Hello David, Here is the coredump: https://herbizarre.swordarmor.fr/garbage/core-bird.29074.rr3.swordarmor.fr.1... And here is the config: https://herbizarre.swordarmor.fr/garbage/bird.conf.29074.rr3.swordarmor.fr.1... I compiled bird3 with the two previous patches of this ML: * Applying bird-3.0.0-nest-rt-table.c.patch ... * Applying bird-3.0.0-proto-lock.patch ... And I enabled the debug: ./configure --prefix=/usr --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib --datarootdir=/usr/share --docdir=/usr/share/doc/bird-3.0.0 --htmldir=/usr/share/doc/bird-3.0.0/html --libdir=/usr/lib64 --localstatedir=/var --enable-client --enable-debug --disable-libssh So I have a different trace in dmesg (I supposed that it’s due to having debug symbols): [1305799.952226] bird[29075]: segfault at 8 ip 000055861e8cb989 sp 00007f13ab6e0b40 error 4 in bird[55861e7ed000+15c000] [1305799.952251] Code: 89 c7 e8 13 80 ff ff 89 85 6c ff ff ff 48 8b 45 c0 48 89 c7 e8 2d f3 ff ff 89 85 70 ff ff ff 48 83 7d b0 00 74 18 48 8b 45 b0 <0f> b6 00 0f b6 c0 83 e0 01 85 c0 74 07 b8 01 00 00 00 eb 05 b8 00 Regarding the setup, I don’t think that it’s that unconventional, but it’s a RR outside of the network (it’s on my own network which is pretty much experimental, so I experiment). I noticed that I never removed the OSPF from the kernel filters until now, but even with 'export none' I still get the crash. So I then tried to enable all the debug options: rr3 ~ # grep debug /etc/bird.conf debug protocols all; debug channels all; debug tables all; And here are the logs: https://paste.swordarmor.fr/raw/Owej I hope it’s useful, don’t hesitate to ask me if you need anything else. Happy new year to you too! Alarig On Mon 30 Dec 2024 16:49:41 GMT, David Petera wrote:
Hello Alarig,
thanks for reporting!
The coredump and config would be much appreciated, so I can try to reproduce it. Also would you say there is something unconventional about the said setup that might be causing the problem?
Thanks in advance and happy new year,
David
On 12/19/24 19:16, Alarig Le Lay via Bird-users wrote:
Hello Maria,
I thought that I had the same bug, but it seems that it’s a different one as I applied the patch but I still got a segfault at startup.
[342115.227497] bird[19396]: segfault at 8 ip 00005642c37062db sp 00007fc784295ca0 error 4 in bird[5642c366e000+f0000] [342115.227524] Code: 39 10 0f 85 e3 8c f6 ff 48 8b 90 b0 01 00 00 8b 8a 10 01 00 00 89 4c 24 24 85 c9 0f 84 d6 00 00 00 4d 85 ff 0f 84 e0 00 00 00 <41> 0f b6 44 24 08 89 c2 83 e2 01 4d 85 ed 75 15 83 c8 01 41 88 44
I can generate a coredump and share my configuration if needed.
Alarig
On Thu 19 Dec 2024 16:14:18 GMT, Radu Anghel via Bird-users wrote:
Hi Maria,
I tried the patch and I can confirm that it is now safe to kill and revive the bird :)
Thank you!
Best,
Radu
On 19.12.2024 13:38, Maria Matejka wrote:
Hello Radu,
sorry, this was a stupid omission of a null check. Fixed in b6caccfd45fb639b6dd3a8d140d3c5ba4cc79311 <https://gitlab.nic.cz/labs/ bird/-/tree/b6caccfd45fb639b6dd3a8d140d3c5ba4cc79311>. Could you please check that it works on your side now?
Thanks, Maria
On Wed, Dec 18, 2024 at 02:55:19PM +0100, Maria Matejka via Bird-users wrote:
We apparently missed this case in our test scenarios, so we’ll add one and check if it reproduces. We’ll ask for more info if we need it.
Congratulations to the first BIRD 3 bugreport and thanks for it!
On 18 December 2024 14:27:44 CET, Radu Anghel via Bird-users bird- users@network.cz <mailto:bird-users@network.cz> wrote:
Using a slightly modified version of the config from the 2.15.1 (just some {} inside case structures), but probably unrelated.
If bird gets killed/not shut down properly and routes remain in the kernel then bird 3.0.0 is unable to restart and just segfaults when trying to refresh kernel routes.
I can reproduce it by just kill -9 bird && restarting bird.
daemon.debug bird: KERNEL6.ipv6: route refresh begin: rr 1 set 1 valid 0 pruning 0 pruned 0
kern.info kernel: [75645.964935] bird[4162]: segfault at 0 ip 000000000045d47b sp 00007ffcb9f9f2c0 error 4 in bird[403000+a8000] likely on CPU 1 (core 0, socket 1)
kern.info kernel: [75645.970115] Code: 5d 41 5c 41 5d 41 5e 41 5f c3 55 53 48 89 fb 48 83 ec 38 80 bb 79 02 00 00 04 48 8b 7f 30 75 46 48 89 d5 31 d2 e8 63 a4 ff ff <83> 38 00 49 89 c0 75 07 31 c0 e9 9d 00 00 00 48 8b 40 10 48 8d 7b
The kernel protocol config is:
|protocol kernel KERNEL6 { debug { events, states }; scan time 3600; merge paths on; metric 0; ipv6 { import filter KERNEL_IN; export filter KERNEL_OUT; }; }|
– Maria Matejka (she/her) | BIRD Team Leader | CZ.NIC, z.s.p.o.
-- David Petera (he/him) | BIRD Tech Support | CZ.NIC, z.s.p.o.