Dear Nicolas and Darren. Thank you for reporting this to us. Please send us your config files and we will look into that. For a private message please use bird-support@network.cz Kind regards, Jana Jana Babovakova (she/her) | BIRD Tech Support | CZ.NIC, z.s.p.o. On 19. 05. 25 1:40, Darren O'Connor wrote:

Just installed 3.1.1 and getting the same. When looking at syslog I see the following:

May 18 23:37:28 kernel: [ 351.570830] bird[1677]: segfault at 0 ip 0000000000000000 sp 00007fd4fcc2e5c8 error 14 in bird[563a88e0e000+14000] May 18 23:37:28 kernel: [ 351.570861] Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. May 18 23:37:28 systemd[1]: bird.service: Main process exited, code=killed, status=11/SEGV May 18 23:37:28 systemd[1]: bird.service: Failed with result 'signal'. May 18 23:37:28 systemd[1]: bird.service: Consumed 7.387s CPU time. May 18 23:37:28 systemd[1]: bird.service: Scheduled restart job, restart counter is at 26. May 18 23:37:28 systemd[1]: Stopped BIRD Internet Routing Daemon. May 18 23:37:28 systemd[1]: bird.service: Consumed 7.387s CPU time. May 18 23:37:28 systemd[1]: Starting BIRD Internet Routing Daemon...

The sp value changes on each iteration

On Sun, 18 May 2025 at 05:21, Nicolas Lorin<androw95220@gmail.com> wrote:

...

Hi,

I've tried to upgrade from 3.1.0 to 3.1.1 but bird daemon is crashing with a segv after some seconds. I haven't made any change to my config. Reverting to 3.1.0 fixes the problem.

Running Ubuntu 24.04.02.

I'm using BGP/OSPF/Kernel/Static/Direct/RPKI.

I haven't had the time yet to narrow the problem down but wanted to let you know.

I'll try to investigate with a limited config if I find time.

Regards,

-- Nicolas Lorin

Dear Robert, thank you for the input. We are looking into that as a priority. We will announce once we have a solution or fix. Kind regards, Jana Jana Babovakova (she/her) | BIRD Tech Support | CZ.NIC, z.s.p.o. On 20. 05. 25 16:38, Robert Scheck wrote:

Hello Jana,

On Mon, 19 May 2025, Jana Babovakova via Bird-users wrote:

...

Thank you for reporting this to us. Please send us your config files and we will look into that. For a private message please usebird-support@network.cz I unfortunately can confirm the same issue with just Kernel/Static/BGP/RPKI for BIRD 3.1.1 after upgrading from BIRD 2.16.2:

May 20 16:28:40 kernel: bird[2099507]: segfault at 0 ip 0000000000000000 sp 00007f67fe7f94e8 error 14 in bird[5601e078b000+14000] likely on CPU 3 (core 3, socket 0) May 20 16:28:40 kernel: Code: Unable to access opcode bytes at 0xffffffffffffffd6.

May 20 16:32:15 kernel: bird[2100172]: segfault at 0 ip 0000000000000000 sp 00007efd0df1d4e8 error 14 in bird[55d335e3c000+14000] likely on CPU 9 (core 1, socket 1) May 20 16:32:15 kernel: Code: Unable to access opcode bytes at 0xffffffffffffffd6.

May 20 16:32:42 kernel: bird[2100210]: segfault at 0 ip 0000000000000000 sp 00007efc0231d4e8 error 14 in bird[55f6f6400000+14000] likely on CPU 9 (core 1, socket 1) May 20 16:32:42 kernel: Code: Unable to access opcode bytes at 0xffffffffffffffd6.

I will also provide our configuration via e-mail. Hopefully it helps to narrow down the issue.

Please let me know if you need any further information.

Kind regards

Robert Scheck