[Bug 1545884] [NEW] Xenial's shadow regresses subid allocation logic (wastes uids and gids)

[Stéphane Graber]

Public bug reported:

Back in trusty I wrote a patch to shadow which makes sure we only ever
allocate a 65k uid/gid map to new users that aren't a system user (no
--system flag and not a system uid/gid).

This has regressed recently in Xenial and on a fresh install I found
myself with about 15 system users each having 65536 uids and gids
allocated to them. That's wasteful and may end up creating accidental
collisions when using network authentication.

I have now upstreamed the change we used to have as a distro patch:
   https://github.com/shadow-maint/shadow/pull/12

** Affects: shadow (Ubuntu)
     Importance: High
         Status: Triaged


** Tags: regression-release

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https://bugs.launchpad.net/bugs/1545884

Title:
  Xenial's shadow regresses subid allocation logic (wastes uids and
  gids)

Status in shadow package in Ubuntu:
  Triaged

Bug description:
  Back in trusty I wrote a patch to shadow which makes sure we only ever
  allocate a 65k uid/gid map to new users that aren't a system user (no
  --system flag and not a system uid/gid).

  This has regressed recently in Xenial and on a fresh install I found
  myself with about 15 system users each having 65536 uids and gids
  allocated to them. That's wasteful and may end up creating accidental
  collisions when using network authentication.

  I have now upstreamed the change we used to have as a distro patch:
     https://github.com/shadow-maint/shadow/pull/12

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