Hello Matt,

[…] this is  the 3.1.2-cznic.1~trixie release, hopefully that’s enough to pull up the symbols for the positions here):

Without the corefile, we know nothing, sadly. The binaries are PIE and we need to know not only where they were mapped but also where glibc was mapped, how the stack(s) looked like and much more context.

OTOH, it looks like the corefile may be enough very soon, if our planned magic actually works. I’ll know hopefully at the end of this week.

At least once the same thing instead failed with

bird[617699]: Assertion ‘e->hook’ failed at lib/event.c:239

This one I managed to hit again by just blocking BFD with iptables making it go down.

And, finally, once only restarting bfd with restart bfd1: […]

With that, We’re now going to thoroughly check the BFD restart because that’s the most likely suspect.

Thanks for your reports!

Maria

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Maria Matejka (she/her) | BIRD Team Leader | CZ.NIC, z.s.p.o.