selftests: bpf: initialize bpf_object pointers where needed

There are a few tests which call bpf_object__close on uninitialized
bpf_object*, which may segfault. Explicitly zero-initialise these pointers
to avoid this.

Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

tools/testing/selftests/bpf/prog_tests/bpf_verif_scale.c

@@ -15,7 +15,7 @@ static int libbpf_debug_print(enum libbpf_print_level level,
 static int check_load(const char *file)
 {
 	struct bpf_prog_load_attr attr;
-	struct bpf_object *obj;
+	struct bpf_object *obj = NULL;
 	int err, prog_fd;
 
 	memset(&attr, 0, sizeof(struct bpf_prog_load_attr));

tools/testing/selftests/bpf/prog_tests/task_fd_query_tp.c

@@ -9,7 +9,7 @@ static void test_task_fd_query_tp_core(const char *probe_name,
 	struct perf_event_attr attr = {};
 	__u64 probe_offset, probe_addr;
 	__u32 len, prog_id, fd_type;
-	struct bpf_object *obj;
+	struct bpf_object *obj = NULL;
 	__u32 duration = 0;
 	char buf[256];
 

tools/testing/selftests/bpf/prog_tests/tp_attach_query.c

@@ -13,6 +13,9 @@ void test_tp_attach_query(void)
 	struct bpf_prog_info prog_info;
 	char buf[256];
 
+	for (i = 0; i < num_progs; i++)
+		obj[i] = NULL;
+
 	snprintf(buf, sizeof(buf),
 		 "/sys/kernel/debug/tracing/events/sched/sched_switch/id");
 	efd = open(buf, O_RDONLY, 0);