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[Bug 1600000] Re: libnss-resolve treats two trailing dots on a domain name incorrectly

 

This bug was fixed in the package systemd - 231-6

---------------
systemd (231-6) unstable; urgency=medium

  [ Martin Pitt ]
  * Add alternative iptables-dev build dependencies
    libiptc-dev is very new and not yet present in stable Debian/Ubuntu releases.
    Add it as a fallback build dependency for backports and upstream tests.
  * Detect if seccomp is enabled but seccomp filtering is disabled
    (Closes: #832713)
  * resolved: recognize DNS names with more than one trailing dot as invalid
    (LP: #1600000)
  * debian/tests/smoke: Store udev db dump artifact on failure
  * networkd: limit the number of routes to the kernel limit
  * systemctl: consider service running only when it is in active or reloading state
  * networkd: remove route if carrier is lost
  * Add Ref()/Unref() bus calls for units

  [ Felipe Sateler ]
  * git-cherry-pick: always recreate the patch-queue branch.

  [ Dimitri John Ledkov ]
  * Use idiomatic variables from dpkg include.

 -- Martin Pitt <martin.pitt@xxxxxxxxxx>  Sun, 11 Sep 2016 15:00:55
+0200

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

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https://bugs.launchpad.net/bugs/1600000

Title:
  libnss-resolve treats two trailing dots on a domain name incorrectly

Status in systemd:
  New
Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Xenial:
  Triaged

Bug description:
  (base)adconrad@nosferatu:~$ getent ahostsv4 www.gnu.org..
  208.118.235.148 STREAM wildebeest.gnu.org
  208.118.235.148 DGRAM  
  208.118.235.148 RAW    
  (base)adconrad@nosferatu:~$ sudo sed -i -e 's/ resolve dns/ dns/' /etc/nsswitch.conf 
  (base)adconrad@nosferatu:~$ getent ahostsv4 www.gnu.org..
  (base)adconrad@nosferatu:~$ sudo sed -i -e 's/ dns/ resolve dns/' /etc/nsswitch.conf 
  (base)adconrad@nosferatu:~$ getent ahostsv4 www.gnu.org..
  208.118.235.148 STREAM wildebeest.gnu.org
  208.118.235.148 DGRAM  
  208.118.235.148 RAW    
  (base)adconrad@nosferatu:~$ 

  This is responsible for the new regression in glibc:

  ----------
  FAIL: posix/tst-getaddrinfo5
  original exit status 1
  resolving "localhost." worked, proceeding to test
  resolving "localhost.." failed, test passed
  resolving "www.gnu.org." worked, proceeding to test
  resolving "www.gnu.org.." worked, test failed
  ----------

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