[Pkg-dns-devel] Bug#849821: pdns-recursor: Crash with DNSSEC enabled
Chris Boot
bootc at debian.org
Sat Dec 31 14:18:07 UTC 2016
Package: pdns-recursor
Version: 4.0.3-4
Severity: important
Dear maintainers,
Since the upgrade from 4.0.3-3 to 4.0.3-4 I have been experiencing
intermittent crashes in pdns-recursor. I have so far not managed to get
a core dump from the daemon, so have resorted to running the process
within gdb to catch a backtrace. I have included this below:
(gdb) bt
#0 __GI_raise (sig=sig at entry=6) at ../sysdeps/unix/sysv/linux/raise.c:58
#1 0x00007f405816440a in __GI_abort () at abort.c:89
#2 0x00007f40581a0bd0 in __libc_message (do_abort=do_abort at entry=2, fmt=fmt at entry=0x7f4058295c70 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
#3 0x00007f40581a6fa6 in malloc_printerr (action=3, str=0x7f4058295d80 "free(): invalid next size (fast)", ptr=<optimized out>, ar_ptr=<optimized out>) at malloc.c:5046
#4 0x00007f40581a779e in _int_free (av=0x7f404c000020, p=0x7f404c9985f0, have_lock=0) at malloc.c:3902
#5 0x000055b3dcea35e3 in __gnu_cxx::new_allocator<std::_Rb_tree_node<std::pair<DNSName const, double> > >::deallocate (this=<optimized out>, __p=<optimized out>) at /usr/include/c++/6/ext/new_allocator.h:110
#6 std::allocator_traits<std::allocator<std::_Rb_tree_node<std::pair<DNSName const, double> > > >::deallocate (__a=..., __n=1, __p=<optimized out>) at /usr/include/c++/6/bits/alloc_traits.h:442
#7 std::_Rb_tree<DNSName, std::pair<DNSName const, double>, std::_Select1st<std::pair<DNSName const, double> >, std::less<DNSName>, std::allocator<std::pair<DNSName const, double> > >::_M_put_node (this=0x7f404cb6bb60, __p=<optimized out>) at /usr/include/c++/6/bits/stl_tree.h:509
#8 std::_Rb_tree<DNSName, std::pair<DNSName const, double>, std::_Select1st<std::pair<DNSName const, double> >, std::less<DNSName>, std::allocator<std::pair<DNSName const, double> > >::_M_drop_node (__p=<optimized out>, this=0x7f404cb6bb60) at /usr/include/c++/6/bits/stl_tree.h:576
#9 std::_Rb_tree<DNSName, std::pair<DNSName const, double>, std::_Select1st<std::pair<DNSName const, double> >, std::less<DNSName>, std::allocator<std::pair<DNSName const, double> > >::_M_erase (this=this at entry=0x7f404cb6bb60, __x=<optimized out>) at /usr/include/c++/6/bits/stl_tree.h:1640
#10 0x000055b3dcea35f4 in std::_Rb_tree<DNSName, std::pair<DNSName const, double>, std::_Select1st<std::pair<DNSName const, double> >, std::less<DNSName>, std::allocator<std::pair<DNSName const, double> > >::_M_erase (this=this at entry=0x7f404cb6bb60, __x=0x7f404c0e4d70) at /usr/include/c++/6/bits/stl_tree.h:1638
#11 0x000055b3dcea35f4 in std::_Rb_tree<DNSName, std::pair<DNSName const, double>, std::_Select1st<std::pair<DNSName const, double> >, std::less<DNSName>, std::allocator<std::pair<DNSName const, double> > >::_M_erase (this=this at entry=0x7f404cb6bb60, __x=0x7f404c7b3220) at /usr/include/c++/6/bits/stl_tree.h:1638
#12 0x000055b3dcea35f4 in std::_Rb_tree<DNSName, std::pair<DNSName const, double>, std::_Select1st<std::pair<DNSName const, double> >, std::less<DNSName>, std::allocator<std::pair<DNSName const, double> > >::_M_erase (this=this at entry=0x7f404cb6bb60, __x=0x7f404c9fdc30) at /usr/include/c++/6/bits/stl_tree.h:1638
#13 0x000055b3dcea35f4 in std::_Rb_tree<DNSName, std::pair<DNSName const, double>, std::_Select1st<std::pair<DNSName const, double> >, std::less<DNSName>, std::allocator<std::pair<DNSName const, double> > >::_M_erase (this=this at entry=0x7f404cb6bb60, __x=0x7f404c9fc200) at /usr/include/c++/6/bits/stl_tree.h:1638
#14 0x000055b3dcea9a43 in std::_Rb_tree<DNSName, std::pair<DNSName const, double>, std::_Select1st<std::pair<DNSName const, double> >, std::less<DNSName>, std::allocator<std::pair<DNSName const, double> > >::~_Rb_tree (this=0x7f404cb6bb60, __in_chrg=<optimized out>) at /usr/include/c++/6/bits/stl_tree.h:873
#15 std::map<DNSName, double, std::less<DNSName>, std::allocator<std::pair<DNSName const, double> > >::~map (this=0x7f404cb6bb60, __in_chrg=<optimized out>) at /usr/include/c++/6/bits/stl_map.h:96
#16 SyncRes::shuffleInSpeedOrder (this=this at entry=0x7f404cb76c60, tnameservers=..., prefix=...) at syncres.cc:885
#17 0x000055b3dce96276 in SyncRes::doResolveAt (this=this at entry=0x7f404cb76c60, nameservers=..., auth=..., flawedNSSet=flawedNSSet at entry=false, qname=..., qtype=..., ret=..., depth=<optimized out>, beenthere=...) at syncres.cc:989
#18 0x000055b3dce9fd5d in SyncRes::doResolve (this=this at entry=0x7f404cb76c60, qname=..., qtype=..., ret=..., depth=depth at entry=15, beenthere=...) at syncres.cc:470
#19 0x000055b3dcea19d8 in SyncRes::getAddrs (this=this at entry=0x7f404cb76c60, qname=..., depth=depth at entry=14, beenthere=...) at syncres.cc:517
#20 0x000055b3dce98ed2 in SyncRes::doResolveAt (this=this at entry=0x7f404cb76c60, nameservers=..., auth=..., flawedNSSet=flawedNSSet at entry=false, qname=..., qtype=..., ret=..., depth=<optimized out>, beenthere=...) at syncres.cc:1041
#21 0x000055b3dce9fd5d in SyncRes::doResolve (this=this at entry=0x7f404cb76c60, qname=..., qtype=..., ret=..., depth=depth at entry=12, beenthere=...) at syncres.cc:470
#22 0x000055b3dcea19d8 in SyncRes::getAddrs (this=this at entry=0x7f404cb76c60, qname=..., depth=depth at entry=11, beenthere=...) at syncres.cc:517
#23 0x000055b3dce98ed2 in SyncRes::doResolveAt (this=this at entry=0x7f404cb76c60, nameservers=..., auth=..., flawedNSSet=flawedNSSet at entry=false, qname=..., qtype=..., ret=..., depth=<optimized out>, beenthere=...) at syncres.cc:1041
#24 0x000055b3dce9fd5d in SyncRes::doResolve (this=this at entry=0x7f404cb76c60, qname=..., qtype=..., ret=..., depth=depth at entry=9, beenthere=...) at syncres.cc:470
#25 0x000055b3dcea19d8 in SyncRes::getAddrs (this=this at entry=0x7f404cb76c60, qname=..., depth=depth at entry=8, beenthere=...) at syncres.cc:517
#26 0x000055b3dce98ed2 in SyncRes::doResolveAt (this=this at entry=0x7f404cb76c60, nameservers=..., auth=..., flawedNSSet=flawedNSSet at entry=false, qname=..., qtype=..., ret=..., depth=<optimized out>, beenthere=...) at syncres.cc:1041
#27 0x000055b3dce9fd5d in SyncRes::doResolve (this=this at entry=0x7f404cb76c60, qname=..., qtype=..., ret=..., depth=depth at entry=6, beenthere=...) at syncres.cc:470
#28 0x000055b3dcea19d8 in SyncRes::getAddrs (this=this at entry=0x7f404cb76c60, qname=..., depth=depth at entry=5, beenthere=...) at syncres.cc:517
#29 0x000055b3dce98ed2 in SyncRes::doResolveAt (this=this at entry=0x7f404cb76c60, nameservers=..., auth=..., flawedNSSet=flawedNSSet at entry=false, qname=..., qtype=..., ret=..., depth=<optimized out>, beenthere=...) at syncres.cc:1041
#30 0x000055b3dce9fd5d in SyncRes::doResolve (this=this at entry=0x7f404cb76c60, qname=..., qtype=..., ret=..., depth=depth at entry=3, beenthere=...) at syncres.cc:470
#31 0x000055b3dcea19d8 in SyncRes::getAddrs (this=this at entry=0x7f404cb76c60, qname=..., depth=depth at entry=2, beenthere=...) at syncres.cc:517
#32 0x000055b3dce98ed2 in SyncRes::doResolveAt (this=this at entry=0x7f404cb76c60, nameservers=..., auth=..., flawedNSSet=flawedNSSet at entry=false, qname=..., qtype=..., ret=..., depth=<optimized out>, beenthere=...) at syncres.cc:1041
#33 0x000055b3dce9fd5d in SyncRes::doResolve (this=this at entry=0x7f404cb76c60, qname=..., qtype=..., ret=..., depth=depth at entry=0, beenthere=...) at syncres.cc:470
#34 0x000055b3dcea0df3 in SyncRes::beginResolve (this=this at entry=0x7f404cb76c60, qname=..., qtype=..., qclass=qclass at entry=1, ret=...) at syncres.cc:180
#35 0x000055b3dceb96cd in SRRecordOracle::get (this=0x7f404cb780a0, qname=..., qtype=<optimized out>) at validate-recursor.cc:24
#36 0x000055b3dceaef15 in getZoneCuts (begin=..., end=..., dro=...) at validate.cc:130
#37 0x000055b3dceb1f49 in getKeysFor (dro=..., zone=..., keyset=...) at validate.cc:273
#38 0x000055b3dceb8918 in validateRecords (recs=...) at validate-recursor.cc:104
#39 0x000055b3dcdfda2b in startDoResolve (p=0x7f404ca8e5a0) at pdns_recursor.cc:951
#40 0x000055b3dce1385b in MTasker<PacketID, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::makeThread(void (*)(void*), void*)::{lambda()#1}::operator()() const (__closure=<optimized out>) at mtasker.cc:270
#41 boost::detail::function::void_function_obj_invoker0<MTasker<PacketID, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >::makeThread(void (*)(void*), void*)::{lambda()#1}, void>::invoke(boost::detail::function::function_buffer&) (function_obj_ptr=...) at /usr/include/boost/function/function_template.hpp:159
#42 0x000055b3dcddf1a9 in boost::function0<void>::operator() (this=0x7f404cb791e0) at /usr/include/boost/function/function_template.hpp:771
#43 threadWrapper (ctx0=32576, ctx1=1285765232, fun0=<optimized out>, fun1=<optimized out>) at mtasker_ucontext.cc:77
#44 0x00007f4058173fe0 in ?? () from target:/lib/x86_64-linux-gnu/libc.so.6
#45 0x00007f404c001d10 in ?? ()
#46 0x722e30736e203a65 in ?? ()
#47 0x6362622e766f7362 in ?? ()
#48 0x00000000000727e1 in ?? ()
#49 0x00007f404c000838 in ?? ()
#50 0x00007f404c000838 in ?? ()
#51 0x00007f404cb79260 in ?? ()
#52 0x00007f404cb79260 in ?? ()
#53 0x2020202020202020 in ?? ()
#54 0x62722e30736e2020 in ?? ()
#55 0x2e6362622e766f73 in ?? ()
#56 0x62203a6b752e6f63 in ?? ()
#57 0x65726568746e6565 in ?? ()
#58 0x62722e30736e203a in ?? ()
#59 0x2e6362622e766f73 in ?? ()
#60 0x20417c6b752e6f63 in ?? ()
#61 0x202020200a293828 in ?? ()
#62 0x2020202020202020 in ?? ()
#63 0x2020202020202020 in ?? ()
#64 0x2020202020202020 in ?? ()
#65 0x2020202020202020 in ?? ()
#66 0x6f7362722e30736e in ?? ()
#67 0x6f632e6362622e76 in ?? ()
#68 0x656562203a6b752e in ?? ()
#69 0x203a65726568746e in ?? ()
#70 0x6f7362722e30736e in ?? ()
#71 0x6f632e6362622e76 in ?? ()
#72 0x342820417c6b752e in ?? ()
#73 0x2020202020200a29 in ?? ()
#74 0x2020202020202020 in ?? ()
#75 0x2020202020202020 in ?? ()
#76 0x2020202020202020 in ?? ()
#77 0x736e202020202020 in ?? ()
#78 0x2e766f7362722e30 in ?? ()
#79 0x752e6f632e636262 in ?? ()
#80 0x746e656562203a6b in ?? ()
#81 0x736e203a65726568 in ?? ()
#82 0x2e766f7362722e30 in ?? ()
#83 0x752e6f632e636262 in ?? ()
#84 0x2820414141417c6b in ?? ()
#85 0x20202020200a2938 in ?? ()
#86 0x2020202020202020 in ?? ()
#87 0x2020202020202020 in ?? ()
#88 0x2020202020202020 in ?? ()
#89 0x6e20202020202020 in ?? ()
#90 0x766f7362722e3073 in ?? ()
#91 0x2e6f632e6362622e in ?? ()
#92 0x6e656562203a6b75 in ?? ()
#93 0x203a2a6572656874 in ?? ()
#94 0x6f7362722e30736e in ?? ()
#95 0x6f632e6362622e76 in ?? ()
#96 0x414141417c6b752e in ?? ()
#97 0x2020200a29342820 in ?? ()
#98 0x2020202020202020 in ?? ()
#99 0x2020202020202020 in ?? ()
#100 0x2020202020202020 in ?? ()
#101 0x2020202020202020 in ?? ()
#102 0x7362722e30736e20 in ?? ()
#103 0x632e6362622e766f in ?? ()
#104 0x6562203a6b752e6f in ?? ()
#105 0x3a65726568746e65 in ?? ()
#106 0x6362622e33736e20 in ?? ()
At this point the stack seems to recurse very deep, perhaps infinitely.
I stopped at 3768 frames of repetition.
I have two identical machines running pdns_recursor behind dnsdist, and
both suffer from this issue.
I hope this helps.
Regards,
Chris
-- System Information:
Debian Release: stretch/sid
APT prefers testing
APT policy: (990, 'testing'), (500, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 4.8.0-2-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages pdns-recursor depends on:
ii adduser 3.115
ii dns-root-data 2015052300+h+1
ii init-system-helpers 1.46
ii libatomic1 6.2.1-5
ii libc6 2.24-8
ii libgcc1 1:6.2.1-5
ii liblua5.2-0 5.2.4-1.1+b1
ii libprotobuf10 3.0.0-9
ii libssl1.1 1.1.0c-2
ii libstdc++6 6.2.1-5
ii libsystemd0 232-8
pdns-recursor recommends no packages.
pdns-recursor suggests no packages.
-- Configuration Files:
/etc/powerdns/recursor.conf changed:
allow-from=<<<< redacted>>>>
carbon-server=2a02:2770:8::2635:0:1
config-dir=/etc/powerdns
dnssec=validate
dnssec-log-bogus=yes
hint-file=/usr/share/dns/root.hints
include-dir=/etc/powerdns/recursor.d
local-address=::,0.0.0.0
local-port=8053
log-common-errors=yes
query-local-address6=::
quiet=yes
security-poll-suffix=
server-down-max-fails=0
server-down-throttle-time=0
setgid=pdns
setuid=pdns
trace=fail
-- no debconf information
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