Public bug reported:
1. % lsb_release -rd
Description: Ubuntu 16.04.1 LTS
Release: 16.04
2. % apt-cache policy os-prober
os-prober:
Installed: 1.70ubuntu3
Candidate: 1.70ubuntu3
Version table:
*** 1.70ubuntu3 500
500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
100 /var/lib/dpkg/status
3. os-prober should skip over multipath partitions
4. os-prober only skips currently mounted partitions and ends up
mounting the same filesystem a second time with grub-mount; sometimes
this results in corrupt reads from /var/lib/os-
prober/<mount>/boot/grub/grub.cfg which results in undefined but broken
behavior
On multipath systems, you have two block devices pointing to the same
disk; when we create and mount a filesytem on one (/dev/sda1) we also
see the results on a second device (/dev/sdb1)
grub hooks to calling os-prober which checks /proc/mounts for mounted
partitions; it skips /dev/sda1, but when checking if /dev/sdb1 is
mounted, its not listed in /proc/mounts and then continues to call grub-
mount on /dev/sdb1; this uses grub-fuse to mount the disk a second time.
Even if multipath-tools and the module (dm-multipath) are not loaded, it
is possible to detect multipath by examining the FSUUID on the block
devices, blkid for example, will show that /dev/sda1 and /dev/sdb1 have
the same UUID.
There is a patch for skipping multipath but requires multipathd and the
dm-multipath module to be loaded.
https://build-test.opensuse.org/package/view_file/home:coolo:test/os-
prober/os-prober-skip-part-on-multipath.patch?expand=1
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: os-prober 1.70ubuntu3
ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35
Uname: Linux 4.4.0-59-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
ApportVersion: 2.20.1-0ubuntu2.4
Architecture: amd64
CurrentDesktop: GNOME-Flashback:GNOME
Date: Fri Jan 13 11:17:25 2017
Dependencies:
gcc-6-base 6.0.1-0ubuntu1
libc6 2.23-0ubuntu5
libgcc1 1:6.0.1-0ubuntu1
InstallationDate: Installed on 2016-01-01 (378 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20151209)
SourcePackage: os-prober
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: os-prober (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1656369
Title:
os-prober will double mount multipath partitions
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/os-prober/+bug/1656369/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
