[Bug 1334616] [NEW] Try harder to make sure that kernel output is world-readable

[Colin Watson]

Public bug reported:

https://launchpad.net/~ubuntu-cdimage/+livefs/ubuntu/precise/ubuntu-zh-
cn currently fails and is disabled.  You can't see the failure in the
logs (partly because it's only visible in the launchpad-buildd slave
log, and partly because those builds were retried and then cancelled
before they failed again), but it's as follows:

2014-06-23 12:39:25+0000 [-] Build log: P: Begin unmounting filesystems...
2014-06-23 12:39:25+0000 [-] Iterating with success flag 0 against stage BUILD_LIVEFS
2014-06-23 12:39:28+0000 [-] unexpected error in processEnded
        Traceback (most recent call last):
          File "/usr/lib/python2.7/dist-packages/twisted/internet/process.py", line 916, in maybeCallProcessEnded
            self.reapProcess()
          File "/usr/lib/python2.7/dist-packages/twisted/internet/process.py", line 312, in reapProcess
            self.processEnded(status)
          File "/usr/lib/python2.7/dist-packages/twisted/internet/_baseprocess.py", line 48, in processEnded
            self.maybeCallProcessEnded()
          File "/usr/lib/python2.7/dist-packages/twisted/internet/process.py", line 918, in maybeCallProcessEnded
            _BaseProcess.maybeCallProcessEnded(self)
        --- <exception caught here> ---
          File "/usr/lib/python2.7/dist-packages/twisted/internet/_baseprocess.py", line 60, in maybeCallProcessEnded
            proto.processEnded(Failure(reason))
          File "/usr/lib/launchpad-buildd/lpbuildd/slave.py", line 93, in processEnded
            self.notify(statusobject.value.exitCode)
          File "/usr/lib/launchpad-buildd/lpbuildd/debian.py", line 128, in iterate
            func(success)
          File "/usr/lib/launchpad-buildd/lpbuildd/livefs.py", line 80, in iterate_BUILD_LIVEFS
            self.gatherResults()
          File "/usr/lib/launchpad-buildd/lpbuildd/livefs.py", line 105, in gatherResults
            self._slave.addWaitingFile(path)
          File "/usr/lib/launchpad-buildd/lpbuildd/slave.py", line 409, in addWaitingFile
            self.waitingfiles[os.path.basename(path)] = self.storeFile(path)
          File "/usr/lib/launchpad-buildd/lpbuildd/slave.py", line 388, in storeFile
            f = open(path)
        exceptions.IOError: [Errno 13] Permission denied: '/home/buildd/build-LIVEFSBUILD-56/chroot-autobuild/build/livecd.ubuntu.kernel'

We apply an explicit chmod in a few other cases, but we're missing some.

For SRU verification, it should be sufficient to confirm that the livefs
above can now be built in Launchpad.

** Affects: livecd-rootfs (Ubuntu)
     Importance: High
     Assignee: Colin Watson (cjwatson)
         Status: New

** Affects: livecd-rootfs (Ubuntu Precise)
     Importance: High
     Assignee: Colin Watson (cjwatson)
         Status: In Progress

** Also affects: livecd-rootfs (Ubuntu Precise)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1334616

Title:
  Try harder to make sure that kernel output is world-readable

Status in “livecd-rootfs” package in Ubuntu:
  New
Status in “livecd-rootfs” source package in Precise:
  In Progress

Bug description:
  https://launchpad.net/~ubuntu-cdimage/+livefs/ubuntu/precise/ubuntu-
  zh-cn currently fails and is disabled.  You can't see the failure in
  the logs (partly because it's only visible in the launchpad-buildd
  slave log, and partly because those builds were retried and then
  cancelled before they failed again), but it's as follows:

  2014-06-23 12:39:25+0000 [-] Build log: P: Begin unmounting filesystems...
  2014-06-23 12:39:25+0000 [-] Iterating with success flag 0 against stage BUILD_LIVEFS
  2014-06-23 12:39:28+0000 [-] unexpected error in processEnded
          Traceback (most recent call last):
            File "/usr/lib/python2.7/dist-packages/twisted/internet/process.py", line 916, in maybeCallProcessEnded
              self.reapProcess()
            File "/usr/lib/python2.7/dist-packages/twisted/internet/process.py", line 312, in reapProcess
              self.processEnded(status)
            File "/usr/lib/python2.7/dist-packages/twisted/internet/_baseprocess.py", line 48, in processEnded
              self.maybeCallProcessEnded()
            File "/usr/lib/python2.7/dist-packages/twisted/internet/process.py", line 918, in maybeCallProcessEnded
              _BaseProcess.maybeCallProcessEnded(self)
          --- <exception caught here> ---
            File "/usr/lib/python2.7/dist-packages/twisted/internet/_baseprocess.py", line 60, in maybeCallProcessEnded
              proto.processEnded(Failure(reason))
            File "/usr/lib/launchpad-buildd/lpbuildd/slave.py", line 93, in processEnded
              self.notify(statusobject.value.exitCode)
            File "/usr/lib/launchpad-buildd/lpbuildd/debian.py", line 128, in iterate
              func(success)
            File "/usr/lib/launchpad-buildd/lpbuildd/livefs.py", line 80, in iterate_BUILD_LIVEFS
              self.gatherResults()
            File "/usr/lib/launchpad-buildd/lpbuildd/livefs.py", line 105, in gatherResults
              self._slave.addWaitingFile(path)
            File "/usr/lib/launchpad-buildd/lpbuildd/slave.py", line 409, in addWaitingFile
              self.waitingfiles[os.path.basename(path)] = self.storeFile(path)
            File "/usr/lib/launchpad-buildd/lpbuildd/slave.py", line 388, in storeFile
              f = open(path)
          exceptions.IOError: [Errno 13] Permission denied: '/home/buildd/build-LIVEFSBUILD-56/chroot-autobuild/build/livecd.ubuntu.kernel'

  We apply an explicit chmod in a few other cases, but we're missing
  some.

  For SRU verification, it should be sufficient to confirm that the
  livefs above can now be built in Launchpad.

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