From:	 Rob Landley <landley@trommello.org>
To:	 linux-kernel@vger.kernel.org
Subject: Security question: "Text file busy" overwriting executables but not shared libraries?
Date:	 Tue, 2 Oct 2001 22:55:02 -0400

Anybody want to venture an opinion why overwriting executable files that are 
currently in use gives you a "text file busy" error, but overwriting shared 
libraries that are in use apparently works just fine (modulo a core dump if 
you aren't subtle about your run-time patching)?

Permissions are still enforced, but it seems to me somebody who cracks root 
on a system could potentially modify the behavior of important system daemons 
without changing their process ID numbers.

Did I miss something somewhere?

Rob
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