group.of.nepali.translators team mailing list archive

[Seth Forshee <seth.forshee+lp@xxxxxxxxxxxxx>]

Public bug reported:

SRU Justification

Impact: Support for using filesystem capabilities in unprivileged user
namespaces was added upstream in Linux 4.14. This is a useful feature
that allows unprivileged containers to set fscaps that are valid only in
user namespaces where a specific kuid is mapped to root. This allows for
e.g. support for Linux distros within lxd which make use of filesystem
capabilities.

Fix: Backport upstream commit 8db6c34f1dbc "Introduce v3 namespaced file
capabilities" and any subsequent fixes to xenial 4.4.

Test Case: Test use of fscaps within a lxd container.

Regression Potential: This has been upstream since 4.14 (and thus is
present in bionic), and the backport to xenial 4.4 was straightforward,
so regression potential is low.

** Affects: linux (Ubuntu)
     Importance: Medium
     Assignee: Seth Forshee (sforshee)
         Status: Fix Released

** Affects: linux (Ubuntu Xenial)
     Importance: Medium
     Assignee: Seth Forshee (sforshee)
         Status: In Progress

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Xenial)
   Importance: Undecided => Medium

** Changed in: linux (Ubuntu Xenial)
       Status: New => In Progress

** Changed in: linux (Ubuntu Xenial)
     Assignee: (unassigned) => Seth Forshee (sforshee)

** Changed in: linux (Ubuntu)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1778286

Title:
  Backport namespaced fscaps to xenial 4.4

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  In Progress

Bug description:
  SRU Justification

  Impact: Support for using filesystem capabilities in unprivileged user
  namespaces was added upstream in Linux 4.14. This is a useful feature
  that allows unprivileged containers to set fscaps that are valid only
  in user namespaces where a specific kuid is mapped to root. This
  allows for e.g. support for Linux distros within lxd which make use of
  filesystem capabilities.

  Fix: Backport upstream commit 8db6c34f1dbc "Introduce v3 namespaced
  file capabilities" and any subsequent fixes to xenial 4.4.

  Test Case: Test use of fscaps within a lxd container.

  Regression Potential: This has been upstream since 4.14 (and thus is
  present in bionic), and the backport to xenial 4.4 was
  straightforward, so regression potential is low.

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