avahi-autoipd crashed with SIGABRT in __assert_fail_base() when running in ipv6 mode

[Dimitri John Ledkov]

tinc service crashes with avahi-autoipd

ProblemType: Crash
DistroRelease: Ubuntu 15.04
Package: avahi-autoipd 0.6.31-4ubuntu4
ProcVersionSignature: Ubuntu 3.18.0-13.14-generic 3.18.5
Uname: Linux 3.18.0-9-generic x86_64
ApportVersion: 2.16.1-0ubuntu2
Architecture: amd64
CrashCounter: 1
Date: Fri Feb 20 09:16:15 2015
ExecutablePath: /usr/sbin/avahi-autoipd
ExecutableTimestamp: 1416246640
InstallationDate: Installed on 2012-01-12 (1137 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130318)
ProcCmdline: avahi-autoipd:\ [surgut]\ announcing\ 169.254.5.126
ProcCwd: /var/lib/avahi-autoipd
ProcEnviron:

Signal: 6
SourcePackage: avahi
StacktraceTop:
 raise () from /lib/x86_64-linux-gnu/libc.so.6
 abort () from /lib/x86_64-linux-gnu/libc.so.6
 ?? () from /lib/x86_64-linux-gnu/libc.so.6
 __assert_fail () from /lib/x86_64-linux-gnu/libc.so.6
 ?? ()
SystemImageInfo:
 current build number: 0
 device name: ?
 channel: daily
 last update: Unknown
Title: avahi-autoipd crashed with SIGABRT in raise()
UpgradeStatus: Upgraded to vivid on 2015-01-18 (35 days ago)
UserGroups: utah

[Apport retracing service (apport)]

StacktraceTop:
 __assert_fail_base (fmt=0x7f25715a2808 "se == 16 ? ((uintmax_t) exponent - (uintmax_t) (-9223372036854775807L-1)) / 4 : ((uintmax_t) exponent - (uintmax_t) (-9223372036854775807L-1)))", assertion=assertion@entry=0x407170 "((int)((a)->rta_len) - (( ((sizeof(struct rtattr))+4-1) & ~(4-1) ) + (0))) == 4", file=file@entry=0x4070d3 "iface-linux.c", line=line@entry=151, function=function@entry=0x4071ce <__PRETTY_FUNCTION__.5147> "process_nlmsg") at assert.c:92
 __GI___assert_fail (assertion=assertion@entry=0x407170 "((int)((a)->rta_len) - (( ((sizeof(struct rtattr))+4-1) & ~(4-1) ) + (0))) == 4", file=file@entry=0x4070d3 "iface-linux.c", line=line@entry=151, function=function@entry=0x4071ce <__PRETTY_FUNCTION__.5147> "process_nlmsg") at assert.c:101
 process_nlmsg (n=0x7fffba017150) at iface-linux.c:151
 process_response (wait_for_done=0, seq=0) at iface-linux.c:242
 iface_process (event=0x7fffba0191f4) at iface-linux.c:307

[Dimitri John Ledkov (xnox)]

  148: switch(a->rta_type) {
  149: case IFA_LOCAL:
  150: case IFA_ADDRESS:
  151: assert(RTA_PAYLOAD(a) == 4);
  152: memcpy(&address, RTA_DATA(a), sizeof(uint32_t));
  153: break;
  154: }

but IFA_LOCAL is RTA_PAYLOAD can be 16 when operating in ipv6 mode

[Matthew Gabeler-Lee (fastcat)]

related: https://github.com/lathiat/avahi/issues/42