All those variables were written over with 0xde:
#7 0x00007f2e244b6f12 in add_bad (fctx=fctx@entry=0x7f2e1a3ab8a0,
addrinfo=addrinfo@entry=0x7f2e0b046588, reason=reason@entry=65620,
badtype=badtype@entry=badns_validation) at ../../../lib/dns/resolver.c:2892
2892 ../../../lib/dns/resolver.c: No such file or directory.
(gdb) p *addrinfo
$131 = {magic = 166920408, sockaddr = {type = {sa = {sa_family = 57054, sa_data
= '\336' <repeats 13 times>, <incomplete sequence \336>}, sin = {sin_family =
57054, sin_port = 57054, sin_addr = {
s_addr = 3739147998}, sin_zero = "\336\336\336\336\336\336\336",
<incomplete sequence \336>}, sin6 = {sin6_family = 57054, sin6_port = 57054,
sin6_flowinfo = 3739147998, sin6_addr = {__in6_u = {
__u6_addr8 = '\336' <repeats 15 times>, <incomplete sequence \336>,
__u6_addr16 = {57054, 57054, 57054, 57054, 57054, 57054, 57054, 57054},
__u6_addr32 = {3739147998, 3739147998, 3739147998,
3739147998}}}, sin6_scope_id = 3739147998}, ss = {ss_family =
57054, __ss_padding = '\336' <repeats 117 times>, <incomplete sequence \336>,
__ss_align = 16059518370053021406}, sunix = {
sun_family = 57054, sun_path = '\336' <repeats 107 times>, <incomplete
sequence \336>}}, length = 3739147998, link = {prev = 0xdededededededede, next
= 0xdededededededede}}, srtt = 3739147998,
dscp = -8482, flags = 3739147998, entry = 0xdededededededede, publink = {prev
= 0xdededededededede, next = 0xdededededededede}}
I failed to find an upstream bug about this (open or closed), and an
inspection of the commit messages also didn't yield useful results to
me.
I also tried some of the domain names your logs showed but didn't manage
to crash my bind server. Your server is quite busy, though, so this
could also be a race condition.
Would you perhaps be willing to submit a bug upstream at bugs.isc.org,
including the core dump (or just let me know the bug number and I can
attach it there: you have to extract it from the crash file with apport-
unpack).
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https://bugs.launchpad.net/bugs/1736943
Title:
9.10.3.dfsg.P4-8ubuntu1.9 - keep on crashing on Ubuntu 16.04
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