Date: Mon, 11 Jan 1999 23:54:43 -0500 (EST) From: Peter Philipp <pjp@bsd-daemon.net> To: freebsd-questions@FreeBSD.ORG Subject: XF86 3.3.3 and secure kernel level? Message-ID: <Pine.BSF.4.01.9901112333140.4234-100000@bsd-daemon.net>
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I've noticed that I can't (x)start XF86 3.3.3 which is distributed in the 2.2.8-RELEASE when my kernel secure level is > 0. If this has already been mentioned in -stable I apologize I'm not currently subscribed to that list (forwards of discussions there welcome). The problem I have noticed is the following... Fatal server error: xf86OpenConsole: KDENABIO failed (Operation not permitted) I've noticed on line 318 of /usr/X11R6/src/xc/programs/Xserver/hw/xfree86/os-support/bsd/bsd_init.c an ioctl to KDENABIO is attempted if the following is true: #if defined (SYSCONS_SUPPORT) || defined (PCVT_SUPPORT) case SYSCONS: case PCVT: ... further, the call does fail as I've tried to track down why and it seems in the kernel in /usr/src/sys/i386/isa/syscons.c on line 1813 as the ioctl for KDENABIO returns with EPERM (yup like above) if securelevel is higher than 0. case KDENABIO: /* allow io operations */ error = suser(p->p_ucred, &p->p_acflag); if (error != 0) return error; if (securelevel > 0) return EPERM; ... getting to the obvious questions, 1. What security implications would follow if the securelevel check was bypassed allowing KDENABIO in secure kernel levels? 2. Is there a workaround with xf86 3.3.3 that anyone knows of allowing higher secure kernel levels with X? 3. Is there anything obvious that I might have missed advising of this? sources and distribution all from 2.2.8-RELEASE as used in my environment. Peter Philipp (PP2441) Daemonic Networks "In theory, theory is the same as practice, but not in practice" - ??? To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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