[Bug 1313550] Re: ping does not work as a normal user on trusty tarball cloud images.

[Serge Hallyn]

Quoting Scott Moser (smoser at ubuntu.com):
> Serge,
>   I don't see why new files would make something non-SRU-able.

A new file by itself would be nice as it's self-contained.  It's
particularly adding the new calls that would seem protentially
problematic.

Anyway if it seems sane I'll post a debdiff at some point hopefully
tomorrow.  But given the importance of tar in general (meaning, if
there were regressions in 1.27 in trusty we would know about them)
I think backporting 1.27 to precise seems more sane than cherrypicking
something very intrusive and hoping we don't get weird side effects
or subtle bugs.

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https://bugs.launchpad.net/bugs/1313550

Title:
  ping does not work as a normal user on trusty tarball cloud images.

Status in The curt installer:
  Confirmed
Status in MAAS:
  Confirmed
Status in “curtin” package in Ubuntu:
  Confirmed
Status in “iputils” package in Ubuntu:
  Confirmed
Status in “lxc” package in Ubuntu:
  Confirmed
Status in “maas” package in Ubuntu:
  Confirmed
Status in “tar” package in Ubuntu:
  Fix Released
Status in “lxc” source package in Precise:
  Confirmed
Status in “tar” source package in Precise:
  Confirmed
Status in “curtin” source package in Saucy:
  Confirmed
Status in “lxc” source package in Saucy:
  Confirmed
Status in “maas” source package in Saucy:
  Confirmed
Status in “tar” source package in Saucy:
  Confirmed
Status in “curtin” source package in Trusty:
  Confirmed
Status in “lxc” source package in Trusty:
  Confirmed
Status in “maas” source package in Trusty:
  Confirmed
Status in “tar” source package in Trusty:
  Fix Released

Bug description:
  With trusty, /bin/ping relies on having extended attributes and kernel
  capabilities to gain the cap_net_raw+p capability. This allows
  removing the suid bit.

  However, the tarball cloud images do not preserve the extended
  attributes, and thus /bin/ping does not work on a system derived from
  them.

  Summary of problem per package:
   * lxc: ubuntu cloud template needs to extract
   * download template needs to extract with xattr flags
   * server side download creation tools need xattr flags
   * [unconfirmed] tarball caches need creation and extraction with xattr flags
   * tar: need the '--xattr' and '--acl' flags backported
   * maas: uec2roottgz needs to use xattr/acl flags 
   * curtin: extraction needs to use xattr/acl flags.
   * cloud-image-build: needs to create -root.tar.gz with xattr/acl flags

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