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selftests/bpf: Add uprobe_multi path_fd fail tests

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Adding tests to attach_api_fails suite to make sure we fail
wrong setup for path_fd usage.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Link: https://lore.kernel.org/r/20260611114230.950379-7-jolsa@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Jiri Olsa 2026-06-11 13:42:29 +02:00 committed by Alexei Starovoitov
parent d5026e6bfc
commit 3229675be8
1 changed files with 31 additions and 1 deletions
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32
tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c
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@ -537,7 +537,37 @@ static void test_attach_api_fails(void)
link_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_UPROBE_MULTI, &opts);
if (!ASSERT_ERR(link_fd, "link_fd"))
goto cleanup;
ASSERT_EQ(link_fd, -EINVAL, "pid_is_wrong");
if (!ASSERT_EQ(link_fd, -EINVAL, "pid_is_wrong"))
goto cleanup;
/* wrong path_fd */
LIBBPF_OPTS_RESET(opts,
.uprobe_multi.path = NULL,
.uprobe_multi.path_fd = -1,
.uprobe_multi.flags = BPF_F_UPROBE_MULTI_PATH_FD,
.uprobe_multi.offsets = (unsigned long *)&offset,
.uprobe_multi.cnt = 1,
);
link_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_UPROBE_MULTI, &opts);
if (!ASSERT_ERR(link_fd, "link_fd"))
goto cleanup;
if (!ASSERT_EQ(link_fd, -EBADF, "path_fd_is_wrong"))
goto cleanup;
/* path and path_fd both set with BPF_F_UPROBE_MULTI_PATH_FD flag */
LIBBPF_OPTS_RESET(opts,
.uprobe_multi.path = path,
.uprobe_multi.path_fd = 1,
.uprobe_multi.flags = BPF_F_UPROBE_MULTI_PATH_FD,
.uprobe_multi.offsets = (unsigned long *)&offset,
.uprobe_multi.cnt = 1,
);
link_fd = bpf_link_create(prog_fd, 0, BPF_TRACE_UPROBE_MULTI, &opts);
if (!ASSERT_ERR(link_fd, "link_fd"))
goto cleanup;
ASSERT_EQ(link_fd, -EINVAL, "path_and_path_fd_together");
cleanup:
if (link_fd >= 0)