bpf, selftests: Add ringbuf memory type confusion test

Add two tests, one which asserts that ring buffer memory can be passed to
other helpers for populating its entry area, and another one where verifier
rejects different type of memory passed to bpf_ringbuf_submit().

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/tools/testing/selftests/bpf/prog_tests/d_path.c b/tools/testing/selftests/bpf/prog_tests/d_path.c
index 32fc5b3b5cf6..911345c526e6 100644
--- a/tools/testing/selftests/bpf/prog_tests/d_path.c
+++ b/tools/testing/selftests/bpf/prog_tests/d_path.c
@@ -10,6 +10,7 @@
 
 #include "test_d_path.skel.h"
 #include "test_d_path_check_rdonly_mem.skel.h"
+#include "test_d_path_check_types.skel.h"
 
 static int duration;
 
@@ -167,6 +168,16 @@ static void test_d_path_check_rdonly_mem(void)
 	test_d_path_check_rdonly_mem__destroy(skel);
 }
 
+static void test_d_path_check_types(void)
+{
+	struct test_d_path_check_types *skel;
+
+	skel = test_d_path_check_types__open_and_load();
+	ASSERT_ERR_PTR(skel, "unexpected_load_passing_wrong_type");
+
+	test_d_path_check_types__destroy(skel);
+}
+
 void test_d_path(void)
 {
 	if (test__start_subtest("basic"))
@@ -174,4 +185,7 @@ void test_d_path(void)
 
 	if (test__start_subtest("check_rdonly_mem"))
 		test_d_path_check_rdonly_mem();
+
+	if (test__start_subtest("check_alloc_mem"))
+		test_d_path_check_types();
 }