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://lists.isc.org/pipermail/kea-users/2018-October/002062.html
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
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