[PATCHv2 bpf-next 2/5] selftests/bpf: Add test to access int ptr argument in tracing program
flat view
STALE1778d
LANDED
From: Jiri Olsa <hidden>
Date: 2021-12-08 19:33:04
Also in:
bpf
Subsystem:
bpf [general] (safe dynamic programs and tools), bpf [selftests] (test runners & infrastructure), kernel selftest framework, the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Shuah Khan, Shuah Khan, Linus Torvalds
Status: Landed in mainline as 2b070c2bc885 on 2021-12-13.
Revision v2 (2 revisions archived).
Revisions (2)
- v1
- v2 current [diff against previous]
Adding verifier test for accessing int pointer argument in tracing programs. The test program loads 2nd argument of bpf_modify_return_test function which is int pointer and checks that verifier allows that. Signed-off-by: Jiri Olsa <jolsa@kernel.org> --- .../testing/selftests/bpf/verifier/btf_ctx_access.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 tools/testing/selftests/bpf/verifier/btf_ctx_access.c
diff --git a/tools/testing/selftests/bpf/verifier/btf_ctx_access.c b/tools/testing/selftests/bpf/verifier/btf_ctx_access.c
new file mode 100644
index 000000000000..6340db6b46dc
--- /dev/null
+++ b/tools/testing/selftests/bpf/verifier/btf_ctx_access.c@@ -0,0 +1,12 @@ +{ + "btf_ctx_access accept", + .insns = { + BPF_LDX_MEM(BPF_W, BPF_REG_2, BPF_REG_1, 8), /* load 2nd argument value (int pointer) */ + BPF_MOV64_IMM(BPF_REG_0, 0), + BPF_EXIT_INSN(), + }, + .result = ACCEPT, + .prog_type = BPF_PROG_TYPE_TRACING, + .expected_attach_type = BPF_TRACE_FENTRY, + .kfunc = "bpf_modify_return_test", +},
--
2.33.1