From c1b93c07b3ac3204c6a42a7f7b6217e36f44df4f Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Wed, 6 Mar 2024 12:45:20 +0200 Subject: selftests/bpf: Bad_struct_ops test When loading struct_ops programs kernel requires BTF id of the struct_ops type and member index for attachment point inside that type. This makes impossible to use same BPF program in several struct_ops maps that have different struct_ops type. Check if libbpf rejects such BPF objects files. Signed-off-by: Eduard Zingerman Signed-off-by: Andrii Nakryiko Acked-by: Andrii Nakryiko Link: https://lore.kernel.org/bpf/20240306104529.6453-7-eddyz87@gmail.com --- .../selftests/bpf/prog_tests/bad_struct_ops.c | 35 ++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/bad_struct_ops.c (limited to 'tools/testing/selftests/bpf/prog_tests/bad_struct_ops.c') diff --git a/tools/testing/selftests/bpf/prog_tests/bad_struct_ops.c b/tools/testing/selftests/bpf/prog_tests/bad_struct_ops.c new file mode 100644 index 000000000000..9f5dbefa0dd9 --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/bad_struct_ops.c @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include "bad_struct_ops.skel.h" + +static void invalid_prog_reuse(void) +{ + struct bad_struct_ops *skel; + char *log = NULL; + int err; + + skel = bad_struct_ops__open(); + if (!ASSERT_OK_PTR(skel, "bad_struct_ops__open")) + return; + + if (start_libbpf_log_capture()) + goto cleanup; + + err = bad_struct_ops__load(skel); + log = stop_libbpf_log_capture(); + ASSERT_ERR(err, "bad_struct_ops__load should fail"); + ASSERT_HAS_SUBSTR(log, + "struct_ops init_kern testmod_2 func ptr test_1: invalid reuse of prog test_1", + "expected init_kern message"); + +cleanup: + free(log); + bad_struct_ops__destroy(skel); +} + +void test_bad_struct_ops(void) +{ + if (test__start_subtest("invalid_prog_reuse")) + invalid_prog_reuse(); +} -- cgit v1.2.3