[PATCH] selftests: bpf: add malloc failures checks in bpf_iter

[Yuran Pereira]

Since some malloc calls in bpf_iter may at times fail,
this patch adds the appropriate fail checks, and ensures that
any previously allocated resource is appropriately destroyed
before returning the function.

Signed-off-by: Yuran Pereira <yuran.pereira@xxxxxxxxxxx>
---
 tools/testing/selftests/bpf/prog_tests/bpf_iter.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c
index 1f02168103dd..6d47ea9211a4 100644
--- a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c
+++ b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c
@@ -878,6 +878,11 @@ static void test_bpf_percpu_hash_map(void)
 
 	skel->rodata->num_cpus = bpf_num_possible_cpus();
 	val = malloc(8 * bpf_num_possible_cpus());
+	if (CHECK(!val, "malloc", "memory allocation failed: %s",
+				strerror(errno))) {
+		bpf_iter_bpf_percpu_hash_map__destroy(skel);
+		return;
+	}
 
 	err = bpf_iter_bpf_percpu_hash_map__load(skel);
 	if (!ASSERT_OK_PTR(skel, "bpf_iter_bpf_percpu_hash_map__load"))
@@ -1057,6 +1062,11 @@ static void test_bpf_percpu_array_map(void)
 
 	skel->rodata->num_cpus = bpf_num_possible_cpus();
 	val = malloc(8 * bpf_num_possible_cpus());
+	if (CHECK(!val, "malloc", "memory allocation failed: %s",
+				strerror(errno))) {
+		bpf_iter_bpf_percpu_hash_map__destroy(skel);
+		return;
+	}
 
 	err = bpf_iter_bpf_percpu_array_map__load(skel);
 	if (!ASSERT_OK_PTR(skel, "bpf_iter_bpf_percpu_array_map__load"))
-- 
2.25.1