[Bug 1885627] [NEW] sfdisk does not notice over-large partitions

[Kevin O'Gorman]

Public bug reported:

Call this a feature request.

I found that when I use the output of "sfdisk --dump" from one disk to
format another one that is smaller, sfdisk does not complain.  Of
course, using those partitions caused problems because they went off the
end of the new disk.  The error can be big or small -- manufacturers
vary in the exact sizes of disks over 80 GB or so, and a user may not
notice this condition is arising.

Sfdisk says it's intended for scripting.  Since testing for this is
tricky in scripts, I'd really like sfdisk to check for it.  Just notice
if a partition being created extends off the end of the actual volume
being formatted.  And do something about it to let the calling script
know.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: util-linux 2.31.1-0.4ubuntu3.6
ProcVersionSignature: Ubuntu 4.15.0-106.107-generic 4.15.18
Uname: Linux 4.15.0-106-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.9-0ubuntu7.15
Architecture: amd64
CurrentDesktop: XFCE
Date: Mon Jun 29 13:36:55 2020
SourcePackage: util-linux
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: util-linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic

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https://bugs.launchpad.net/bugs/1885627

Title:
  sfdisk does not notice over-large partitions

Status in util-linux package in Ubuntu:
  New

Bug description:
  Call this a feature request.

  I found that when I use the output of "sfdisk --dump" from one disk to
  format another one that is smaller, sfdisk does not complain.  Of
  course, using those partitions caused problems because they went off
  the end of the new disk.  The error can be big or small --
  manufacturers vary in the exact sizes of disks over 80 GB or so, and a
  user may not notice this condition is arising.

  Sfdisk says it's intended for scripting.  Since testing for this is
  tricky in scripts, I'd really like sfdisk to check for it.  Just
  notice if a partition being created extends off the end of the actual
  volume being formatted.  And do something about it to let the calling
  script know.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: util-linux 2.31.1-0.4ubuntu3.6
  ProcVersionSignature: Ubuntu 4.15.0-106.107-generic 4.15.18
  Uname: Linux 4.15.0-106-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.9-0ubuntu7.15
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Mon Jun 29 13:36:55 2020
  SourcePackage: util-linux
  UpgradeStatus: No upgrade log present (probably fresh install)

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