From: dewar@merv.cs.nyu.edu (Robert Dewar)
Subject: Re: Runtime Error with gnat 3.10p
Date: 1998/05/27
Date: 1998-05-27T00:00:00+00:00 [thread overview]
Message-ID: <dewar.896294071@merv> (raw)
In-Reply-To: 356AF4B7.5EBF8617@cl.cam.ac.uk
<<Under Linux, the RM Annex D real-time task priorities can only be fully
implemented on top of POSIX.1c threads if the process is running with
root privileges. Otherwise, a malicious non-root process could lock-up
the entire system by requesting FIFO_Queuing and going into an
endless loop (in other words, you do not want full Annex D
compliance for normal untrusted users on a multi-user system).
>>
Annex D cannot be blamed here. it is perfectly possible to implement
full compliance with annex D without giving a proogram to seize the
system in this manner. Annex D talks about relationship of tasks
in your Ada program, not about their relation to other programs runningf
on the same operating system.
next prev parent reply other threads:[~1998-05-27 0:00 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-05-26 0:00 Runtime Error with gnat 3.10p Andreas Jungmaier
1998-05-26 0:00 ` David C. Hoos, Sr.
1998-05-26 0:00 ` Simon Wright
1998-05-26 0:00 ` Markus Kuhn
1998-05-27 0:00 ` Robert Dewar [this message]
1998-05-28 0:00 ` Larry Kilgallen
1998-05-28 0:00 ` Andi Kleen
1998-05-28 0:00 ` Markus Kuhn
1998-05-28 0:00 ` Andi Kleen
1998-05-28 0:00 ` Markus Kuhn
1998-06-01 0:00 ` CHARLET Arnaud
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