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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)

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