Hi Nathan, Thank you for this detail. I am traveling now, but will attempt reproduction of this issue next week. I will be working from the following assumptions (please correct if any of these are wrong):
- The reservations are stored directly in the global are of the configuration file (not in a PostgreSQL or MySQL database) - The leases are stored in "memfile" (not in a PostgreSQL or MySQL database). - The configuration is stored completely in the json configuration file (i.e., the "configuration backend" (see: https://kea.readthedocs.io/en/kea-2.6.2/arm/dhcp4-srv.html#dhcp4-cb) is not in use). - You have not set any of these configuration directives: reservations-global, reservations-in-subnet, reservations-out-of-pool (see: https://kea.readthedocs.io/en/kea-2.6.2/arm/dhcp4-srv.html#address-reservation-types ) - you have not placed any client-class guards (see: https://kea.readthedocs.io/en/kea-2.6.2/arm/dhcp4-srv.html#pool-selection-with-client-class-reservations) on any of the subnets. Thank you, Darren Ankney On Fri, May 23, 2025 at 2:19 PM Nathan Wicka via Kea-users < kea-users@lists.isc.org> wrote: > Hi, Darren. > > > > We installed it via a package for OL8. > > > > Name : isc-kea > Version : 2.6.1 > Release : isc20240725093407.el8 > Architecture : x86_64 > Size : 17 k > Source : isc-kea-2.6.1-isc20240725093407.el8.src.rpm > Repository : @System > From repo : isc-kea-2-6 > Summary : DHCPv4, DHCPv6 and DDNS server from ISC > URL : http://kea.isc.org > License : MPLv2.0 and Boost > > We then compiled it with debug flags via gitlab from the same tag(2.6.1) > and were able to reproduce the same error > > > > > > *From:* Kea-users <kea-users-boun...@lists.isc.org> *On Behalf Of *Darren > Ankney > *Sent:* Thursday, May 22, 2025 1:24 PM > *To:* Kea user's list <kea-users@lists.isc.org> > *Subject:* Re: [Kea-users] kea crashes from global reservation ip mismatch > > > > Hi Nate, How was Kea installed? Did you compile from source or install via > packages? It doesn't look like that crash from 2018 is relevant. User was > able to avoid the crash by not loading a hook he was trying to create. > Thank you, Darren Ankney > > ZjQcmQRYFpfptBannerStart > > *This Message Is From an Untrusted Sender * > > You have not previously corresponded with this sender. > > ZjQcmQRYFpfptBannerEnd > > Hi Nate, > > > > How was Kea installed? Did you compile from source or install via > > packages? It doesn't look like that crash from 2018 is relevant. > > User was able to avoid the crash by not loading a hook he was trying > > to create. > > > > Thank you, > > Darren Ankney > > > > On Wed, May 21, 2025 at 5:59 PM Nathan Wicka via Kea-users > > <kea-users@lists.isc.org> wrote: > > > > > > > > > > > > Hello. I’m running a kea configuration where we leverage kea global > > reservations w/ Kea v 2.6.1. > > > > > > > > > > > > Most of them look something like this: > > > > > > { > > > > > > "hw-address": "74:86:e2:9d:cf:25", > > > > > > "ip-address": "10.221.53.34", > > > > > > "hostname": "test-switch-123", > > > > > > "option-data": [] > > > > > > } > > > > > > > > > > > > Whenever a DHCP request arrives from the client and there is a subnet > > mismatch: > > > > > > e.g. > > > > > > > > > > > > ./dhcp4-packets.log.3:33153:2025-05-08 07:42:10.381 INFO > > [kea-dhcp4.packets/231784.140559790003968] DHCP4_PACKET_RECEIVED [hwtype=1 > > 74:86:e2:9d:cf:25], cid=[no info], tid=0x510c7747: DHCPDISCOVER (type 1) > > received from 10.254.82.1 to 10.80.252.85 on interface ens192 > > > > > > > > > > > > Kea crashes with the following error: > > > > > > > > > > > > kea-dhcp4: /usr/include/boost/smart_ptr/shared_ptr.hpp:734: typename > > boost::detail::sp_member_access<T>::type boost::shared_ptr<T>::operator->() > > const [with T = const isc::dhcp::Host; typename > > boost::detail::sp_member_access<T>::type = const isc::dhcp::Host*]: > > Assertion `px != 0' failed. > > > > > > > > > > > > Running it through GDB, we see this stack trace: > > > > > > > > > > > > > > > > > > Thread 12 "lt-kea-dhcp4" received signal SIGABRT, Aborted. > > > > > > [Switching to Thread 0x7fffe9ff7700 (LWP 519001)] > > > > > > 0x00007ffff21c55ef in raise () from /lib64/libc.so.6 > > > > > > Missing separate debuginfos, use: yum debuginfo-install > > boost-system-1.66.0-13.el8.x86_64 cyrus-sasl-lib-2.1.27-6.el8_5.x86_64 > > glibc-2.28-251.0.2.el8_10.11.x86_64 > > isc-kea-common-2.6.1-isc20240725093407.el8.x86_64 > > isc-kea-hooks-2.6.1-isc20240725093407.el8.x86_64 > > keyutils-libs-1.5.10-9.0.1.el8.x86_64 krb5-libs-1.18.2-30.0.1.el8_10.x86_64 > > libcom_err-1.46.2-2.el8.x86_64 libgcc-8.5.0-22.0.1.el8_10.x86_64 > > libpq-13.11-1.el8.x86_64 libselinux-2.9-9.el8_10.x86_64 > > libstdc++-8.5.0-22.0.1.el8_10.x86_64 libxcrypt-4.1.1-6.el8.x86_64 > > log4cplus-1.2.0-11.el8.x86_64 mariadb-connector-c-3.1.11-2.el8_3.x86_64 > > openldap-2.4.46-20.el8_10.x86_64 openssl-libs-1.1.1k-14.el8_6.x86_64 > > pcre2-10.32-3.el8_6.x86_64 zlib-1.2.11-25.el8.x86_64 > > > > > > (gdb) backtrace > > > > > > #0 0x00007ffff21c55ef in raise () from /lib64/libc.so.6 > > > > > > #1 0x00007ffff2198e65 in abort () from /lib64/libc.so.6 > > > > > > #2 0x00007ffff2198d39 in __assert_fail_base.cold.0 () from /lib64/libc.so.6 > > > > > > #3 0x00007ffff21bdf46 in __assert_fail () from /lib64/libc.so.6 > > > > > > #4 0x0000000000570c53 in boost::shared_ptr<isc::dhcp::Host > > const>::operator-> (this=0x7fffe9ff4630) at > > /usr/include/boost/smart_ptr/shared_ptr.hpp:734 > > > > > > #5 0x00007ffff779c6d9 in (anonymous namespace)::hasAddressReservation > > (ctx=...) at alloc_engine.cc:3462 > > > > > > #6 0x00007ffff779ea5d in isc::dhcp::AllocEngine::discoverLease4 > > (this=0x918a50, ctx=...) at alloc_engine.cc:3856 > > > > > > #7 0x00007ffff779dc19 in isc::dhcp::AllocEngine::allocateLease4 > > (this=0x918a50, ctx=...) at alloc_engine.cc:3702 > > > > > > #8 0x0000000000558a08 in isc::dhcp::Dhcpv4Srv::assignLease > > (this=0x7fffffffd250, ex=...) at dhcp4_srv.cc:3060 > > > > > > #9 0x000000000055c8e6 in isc::dhcp::Dhcpv4Srv::processDiscover > > (this=0x7fffffffd250, discover=..., context=...) at dhcp4_srv.cc:3709 > > > > > > #10 0x000000000054d809 in isc::dhcp::Dhcpv4Srv::processLocalizedQuery4 > > (this=0x7fffffffd250, ctx=..., allow_answer_park=true) at dhcp4_srv.cc:1586 > > > > > > #11 0x000000000054c655 in isc::dhcp::Dhcpv4Srv::processDhcp4Query > > (this=0x7fffffffd250, query=..., allow_answer_park=true) at > > dhcp4_srv.cc:1532 > > > > > > #12 0x000000000054b49b in isc::dhcp::Dhcpv4Srv::processPacket > > (this=0x7fffffffd250, query=..., allow_answer_park=true) at > > dhcp4_srv.cc:1455 > > > > > > #13 0x000000000054a215 in > > isc::dhcp::Dhcpv4Srv::processPacketAndSendResponse (this=0x7fffffffd250, > > query=...) at dhcp4_srv.cc:1256 > > > > > > #14 0x0000000000549f98 in > > isc::dhcp::Dhcpv4Srv::processPacketAndSendResponseNoThrow > > (this=0x7fffffffd250, query=...) at dhcp4_srv.cc:1244 > > > > > > #15 0x0000000000598e09 in std::__invoke_impl<void, void > > (isc::dhcp::Dhcpv4Srv::*&)(boost::shared_ptr<isc::dhcp::Pkt4>), > > isc::dhcp::Dhcpv4Srv*&, boost::shared_ptr<isc::dhcp::Pkt4>&> (__f= > > > > > > @0x93aa30: (void (isc::dhcp::Dhcpv4Srv::*)(isc::dhcp::Dhcpv4Srv * > > const, boost::shared_ptr<isc::dhcp::Pkt4>)) 0x549f4a > > <isc::dhcp::Dhcpv4Srv::processPacketAndSendResponseNoThrow(boost::shared_ptr<isc::dhcp::Pkt4>)>, > > __t=@0x93aa50: 0x7fffffffd250) at /usr/include/c++/8/bits/invoke.h:73 > > > > > > #16 0x0000000000595cb7 in std::__invoke<void > > (isc::dhcp::Dhcpv4Srv::*&)(boost::shared_ptr<isc::dhcp::Pkt4>), > > isc::dhcp::Dhcpv4Srv*&, boost::shared_ptr<isc::dhcp::Pkt4>&> (__fn= > > > > > > @0x93aa30: (void (isc::dhcp::Dhcpv4Srv::*)(isc::dhcp::Dhcpv4Srv * > > const, boost::shared_ptr<isc::dhcp::Pkt4>)) 0x549f4a > > <isc::dhcp::Dhcpv4Srv::processPacketAndSendResponseNoThrow(boost::shared_ptr<isc::dhcp::Pkt4>)>) > > at /usr/include/c++/8/bits/invoke.h:95 > > > > > > #17 0x0000000000592359 in std::_Bind<void > > (isc::dhcp::Dhcpv4Srv::*(isc::dhcp::Dhcpv4Srv*, > > boost::shared_ptr<isc::dhcp::Pkt4>))(boost::shared_ptr<isc::dhcp::Pkt4>)>::__call<void, > > , 0ul, 1ul>(std::tuple<>&&, std::_Index_tuple<0ul, 1ul>) (this=0x93aa30, > > __args=...) at /usr/include/c++/8/functional:400 > > > > > > #18 0x000000000058c8c2 in std::_Bind<void > > (isc::dhcp::Dhcpv4Srv::*(isc::dhcp::Dhcpv4Srv*, > > boost::shared_ptr<isc::dhcp::Pkt4>))(boost::shared_ptr<isc::dhcp::Pkt4>)>::operator()<, > > void>() ( > > > > > > this=0x93aa30) at /usr/include/c++/8/functional:484 > > > > > > #19 0x0000000000584d2f in std::_Function_handler<void (), std::_Bind<void > > (isc::dhcp::Dhcpv4Srv::*(isc::dhcp::Dhcpv4Srv*, > > boost::shared_ptr<isc::dhcp::Pkt4>))(boost::shared_ptr<isc::dhcp::Pkt4>)> > > >::_M_invoke(std::_Any_data const&) (__functor=...) at > > /usr/include/c++/8/bits/std_function.h:297 > > > > > > #20 0x00007ffff79143a6 in std::function<void ()>::operator()() const > > (this=0x1426af0) at /usr/include/c++/8/bits/std_function.h:687 > > > > > > #21 0x00007ffff4187348 in isc::util::ThreadPool<std::function<void ()>, > > std::deque<boost::shared_ptr<std::function<void ()> >, > > std::allocator<boost::shared_ptr<std::function<void ()> > > > >::run() > > (this=0x7ffff43ffa58 > > <isc::util::MultiThreadingMgr::instance()::manager+24>) at > > ../../../src/lib/util/thread_pool.h:599 > > > > > > #22 0x00007ffff4189058 in std::__invoke_impl<void, void > > (isc::util::ThreadPool<std::function<void ()>, > > std::deque<boost::shared_ptr<std::function<void ()> >, > > std::allocator<boost::shared_ptr<std::function<void ()> > > > >::*)(), > > isc::util::ThreadPool<std::function<void ()>, > > std::deque<boost::shared_ptr<std::function<void ()> >, > > std::allocator<boost::shared_ptr<std::function<void ()> > > > > > >*>(std::__invoke_memfun_deref, void > > (isc::util::ThreadPool<std::function<void ()>, > > std::deque<boost::shared_ptr<std::function<void ()> >, > > std::allocator<boost::shared_ptr<std::function<void ()> > > > >::*&&)(), > > isc::util::ThreadPool<std::function<void ()>, > > std::deque<boost::shared_ptr<std::function<void ()> >, > > std::allocator<boost::shared_ptr<std::function<void ()> > > > >*&&) ( > > > > > > __f=@0x1531210: (void (isc::util::ThreadPool<std::function<void()>, > > std::deque<boost::shared_ptr<std::function<void()> >, > > std::allocator<boost::shared_ptr<std::function<void()> > > > > > >::*)(isc::util::ThreadPool<std::function<void()>, > > std::deque<boost::shared_ptr<std::function<void()> >, > > std::allocator<boost::shared_ptr<std::function<void()> > > > > * const)) > > 0x7ffff41872e6 <isc::util::ThreadPool<std::function<void ()>, > > std::deque<boost::shared_ptr<std::function<void ()> >, > > std::allocator<boost::shared_ptr<std::function<void ()> > > > >::run()>, > > > > > > __t=@0x1531208: 0x7ffff43ffa58 > > <isc::util::MultiThreadingMgr::instance()::manager+24>) at > > /usr/include/c++/8/bits/invoke.h:73 > > > > > > #23 0x00007ffff418827d in std::__invoke<void > > (isc::util::ThreadPool<std::function<void ()>, > > std::deque<boost::shared_ptr<std::function<void ()> >, > > std::allocator<boost::shared_ptr<std::function<void ()> > > > >::*)(), > > isc::util::ThreadPool<std::function<void ()>, > > std::deque<boost::shared_ptr<std::function<void ()> >, > > std::allocator<boost::shared_ptr<std::function<void ()> > > > >*>(void > > (isc::util::ThreadPool<std::function<void ()>, > > std::deque<boost::shared_ptr<std::function<void ()> >, > > std::allocator<boost::shared_ptr<std::function<void ()> > > > >::*&&)(), > > isc::util::ThreadPool<std::function<void ()>, > > std::deque<boost::shared_ptr<std::function<void ()> >, > > std::allocator<boost::shared_ptr<std::function<void ()> > > > >*&&) ( > > > > > > __fn=@0x1531210: (void (isc::util::ThreadPool<std::function<void()>, > > std::deque<boost::shared_ptr<std::function<void()> >, > > std::allocator<boost::shared_ptr<std::function<void()> > > > > > >::*)(isc::util::ThreadPool<std::function<void()>, > > std::deque<boost::shared_ptr<std::function<void()> >, > > std::allocator<boost::shared_ptr<std::function<void()> > > > > * const)) > > 0x7ffff41872e6 <isc::util::ThreadPool<std::function<void ()>, > > std::deque<boost::shared_ptr<std::function<void ()> >, > > std::allocator<boost::shared_ptr<std::function<void ()> > > > >::run()>) > > > > > > at /usr/include/c++/8/bits/invoke.h:95 > > > > > > #24 0x00007ffff418accb in std::thread::_Invoker<std::tuple<void > > (isc::util::ThreadPool<std::function<void ()>, > > std::deque<boost::shared_ptr<std::function<void ()> >, > > std::allocator<boost::shared_ptr<std::function<void ()> > > > >::*)(), > > isc::util::ThreadPool<std::function<void ()>, > > std::deque<boost::shared_ptr<std::function<void ()> >, > > std::allocator<boost::shared_ptr<std::function<void ()> > > > >*> > > >::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>) (this=0x1531208) at > > /usr/include/c++/8/thread:244 > > > > > > #25 0x00007ffff418ac4a in std::thread::_Invoker<std::tuple<void > > (isc::util::ThreadPool<std::function<void ()>, > > std::deque<boost::shared_ptr<std::function<void ()> >, > > std::allocator<boost::shared_ptr<std::function<void ()> > > > >::*)(), > > isc::util::ThreadPool<std::function<void ()>, > > std::deque<boost::shared_ptr<std::function<void ()> >, > > std::allocator<boost::shared_ptr<std::function<void ()> > > > >*> > > >::operator()() (this=0x1531208) at /usr/include/c++/8/thread:253 > > > > > > #26 0x00007ffff418ab6a in > > std::thread::_State_impl<std::thread::_Invoker<std::tuple<void > > (isc::util::ThreadPool<std::function<void ()>, > > std::deque<boost::shared_ptr<std::function<void ()> >, > > std::allocator<boost::shared_ptr<std::function<void ()> > > > >::*)(), > > isc::util::ThreadPool<std::function<void ()>, > > std::deque<boost::shared_ptr<std::function<void ()> >, > > std::allocator<boost::shared_ptr<std::function<void ()> > > > >*> > > > >::_M_run() (this=0x1531200) at /usr/include/c++/8/thread:196 > > > > > > #27 0x00007ffff2baab23 in execute_native_thread_routine () from > > /lib64/libstdc++.so.6 > > > > > > #28 0x00007ffff3c941da in start_thread () from /lib64/libpthread.so.0 > > > > > > #29 0x00007ffff21b08d3 in clone () from /lib64/libc.so.6, this is the full > > stack trace: > > > > > > > > > > > > So it appears that Kea is not handling the subnet/IP mismatch. > > > > > > For reference, I also see this error being referenced in this thread from > > 2018 > > https://urldefense.com/v3/__https://lists.isc.org/pipermail/kea-users/2018-October/002062.html__;!!E3l7wfIP!nxTjPGDuAaEG8QB73V_RrZkNJsctgtCW1LocmxRc3kOn0aLwOLmOG8zIR1EOZSHFwZmzJSz9WJAJla12BQrqCg$ > > > > <https://urldefense.com/v3/__https:/lists.isc.org/pipermail/kea-users/2018-October/002062.html__;!!E3l7wfIP!nxTjPGDuAaEG8QB73V_RrZkNJsctgtCW1LocmxRc3kOn0aLwOLmOG8zIR1EOZSHFwZmzJSz9WJAJla12BQrqCg$> > > > > > > > > > > > > Can someone investigate this potential bug, or, if there is a preferred > > configuration change we can make to stabilize this, we can share more about > > our configs. > > > > > > > > > > > > Thanks! > > > > > > -Nate > > > > > > -- > > > ISC funds the development of this software with paid support subscriptions. > > Contact us at > > https://urldefense.com/v3/__https://www.isc.org/contact/__;!!E3l7wfIP!nxTjPGDuAaEG8QB73V_RrZkNJsctgtCW1LocmxRc3kOn0aLwOLmOG8zIR1EOZSHFwZmzJSz9WJAJla3Ql1-h7w$ > > > > 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