Re: [PATCH bpf-next 2/2] selftests/bpf: Add tests for bpf_sockopt is_compat field

selftests/bpf: Add tests for bpf_sockopt is_compat field

Sync tools/include/uapi/linux/bpf.h with the addition of the 'is_compat'
field in 'struct bpf_sockopt' and add test cases to 'prog_tests/sockopt.c'
to verify context access permissions:

 - Test reading 'ctx->is_compat' in 'cgroup/{g,s}etsockopt'
   (expecting 0 in native execution).
 - Check verifier rejects writes to 'ctx->is_compat'
   in 'cgroup/{g,s}etsockopt'.

Tested via:
  tools/testing/selftests/bpf/vmtest.sh -- ./test_progs -t sockopt

This isn't a bug, but would it be worth separating the 'Tested via:'
line with a blank line and saying explicitly that the compat==1 path is
not reachable from a native test_progs build, so readers know what the
new cases do and do not cover?


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AI reviewed your patch. Please fix the bug or email reply why it's not a bug.
See: https://github.com/kernel-patches/vmtest/blob/master/ci/claude/README.md

CI run summary: https://github.com/kernel-patches/bpf/actions/runs/31696027015