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[Launchpad Bug Tracker <1577460@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package util-linux - 2.27.1-6ubuntu3.2

---------------
util-linux (2.27.1-6ubuntu3.2) xenial; urgency=medium

  * Cherrypick upstream fix to prevent segfaults in getopt by ensuring
    that options array is correctly terminated. LP: #1577460

 -- Dimitri John Ledkov <xnox@xxxxxxxxxx>  Fri, 16 Dec 2016 14:49:06
+0000

** Changed in: util-linux (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1577460

Title:
  mkinitramfs --help > Core dumped

Status in Ubuntu on IBM z Systems:
  Fix Committed
Status in glibc package in Ubuntu:
  Fix Released
Status in util-linux package in Ubuntu:
  Fix Released
Status in glibc source package in Xenial:
  Fix Released
Status in util-linux source package in Xenial:
  Fix Released
Status in glibc source package in Yakkety:
  Fix Released
Status in util-linux source package in Yakkety:
  Fix Committed

Bug description:
  [Testcase]
  * $ LC_ALL=fo_FOO.UTF-8 getopt -o c:d:ko:r:v -n /usr/sbin/mkinitramfs -- --help
  Expected result:
    /usr/sbin/mkinitramfs: unrecognized option '--help'
     --
    Exit code 1
  Current result:
    Segmentation fault
    Exit code 139.

  There are two bugs in play here. glibc bug was fixed, and util-linux
  bug needs an upload still.

  Problem Description
  ==============================
  root@zlin060:~# mkinitramfs --help
  Segmentation fault (core dumped)
  W: non-GNU getopt
  root@zlin060:~#

  == Comment: #9 - Heinz-Werner Seeck <heinz-werner_seeck@xxxxxxxxxx> - 2016-05-02 10:09:34 ==
  With Ubuntu 14.40 login via ssh:

  Following cmd :
  'getopt -o c:d:ko:r:v -n /usr/sbin/mkinitramfs -- --help'

  Following call-stack occured (creates coredump):

  #0  __strncmp_c (s1=0x2e6575634a500a6d <error: Cannot access memory at address 0x2e6575634a500a6d>,
      s1@entry=0x2e6575634a500a6a <error: Cannot access memory at address 0x2e6575634a500a6a>,
      s2=0x3fff7fff7ae "p", s2@entry=0x3fff7fff7ab "gelp", n=n@entry=4) at ../string/strncmp.c:44
  #1  0x000003ff7e9d4252 in _getopt_internal_r (argc=<optimized out>, argv=0x40,
      optstring=0x200000030 <error: Cannot access memory at address 0x200000030>, longopts=<optimized out>,
      longind=<optimized out>, long_only=0, d=0x3ff7ea8c330 <getopt_data>, posixly_correct=0) at getopt.c:546
  #2  0x000003ff7e9d51f2 in _getopt_internal (argc=<optimized out>, argv=<optimized out>,
      optstring=<optimized out>, longopts=<optimized out>, longind=0x3fff7ffe674, long_only=0, posixly_correct=0)
      at getopt.c:1175
  #3  0x000003ff7e9d52b6 in getopt_long (argc=<optimized out>, argv=<optimized out>, options=<optimized out>,
      long_options=<optimized out>, opt_index=0x3fff7ffe674) at getopt1.c:65
  #4  0x000002aa236821d8 in ?? ()
  #5  0x000002aa23681c22 in main ()

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