This change restores interpreter fallback capability for BPF programs with stack size <= 512 bytes when jit fails. Add selftest for socket filter to test it.
changes: v2: - Addressed comments from Alexei - Add selftest v1: https://lore.kernel.org/all/20250805115513.4018532-1-kafai....@linux.dev/ --- KaFai Wan (2): bpf: Allow fall back to interpreter for programs with stack size <= 512 selftests/bpf: Add socket filter attach test kernel/bpf/core.c | 16 ++- .../selftests/bpf/prog_tests/socket_filter.c | 124 ++++++++++++++++++ .../selftests/bpf/progs/socket_filter.c | 16 +++ 3 files changed, 149 insertions(+), 7 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/socket_filter.c create mode 100644 tools/testing/selftests/bpf/progs/socket_filter.c -- 2.43.0
