[Bug 217547] The shell example in time_namespaces doesn't behave as documented

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=217547

Thomas Weißschuh (kernel@t-8ch.de) changed:

           What    |Removed                     |Added
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                 CC|                            |kernel@t-8ch.de

--- Comment #1 from Thomas Weißschuh (kernel@t-8ch.de) ---
It seems in commit 2b5f9dad32ed ("fs/exec: switch timens when a task gets a new
mm") 
the time namespace is frozen on exec().

begin_new_exec()
  exec_task_namespaces()
    timens_on_fork()
      timens_commit()
        timens_set_vvar_page()
          ns->frozen_offsets = true

As a workaround you could use "unshare -T --monotonic $((2*24*60*60))" to let
unshare set the offsets directly.

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