Date: Tue, 16 Oct 2007 20:35:44 GMT From: Oles Hnatkevych <don_oles@able.com.ua> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/117256: kgdb: cannot read PTD Message-ID: <200710162035.l9GKZiWU022839@www.freebsd.org> Resent-Message-ID: <200710162040.l9GKe1Pp016771@freefall.freebsd.org>
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>Number: 117256
>Category: kern
>Synopsis: kgdb: cannot read PTD
>Confidential: no
>Severity: serious
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Oct 16 20:40:01 UTC 2007
>Closed-Date:
>Last-Modified:
>Originator: Oles Hnatkevych
>Release: 6.2-STABLE
>Organization:
>Environment:
FreeBSD murzik.oles.net 6.2-STABLE FreeBSD 6.2-STABLE #2: Mon Oct 15 16:10:24 EEST 2007 root@murzik.oles.net:/usr/src/sys/i386/compile/MURZIK i386
>Description:
I have box crashing when using fusefs ntfs module. But the problem is that kgdb can not read coredump:
murzik:root# kgdb kernel.debug /var/crash/vmcore.0
kgdb: cannot read PTD
murzik:root# more info.0
Dump header from device /dev/ad0s1b
Architecture: i386
Architecture Version: 2
Dump Length: 1610158080B (1535 MB)
Blocksize: 512
Dumptime: Tue Oct 16 23:08:55 2007
Hostname: murzik.oles.net
Magic: FreeBSD Kernel Dump
Version String: FreeBSD 6.2-STABLE #2: Mon Oct 15 16:10:24 EEST 2007
root@murzik.oles.net:/usr/src/sys/i386/compile/MURZIK
Panic String: page fault
Dump Parity: 626449165
Bounds: 0
Dump Status: good
murzik:root# file vmcore.0
vmcore.0: ELF 32-bit LSB core file Intel 80386, invalid version (embedded)
If we can not debug the kernel we can not fix crash bugs!
>How-To-Repeat:
mount_ntfs-3g /dev/da0s1 /mnt
cd /mnt
mv some-file /root/
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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