Missing syscall tracing facility

[arilou]

Description

On the arm64 images there is a missing config which does not produce the syscalls tracepoints CONFIG_FTRACE_SYSCALLS.
(It does exist on the amd64 config, so the issue is for the arm64 images only)

Impact

These tracepoints are used by different security and observability tools, with the lack of these tracepoints they fail to operate the way they should.
(Mainly used as a BPF hook on the tracepoint)

Environment and steps to reproduce

Arm64 machines with one of flatcar kernels

Check that all the syscall tracepoints exist

ls -l /sys/kernel/tracing/events/syscalls/

Should list each syscall tracepoint (enter and exit for each one)

Expected behavior

The syscall tracepoints should be compiled and available (check /sys/kernel/tracing/events/syscalls/)

[tormath1]

Hello and thanks for raising this. I don't see any counter indication to not enable this on ARM64 platform.

Would you be interested to do the contribution yourself? It's just a matter of moving this line:
https://github.com/flatcar/scripts/blob/8d418321dd129f529f27ab0b79c75d780a220f86/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-modules/files/amd64_defconfig-6.6#L44

To this file: https://github.com/flatcar/scripts/blob/main/sdk_container/src/third_party/coreos-overlay/sys-kernel/coreos-modules/files/commonconfig-6.6

Then I'll kick-off a build for you to test if works as expected.

[arilou]

Thank you @tormath1 I sent a PR
flatcar/scripts#2600