Date: Fri, 15 Oct 1999 00:39:36 -0400 (EDT) From: Mike Nowlin <mike@argos.org> To: "Rashid N. Achilov" <shelton@sentry.granch.ru> Cc: freebsd-security@FreeBSD.ORG Subject: Re: kern.securelevel and X Message-ID: <Pine.LNX.4.05.9910150036170.5339-100000@jason.argos.org> In-Reply-To: <XFMail.991015111802.shelton@sentry.granch.ru>
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> Why I can't start X with kern.securelevel more than -1? > > When I attempt start X with kern.securelevel 1 or 2, startx crashed with > "KBENBIO (or like that): Operation not permitted" It's been a while since I read something about this, but let's see how good my memory is -- corrections welcomed.... :) When running with a >0 securelevel, X can't access the video memory due to security restrictions (probably something about letting a non-kernel process access any kind of I/O or memory port directly), so the X server can't talk to the video card -- boom. Am I right? mike To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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