Your message dated Mon, 01 May 2017 09:04:17 +0000
with message-id <e1d57fh-0004cr...@fasolo.debian.org>
and subject line Bug#860833: fixed in os-prober 1.75
has caused the Debian Bug report #860833,
regarding 50mounted-tests hangs at dmsetup when using biosgrub partition on a
left over fat32 partition
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
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immediately.)
--
860833: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=860833
Debian Bug Tracking System
Contact ow...@bugs.debian.org with problems
--- Begin Message ---
Package: os-prober
Version: 1.74
Severity: important
X-Debbugs-CC: cjwat...@debian.org, ivo.dedec...@ugent.be, pk...@debian.org
I'm using a recipe that includes this snippet:
1 1 1 free \
$iflabel{ gpt } \
$reusemethod{ } \
method{ biosgrub } \
This snippet is present in the following automated recipes:
http://sources.debian.net/src/partman-auto/137/recipes/multi/?hl=6#L6
<https://www.google.com/url?q=http://sources.debian.net/src/partman-auto/137/recipes/multi/?hl%3D6%23L6&sa=D&usg=AFQjCNHz7v1X9HhhtRNvxNgKv2X80dbSqg>
http://sources.debian.net/src/partman-auto/137/recipes/atomic/?hl=6#L6
<https://www.google.com/url?q=http://sources.debian.net/src/partman-auto/137/recipes/atomic/?hl%3D6%23L6&sa=D&usg=AFQjCNEz1U3zC3dJUBKJlFUErE-yIY12Uw>
http://sources.debian.net/src/partman-auto/137/recipes/home/?hl=6#L6
<https://www.google.com/url?q=http://sources.debian.net/src/partman-auto/137/recipes/home/?hl%3D6%23L6&sa=D&usg=AFQjCNHHzip0ACZMS-NFPms6nZcwhlkICg>
The biosgrub method does not touch the partition in any way. It leaves the
contents as is. If the installation is done in EFI mode, nothing is
written to this BIOS partition. Which means that if there happened to be a
fat32 partition that started on that sector (and was larger than 1 MB), the
fat32 bits are still there after partman has run, in a way that confuses
the lsblk command into thinking that the filesystem is "vfat"
This was always the case but it was not a problem with previous os-prober
versions because there was no dmsetup being executed. Now, with the new
dmsetup commands, this triggers problems because the mount point enters a
weird state.
This is the error in the log when it tries to mount the partition the first
time:
Apr 20 08:30:12 50mounted-tests: debug: mounting
/dev/mapper/osprober-linux-nvme0n1p1 (/dev/nvme0n1p1) as vfat failed:
mount: mounting /dev/mapper/osprober-linux-nvme0n1p1 on
/var/lib/os-prober/mount failed: Input/output error
The first time os-prober runs, it gets this error and it then claims to
have removed the device mapper entry. However, the next time os-prober
runs (for some reason, during one d-i session, it runs 4 times) it hangs
while running dmsetup create -r osprober-linux-nvme0n1p1
(http://sources.debian.net/src/os-prober/1.74/common.sh/?hl=223#L223)
This hangs completely and never ends, a possible workaround is to kill the
dmsetup command. After that, the next 2 os-prober runs detect that there's
a problem and don't hang.
I believe this is quite an important issue as any machine that has a
previously formatted vfat will completely hang while installing. Before you
claim no machine will have a previously formatted vfat: the affected
machine is a new "Non Windows" machine coming from HP with FreeDOS
installed.
After a lot of debugging with Philipp Kern, we were able to find out that
dmsetup was hanging on a udev cookie semaphore. The udev outside of the
chroot is compiled udev_sync, and it doesn't have dmsetup rules, so it
seems that it's not sending the dmsetup udevcomplete signal and thus
dmsetup hangs forever. Another possible workaround then is to send the
right dmsetup udevcomplete signal, and then installation proceeds.
It's not clear to me how the dmsetup code block would ever work without
proper udev support outside the chroot. It's also not clear why the first
time it fails sort of gracefully and then hangs very ungracefully the
second time.
--
Cheers,
Marga
--- End Message ---
--- Begin Message ---
Source: os-prober
Source-Version: 1.75
We believe that the bug you reported is fixed in the latest version of
os-prober, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to 860...@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Ivo De Decker <iv...@debian.org> (supplier of updated os-prober package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmas...@ftp-master.debian.org)
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
Format: 1.8
Date: Mon, 01 May 2017 09:55:33 +0200
Source: os-prober
Binary: os-prober-udeb os-prober
Architecture: source
Version: 1.75
Distribution: unstable
Urgency: medium
Maintainer: Debian Install System Team <debian-boot@lists.debian.org>
Changed-By: Ivo De Decker <iv...@debian.org>
Description:
os-prober - utility to detect other OSes on a set of drives
os-prober-udeb - utility to detect other OSes on a set of drives (udeb)
Closes: 853163 853927 860833
Changes:
os-prober (1.75) unstable; urgency=medium
.
* Remove code using device mapper (Closes: #860833, #853927, #853163).
This code doesn't work in d-i and it has some issues outside d-i. All
architectures can use the grub-mount codepath, which was already the
default anyway.
This also removes the dependency on dmsetup.
Checksums-Sha1:
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a8d0a562324bf2d1076426e0e482611f9ebe4d9b 26216 os-prober_1.75.tar.xz
Checksums-Sha256:
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os-prober_1.75.tar.xz
Files:
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os-prober_1.75.dsc
acf4f8818af3cee051aa6f927a451e55 26216 debian-installer optional
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