arm64: bpf_generic_kprobe_v53.o fails to load

[vparla]

Is there an existing issue for this?

• I have searched the existing issues

Is your feature request related to a problem?

Support for bpf tail calls on ARM64 and documentation to describe platforms where it is not supported.

Describe the feature you would like

Hi - it appears that some #tetragon capabilities on arm64 do not function as expected. It looks to be related to BPF tail calls. Seems to be addressed in 6.0 version of the kernel. Is this a known limitation today in #tetragon?
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d4609a5d8c70d21b4a3f801cf896a3c16c613fe1

error="sensor gkp-sensor-1 from collection cat-open failed to load: failed prog /var/lib/tetragon/bpf_generic_kprobe_v53.o kern_version 331656 
loadInstance: opening collection '/var/lib/tetragon/bpf_generic_kprobe_v53.o' failed: program generic_kprobe_process_event4: 
load program: invalid argument: tail_calls are not allowed in non-JITed programs with bpf-to-bpf calls (292 line(s) omitted)"

Describe your proposed solution

Document support plans for this and limitations in the current Tetragon solution.

Code of Conduct

• I agree to follow this project's Code of Conduct

[mtardy]

Hello, could you please give us more information on which kernel you tried, with which configuration? We need to reproduce this to gather more information and understand what's happening here.

[jrfastab]

If you have the policy adding it here would help. Its a bug we should fix it for sure.