[Bug 2125535] Re: makeself archive failing md5sum validation [dd: partial write to slow reader]

[Mats Wichmann]

It's not necessarily "pretty" but you can temporarily switch back to
original coreutils, and then if you like back to uutils, after the vbox
stuff installed.  I believe there's a concise recipe for that somewhere,
I don't have it to hand.

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Title:
  makeself archive failing md5sum validation [dd: partial write to slow
  reader]

Status in Release Notes for Ubuntu:
  New
Status in coreutils-from package in Ubuntu:
  Confirmed
Status in makeself package in Ubuntu:
  Confirmed
Status in rust-coreutils package in Ubuntu:
  Triaged

Bug description:
  Still trying to find causes, but this sympton:

  for a 25.10 guest image, the virtualbox guest additions install
  (VBoxLinuxAdditions.run from the official ISO) fails checksum.  The
  Linux installer script is a makeself self-extracting archive (makeself
  is a Ubuntu package, though I don't know if the VirtualBox team uses
  Ubuntu to generate the archive). The output of trying to run this
  script is:

  # ./VBoxLinuxAdditions.run --noexec
  Verifying archive integritiy... 100% Error in MD5 checksums: c8ea742682d7024e581f916c763818c9 is different from 201ccc47587bb1c28745279e8b7fdd30

  The 201ccc signature is the one embedded in the script. On a 25.04
  system, there is no checksum complaint:

  # ./VBoxLinuxAdditions.run --noexec
  Verifying archive integrity...  100%   MD5 checksums are OK. All good.
  Uncompressing VirtualBox 7.2.2 Guest Additions for Linux  100%  

  I was sure this was due to the switchover of the waste-of-time
  coreutils rust rewrite (please ignore the editorial comment!)... but
  copying over coreutuils md5sum from 25.04 does not eliminate the
  error.

  Tar on both systems is 1.35.

  md5sum on today's (23 Sep) 25.10 reports: md5sum (uutils coreutils) 0.1.0
  on 25.04 where there's no failure it's: md5sum (GNU coreutils) 9.5
  but as noted, that exact binary moved to 25.10 to replace /usr/bin/md5sum does not improve matters there.

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