Date: Sun, 24 May 2009 23:10:32 GMT From: Andrzej Chabierski <bugger@langusta.net> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/134922: kernel panic when use fdisk on disk who been removed from gmirror Message-ID: <200905242310.n4ONAWDW065471@www.freebsd.org> Resent-Message-ID: <200905242320.n4ONK1dF020233@freefall.freebsd.org>
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>Number: 134922
>Category: kern
>Synopsis: kernel panic when use fdisk on disk who been removed from gmirror
>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 May 24 23:20:01 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator: Andrzej Chabierski
>Release: 7.2
>Organization:
>Environment:
FreeBSD bsdtest.outsider.pl 7.2-RELEASE FreeBSD 7.2-RELEASE #0: Fri May 1 08:49:13 UTC 2009 root@walker.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386
>Description:
~:>gmirror status
Name Status Components
mirror/gm0 COMPLETE ad4
ad6
~:>gmirror remove -v gm0 ad6
Done.
~:>gmirror status
Name Status Components
mirror/gm0 COMPLETE ad4
~:>fdisk -BI /dev/ad6
******* Working on device /dev/ad6 *******
fdisk: Geom not found: "ad6"
Now - one more time:
---
~:>fdisk -BI /dev/ad6
******* Working on device /dev/ad6 *******
---
and I get kernel panic.
On the console:
---
GEOM_LABEL: Label ufsid/4a0aa286db37b22c removed.
Fatal trap 12: page fault while in kernel mode
cpuid = 1; apic id = 01
fault virtual address = 0x14
fault code = supervisor read, page not present
instruction pointer = 0x20:0xc0788b33
stack pointer = 0x28:0xe571dc5c
frame pointer = 0x28:0xe571dc90
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, def32 1, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 2 (g_event)
trap number = 12
panic: page fault
cpuid = 1
Uptime: 20h32m28s
Physical memory: 2035 MB
Dumping 72 MB:ata2: FAILURE - oversized DMA transfer attempt 65536 > 32768
ad4: setting up DMA failed
** DUMP FAILED (ERROR 5) **
Automatic reboot in 15 seconds - press a key on the console to abort
Rebooting...
---
>How-To-Repeat:
1. remove disk from gmirror
2. run twice "fdisk -BI" on this disk
>Fix:
when
---
dd if=/dev/zero of=/dev/ad6 bs=1M count1
---
kernel not panic on the fdisk.
>Release-Note:
>Audit-Trail:
>Unformatted:
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