From owner-freebsd-bugs@FreeBSD.ORG Sun Aug 11 08:10:01 2013 Return-Path: Delivered-To: freebsd-bugs@smarthost.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 33D3F213 for ; Sun, 11 Aug 2013 08:10:01 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:1900:2254:206c::16:87]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 0BD1628A1 for ; Sun, 11 Aug 2013 08:10:01 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.7/8.14.7) with ESMTP id r7B8A0YV044168 for ; Sun, 11 Aug 2013 08:10:00 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.7/8.14.7/Submit) id r7B8A0hb044167; Sun, 11 Aug 2013 08:10:00 GMT (envelope-from gnats) Resent-Date: Sun, 11 Aug 2013 08:10:00 GMT Resent-Message-Id: <201308110810.r7B8A0hb044167@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Peter Jeremy Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id 08EE9ED for ; Sun, 11 Aug 2013 08:02:08 +0000 (UTC) (envelope-from peter@rulingia.com) Received: from vps.rulingia.com (host-122-100-2-194.octopus.com.au [122.100.2.194]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 96AF72880 for ; Sun, 11 Aug 2013 08:02:06 +0000 (UTC) Received: from server.rulingia.com (c220-239-237-213.belrs5.nsw.optusnet.com.au [220.239.237.213]) by vps.rulingia.com (8.14.5/8.14.5) with ESMTP id r7B7w3Ag014294 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Sun, 11 Aug 2013 17:58:04 +1000 (EST) (envelope-from peter@rulingia.com) Received: from server.rulingia.com (localhost.rulingia.com [127.0.0.1]) by server.rulingia.com (8.14.7/8.14.7) with ESMTP id r7B7vvLf087372 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Sun, 11 Aug 2013 17:57:57 +1000 (EST) (envelope-from peter@server.rulingia.com) Received: (from peter@localhost) by server.rulingia.com (8.14.7/8.14.7/Submit) id r7B7vu2L087371; Sun, 11 Aug 2013 17:57:56 +1000 (EST) (envelope-from peter) Message-Id: <201308110757.r7B7vu2L087371@server.rulingia.com> Date: Sun, 11 Aug 2013 17:57:56 +1000 (EST) From: Peter Jeremy To: FreeBSD-gnats-submit@freebsd.org X-Send-Pr-Version: 3.113 Subject: kern/181222: 8.4p2 panics during boot Cc: peter@server.rulingia.com X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list Reply-To: Peter Jeremy List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 11 Aug 2013 08:10:01 -0000 >Number: 181222 >Category: kern >Synopsis: 8.4p2 panics during boot >Confidential: no >Severity: serious >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sun Aug 11 08:10:00 UTC 2013 >Closed-Date: >Last-Modified: >Originator: Peter Jeremy >Release: FreeBSD 8.4RELEASE-p2 i386 >Organization: >Environment: System: FreeBSD fwall2.rulingia.com 8.4-RELEASE-p2 FreeBSD 8.4-RELEASE-p2 #0: Sun Aug 11 13:55:10 EST 2013 root@fwall2.rulingia.com:/var/obj/usr/src/8.4/sys/GENERIC i386 >Description: A GENERIC 8.4p2 kernel panics on my Campaq M700 P3-650 whilst running ata_identify(). The same system has no problems with 7.x or 8.3. I got the same panic running my custom kernel and built GENERIC to check it wasn't something I did. Photos of the panic are at https://plus.google.com/photos/106067987156035735826/albums/5910753509123036529 The relevant (hand-transcribed) bits are: Fatal trap 12: page fault while in kernel mode fault virtual address = 0xf0008277 fault code = supervisor read, page not present instruction pointer = 0x20:0xc057ddf4 ... #5 0xc0cf5edc at calltrap+0x6 #6 0xc0c57e00 at ata_boot_attach+0x70 #7 0xc09328ac at run_interrupt_driven_config_hooks+0x10c A disassembly of 0xc057ddf4 shows the problem is the arrowed expression. ata_identify(device_t dev) { struct ata_channel *ch = device_get_softc(dev); struct ata_device *atadev; device_t *children; device_t child, master = NULL; int nchildren, i, n = ch->devices; ^^^^^^^^^^^ The disk controller is a Intel PIIX4 with a single WD1600BEVE disk attached. >How-To-Repeat: Boot 8.4 on a Compaq M700. >Fix: Unknown. >Release-Note: >Audit-Trail: >Unformatted: