Date: Sun, 11 Aug 2013 17:57:56 +1000 (EST) From: Peter Jeremy <peterj@freebsd.org> To: FreeBSD-gnats-submit@freebsd.org Cc: peter@server.rulingia.com Subject: kern/181222: 8.4p2 panics during boot Message-ID: <201308110757.r7B7vu2L087371@server.rulingia.com> Resent-Message-ID: <201308110810.r7B8A0hb044167@freefall.freebsd.org>
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>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:
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