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[Launchpad Bug Tracker <1514141@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package systemd - 228-1ubuntu2

---------------
systemd (228-1ubuntu2) xenial; urgency=medium

  * Merge with Debian to fix FTBFS.

systemd (228-3) UNRELEASED; urgency=medium

  * debian/rules: Remove temporary debug output from test failures again. All
    Debian buildd kernels are recent enough now, but add a check for kernels
    older than 3.13 and ignore test failures for those.

systemd (228-2) unstable; urgency=medium

  * Remove wrong endianess conversion in test-siphash24 to fix FTBFS on
    big-endian machines.
  * Bump libseccomp-dev build dependency to indicate required versions for
    backporting to jessie. (Closes: #805497)

 -- Martin Pitt <martin.pitt@xxxxxxxxxx>  Thu, 19 Nov 2015 12:41:25
+0100

** Changed in: systemd (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1514141

Title:
  unprivileged user can freeze journald

Status in systemd package in Ubuntu:
  Fix Released

Bug description:
  On default installs of Ubuntu 15.10, both server and desktop, an
  unprivileged user can freeze journald using the attached program.
  (Journald is then eventually killed and restarted by systemd after a 1
  min timeout is detected - but nothing prevent the unprivileged user to
  DOS in a loop if he feels so inclined.)

  The reason is that journald uses inappropriate rules to decide if a
  file descriptor sent by a user is safe to read.

  [ IMO that such a "feature" (passing messages to log to journald by fd
  to regular files) exists at all should be questioned anyway, given the
  kind of impacts it can have on various aspects of the whole system
  (e.g.: the fd is completely read in a malloc'ed area, up to 750 MB) ]

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