Bug 2041498

Summary:	incorrect partition size calculation for BLKPG_* ioctls
Product:	Red Hat Enterprise Linux 8	Reporter:	Karel Zak <kzak>
Component:	util-linux	Assignee:	Karel Zak <kzak>
Status:	CLOSED ERRATA	QA Contact:	Radka Brychtova <rskvaril>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	8.5	CC:	rskvaril
Target Milestone:	rc	Keywords:	Triaged
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
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Fixed In Version:	util-linux-2.32.1-32.el8	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-05-10 15:30:52 UTC	Type:	Bug
Regression:	---	Mount Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Karel Zak 2022-01-17 14:12:44 UTC

Description of problem:

libfdisk incorrectly calculates partition size for BLKPG_* ioctls, kernel assumes 512-byte 
sectors, but libfdisk uses real sectors. This problem is already fixed in the upstream tree.

We need to backport commits:

33f50706fd7c1c5e53f8f355f12b685c6935f5a4
libfdisk: fix fdisk_reread_changes() for extended partitions

6a4d53ce6466fc97c0ee13846cd1bf7bdd7bfef0
libfdisk: fix partition calculation for BLKPG_* ioctls

Note that fdisk uses BLKPG_* ioctl only if the device is in use, otherwise it uses BLKRRPART which is not affected by this bug. So, a possible workaround is to keep the device unused (lvm, dm, mount any fs, etc...) when you call fdisk, or reboot your system after the fdisk "w" command.

(References: bug #2016229)

Comment 10 errata-xmlrpc 2022-05-10 15:30:52 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (util-linux bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2022:2100