whether launching the attack from the same machine that the webserver itself
is on, or launching the attack from a linux machine on the same network. Incidentally, I ran
this same test again a Red Hat Linux 5.1 (2.0.34 kernel) box, which did not experience any
problems during the "attack."
Has info on it
No but it seems to be related to Apache running on MOSX
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