BIRD 3.2.1, 3.1.6, 2.18.1, and 2.17.4 released

[David Petera]

Hi Matt,

thanks for the report.

With which version did this happen exactly? v3.2.1 or v3.1.6?

Could you maybe sent me off list core file, exact binary and logs just 
before the crash if you have some?

That would help us a lot.

Best regards and happy routing!
David

David Petera (he/him) | BIRD Tech Support | CZ.NIC, z.s.p.o.

On 4/21/26 03:50, Matt Corallo wrote:
> Thanks! This release appears to be materially more stable than earlier 
> 3.X.Y releases!
>
> I did manage to hit Assertion '!obstacle_target_count(&c->obstacles)' 
> failed at conf/conf.c:209 after some extended runtime. I have a 
> coredump but the bt is
>
> (gdb) thread apply all bt
> Thread 4 (Thread 0x7ff5f689c6c0 (LWP 327796)):
> ..
> #4  0x000055ccd4a1c476 in poll (__fds=<optimized out>, 
> __nfds=<optimized out>, __timeout=144) at 
> /usr/include/x86_64-linux-gnu/bits/poll2.h:44
> #5  bird_thread_main (arg=0x55ccde4d70b0) at sysdep/unix/io-loop.c:1044
> ..
>
> Thread 3 (Thread 0x7ff5f709d6c0 (LWP 327795)):
> ..
> #4  0x000055ccd4a1c476 in poll (__fds=<optimized out>, 
> __nfds=<optimized out>, __timeout=314) at 
> /usr/include/x86_64-linux-gnu/bits/poll2.h:44
> #5  bird_thread_main (arg=0x55ccde4d68a0) at sysdep/unix/io-loop.c:1044
> ..
>
> Thread 2 (Thread 0x7ff5f605b6c0 (LWP 327797)):
> ..
> #4  0x000055ccd4a1c476 in poll (__fds=<optimized out>, 
> __nfds=<optimized out>, __timeout=3) at 
> /usr/include/x86_64-linux-gnu/bits/poll2.h:44
> #5  bird_thread_main (arg=0x55ccde4ea070) at sysdep/unix/io-loop.c:1044
> ..
>
> Thread 1 (Thread 0x7ff5f7a87e00 (LWP 327793)):
> #0  __pthread_kill_implementation (threadid=<optimized out>, 
> signo=signo at entry=6, no_tid=no_tid at entry=0) at ./nptl/pthread_kill.c:44
> #1  0x00007ff5f7bf59ff in __pthread_kill_internal (threadid=<optimized 
> out>, signo=6) at ./nptl/pthread_kill.c:89
> #2  0x00007ff5f7ba0cc2 in __GI_raise (sig=sig at entry=6) at 
> ../sysdeps/posix/raise.c:26
> #3  0x00007ff5f7b894ac in __GI_abort () at ./stdlib/abort.c:77
> #4  0x000055ccd4a2118c in bug (msg=msg at entry=0x55ccd4a320d0 "Assertion 
> '%s' failed at %s:%d") at sysdep/unix/log.c:442
> #5  0x000055ccd493aeca in config_free (c=0x7ff5ec07d030) at 
> conf/conf.c:209
> #6  config_free (c=0x7ff5ec07d030) at conf/conf.c:203
> #7  0x000055ccd493b2ca in config_do_commit 
> (cr=cr at entry=0x7ffeb5bc4ff0, type=type at entry=1) at conf/conf.c:302
> #8  0x000055ccd493b67e in config_done () at conf/conf.c:380
> #9  0x000055ccd4968c8c in ev_run_list_limited (l=0x55ccd4ab0598 
> <main_birdloop+216>, limit=4294967294, limit at entry=4294967295) at 
> lib/event.c:338
> #10 0x000055ccd4a16378 in io_loop () at sysdep/unix/io.c:2646
> #11 0x000055ccd4925325 in main (argc=<optimized out>, argv=<optimized 
> out>) at sysdep/unix/main.c:1111
>
> On 4/5/26 3:10 PM, Maria Matejka via Bird-users wrote:
>> Dear BIRD Users,
>>
>> it’s been quite a while but we have released BIRD versions 3.2.1, 
>> 3.1.6, 2.18.1, and 2.17.4. Yes, all of these. We got a lot of 
>> bugreports, not only through the users list but also privately. Thank 
>> you all so much for them.
>>
>> The download link is, as always: https://bird.nic.cz/get-bird/
>>
>> There is the ASPA fix you are waiting for, fixing broken downstream 
>> validation. Thanks for reporting and contributing; that was a stupid 
>> mistake. More on that hopefully at RIPE 92 in Edinburgh.
>>
>> Also in all released versions, there are:
>>
>>   * bugfixes for |krt_congctl| attribute handling
>>   * logrotate file size limit lower bound (16k)
>>   * a bunch of CI updates
>>
>> For LTS 3.1.6 and 2.17.4, we also included fixes of BGP 
>> reconfiguration which are already in 3.2.x and 2.18.x.
>>
>> And then there is much more fixed in BIRD 3 alone:
>>
>>   * logrotate crash fix
>>   * ROA check crash fix (strangely manifesting mostly when 
>> manipulating ASPA checks in filters)
>>   * graceful recovery fix (now it doesn’t crash when recovery is done)
>>   * BGP route refresh request fix (now it works even after session flap)
>>   * BMP (now it actually sends routes)
>>   * rare pipe collision bug
>>   * BGP dynamic instance crash fix (3.2.1 only)
>>   * keyword redefinition allowed again (3.2.1 only)
>>
>> We did what we could to keep track of everything. If you reported 
>> something between 3.2 and 2.18 was released, and March 31, 2026, it 
>> should be included in this release. Yet, we may have missed 
>> something, and also while we did our best to cover all reported bugs 
>> by automatic tests, we would still love if you found some time to 
>> check that on your side and report both positive and negative outcomes.
>>
>> Also it looks like there are already some new bugreports. We’ll try 
>> to pick them up as soon as possible.
>>
>> In parallel, we are also preparing a next minor (feature) release. 
>> Although the only merged feature is now RAdv neighbor discovery with 
>> BGP autoconnect, we also expect to include the |oz-evpn| branch (for 
>> both BIRD 2 and 3) and a bunch of BGP export memory optimization 
>> updates for BIRD 3.
>>
>> Thank you all again for all your reports, contributions, patience and 
>> efforts.
>>
>> Happy routing!
>> Maria and the BIRD Team
>>
>> –
>> Maria Matejka (she/her) | BIRD Team Leader | CZ.NIC, z.s.p.o.
>>
>