From owner-freebsd-hackers Tue Dec 23 12:50:28 1997 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.7/8.8.7) id MAA06940 for hackers-outgoing; Tue, 23 Dec 1997 12:50:28 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from sax.sax.de (sax.sax.de [193.175.26.33]) by hub.freebsd.org (8.8.7/8.8.7) with ESMTP id MAA06884 for ; Tue, 23 Dec 1997 12:50:14 -0800 (PST) (envelope-from j@uriah.heep.sax.de) Received: (from uucp@localhost) by sax.sax.de (8.8.8/8.8.8) with UUCP id VAA03387; Tue, 23 Dec 1997 21:50:02 +0100 (CET) (envelope-from j@uriah.heep.sax.de) Received: (from j@localhost) by uriah.heep.sax.de (8.8.8/8.8.5) id VAA13954; Tue, 23 Dec 1997 21:42:29 +0100 (MET) Date: Tue, 23 Dec 1997 21:42:29 +0100 (MET) Message-Id: <199712232042.VAA13954@uriah.heep.sax.de> Mime-Version: 1.0 X-Newsreader: knews 0.9.8 Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) Organization: Private BSD site, Dresden X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E References: <349EBC3F.8F03755E@pr-comm.com> From: j@uriah.heep.sax.de (J Wunsch) Subject: Re: Crash installing over a lp network X-Original-Newsgroups: local.freebsd.hackers To: freebsd-hackers@FreeBSD.ORG cc: "James E. Housley" Content-Type: text/plain; charset=us-ascii Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk "James E. Housley" wrote: > Some time after Dec 4 I started geting page fauls when installing a new > system to my laptop via the lp interface. It usually makes it through > include but not always. The last one failed the AM with src-2.2.0548 > patches. This is the screen: > > fault trap 12: page fault while in kernel mode > fault virtual address = 0x10 > fault code = supervisor read, page not present > instruction pointer = 0x8:0xf012c325 > What is my next step? Well, posting the entire config file wasn't that useful (in particular posting all the commented out lines). What's really important is: nm /kernel | sort | more -e ....and lookup the symbol that's next before address 0xf012c325. This tells you the function it was crashing in. Fault VA 0x10 looks like dereferencing a structure member where the struct pointer is a null pointer. Please, see also the handbook's section about kernel debugging. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)