Bug#235392: marked as done (lvm2: Segmentation Fault when finding non-existant label)
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Date: Sat, 28 Feb 2004 22:06:28 -0500
From: "Derrick 'dman' Hudson" <dman@dman13.dyndns.org>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: lvm2: Segmentation Fault when finding non-existant label
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Package: lvm2
Version: 2.00.08-4
Severity: important
A long time ago, when I first started using lvm, I experimented with
creating volume groups until I understood what was going on. One of
the groups I created was called 'volume1', but it was removed shortly
afterward. This hasn't been a problem (kernel 2.4 with lvm1) apart
=66rom some extra noise every now and then.
However, I just upgraded to lvm2 so I can use kernel 2.6 and vgscan
and vgchange segfault. This means that during bootup, my LVM mounts
aren't mounted and I am instead prompted to log in as root and perform
emergency maintencance. Interactively I discovered that although
vgscan segfaults, it still set all the necessary state and that if
given a specific volume name then vgchange would not crash. Armed
with this workaround, I modified the initscript to ignore errors from
vgscan and specify the volume group name to vgchange. This allows the
boot sequence to complete with no errors.
If I run vgscan now, on the running system, I don't get the crash but
I get the following output :
# vgscan=20
vgscan Reading all physical volumes. This may take a while...
vgscan Found volume group "VolumeGroup0" using metadata type lvm2
vgscan Out of memory. Requested 1011089428 bytes.
vgscan Failed to read extents from /dev/ide/host0/bus1/target0/lun0/di=
sc
vgscan Out of memory. Requested 1011089428 bytes.
vgscan Failed to read extents from /dev/ide/host0/bus1/target0/lun0/di=
sc
vgscan Volume group "volume1" not found
Volume group "volume1" is the group that doesn't exist. Group
"VolumeGroup0" is the actual vg.
You can find the core file created last night while I discovered the
above-mentioned workaround in the "emergency" shell at
http://dman13.dyndns.org/core.vgscan.2004-02-27. (be aware, though -
this file appears to really be 100M even though 'du -h' and 'ls -s'
report it as 400K)
On a side note, where does lvm keep finding the 'volume1' label and
how can I get rid of this label for a non-existant volume?
-D
-- System Information:
Debian Release: testing/unstable
APT prefers testing
APT policy: (990, 'testing'), (80, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.6.3-1-k7
Locale: LANG=3Den_US.UTF-8, LC_CTYPE=3Den_US.UTF-8
Versions of packages lvm2 depends on:
ii libc6 2.3.2.ds1-11 GNU C Library: Shared librarie=
s an
ii libdevmapper1.00 2:1.00.07-4 The Linux Kernel Device Mapper=
use
ii lvm-common 1.5.11 The Logical Volume Manager for=
Lin
-- no debconf information
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Date: Thu, 7 Jul 2005 22:06:29 -0400
From: Derrick Hudson <dman@dman13.dyndns.org>
To: Andres Salomon <dilinger@debian.org>,
235392-quiet@bugs.debian.org
Cc: 235392-done@bugs.debian.org
Subject: Re: Bug#235392: lvm2: Segmentation Fault when finding non-existant label
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On Tue, Apr 26, 2005 at 06:26:39AM -0400, Andres Salomon wrote:
| Hi,
|=20
| Could you please try the latest lvm2 utils, and let me know whether this
| bug still occurs?
Sorry it has taken me so long to reply to this.
I'm closing this bug report for you because I can not reproduce this
now. The disk I experienced the problem with began to fail and was
replaced with a new disk, surely invalidating any test I can do now.
In any event no one else has reported experiencing this problem and
its not a problem for me now so I see no need to keep the report open.
HAND,
-D
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