This bug was fixed in the package util-linux - 2.33.1-0.1ubuntu2
---------------
util-linux (2.33.1-0.1ubuntu2) disco; urgency=medium
* debian/patches/32-bit-safe-mbr-parsing.patch: [PATCH] libfdisk:
(dos) Use strtoul to parse the label-id. Thanks to Juerg Haefliger
<juerg.haefli...@canonical.com>. LP: #1817302.
-- Steve Langasek <steve.langa...@ubuntu.com> Fri, 22 Feb 2019
21:46:00 +0100
** Changed in: util-linux (Ubuntu)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1817302
Title:
growpart changes diskid of mbr disks
Status in util-linux package in Ubuntu:
Fix Released
Bug description:
When growpart is run against a disk with a dos partition table, it
evidently changes the disk id in the MBR. This was noticed because
the diskid is part of the "PARTUUID" that is synthesized for DOS
partitions (unlike GPT, which has UUIDs for each partition as part of
the partition table).
This means that if someone is using root=PARTUUID=foo on the kernel
commandline, the cloud image will successfully boot exactly once, and
subsequently fail to boot because the partition uuid has changed.
I don't know at this point if this is a bug in cloud-utils or in
sfdisk (util-linux).
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