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Date:      Sat, 25 Apr 1998 05:05:59 -0700
From:      David Greenman <dg@root.com>
To:        geoffr@globalserve.net
Cc:        questions@FreeBSD.ORG
Subject:   Re: What is signal 11? 
Message-ID:  <199804251205.FAA14935@implode.root.com>
In-Reply-To: Your message of "Sat, 25 Apr 1998 04:03:56 EDT." <354198EC.EFB2A79B@globalserve.net> 

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>I've been looking at my /var/log/messages log and I keep seeing these 
>same entries over and over again:
>
>Apr 23 06:03:28 datais /kernel: pid 17994 (checkc.cgi), uid 1001: exited on signal 11
>Apr 23 06:15:21 datais /kernel: pid 20978 (checkc.cgi), uid 1001: exited on signal 11
>Apr 23 06:15:58 datais /kernel: pid 21125 (checkc.cgi), uid 1001: exited on signal 11
>
>What is signal 11 and dose it indicate a problem with the CGI
>program checkc.cgi? I'm running FBSD 2.2.5R.

   A signal 11 is a "Segmentation Violation", which for x86 is actually a
reference to unmapped virtual memory - or in other words, an unresolvable
page fault. The most common cause is a programming error involving a bad
pointer dereference.

-DG

David Greenman
Co-founder/Principal Architect, The FreeBSD Project

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