Public bug reported:
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
** Affects: dnsmasq (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1782362
Title:
dnsmasq segfaults on cnames referring to themselves
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