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[Bug 1782362] Re: dnsmasq segfaults on cnames referring to themselves

To: group.of.nepali.translators@xxxxxxxxxxxxxxxxxxx
From:  Christian Ehrhardt  <1782362@xxxxxxxxxxxxxxxxxx>
Date: Thu, 19 Jul 2018 05:44:45 -0000
Reply-to: Bug 1782362 <1782362@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

** Also affects: dnsmasq (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: dnsmasq (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Changed in: dnsmasq (Ubuntu)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1782362

Title:
  dnsmasq segfaults on cnames referring to themselves

Status in dnsmasq package in Ubuntu:
  Fix Released
Status in dnsmasq source package in Trusty:
  New
Status in dnsmasq source package in Xenial:
  New

Bug description:
  If one would add a CNAME-record that would point to itself like so:
  CNAME=test.example.com,test.example.com

  This will result in a segfault and crash of the dnsmasq process.

  Segfault on 14.04 / dnsmasq 2.68:
  dnsmasq[22762]: segfault at 7ffe1727dff8 ip 00007f7c60cde755 sp 00007ffe1727dff0 error 6 in libc-2.19.so[7f7c60c5e000+1be000]

  Segfault on 16.04 / dnsmasq 2.75:
  dnsmasq[21097]: segfault at 7ffc4bf90ff8 ip 00007f268bf7ebbc sp 00007ffc4bf90ff0 error 6 in libc-2.23.so[7f268befd000+1c0000]

  
  Ubuntu versions affected: Ubuntu 14.04.5 LTS & Ubuntu 16.04.4 LTS

  dnsmasq version (14.04) 2.68-1ubuntu0.2
  dnsmasq version (16.04): 2.75-1ubuntu0.16.04.5

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