diff --git a/samples/bpf/libbpf.h b/samples/bpf/libbpf.h
index ac6edb61b64a..de96a935068d 100644
--- a/samples/bpf/libbpf.h
+++ b/samples/bpf/libbpf.h
@@ -18,7 +18,7 @@ int bpf_prog_load(enum bpf_prog_type prog_type,
 int bpf_obj_pin(int fd, const char *pathname);
 int bpf_obj_get(const char *pathname);
 
-#define LOG_BUF_SIZE 65536
+#define LOG_BUF_SIZE (256 * 1024)
 extern char bpf_log_buf[LOG_BUF_SIZE];
 
 /* ALU ops on registers, bpf_add|sub|...: dst_reg += src_reg */
diff --git a/samples/bpf/sockex2_kern.c b/samples/bpf/sockex2_kern.c
index 44e5846c988f..f58acfc92556 100644
--- a/samples/bpf/sockex2_kern.c
+++ b/samples/bpf/sockex2_kern.c
@@ -198,7 +198,7 @@ struct bpf_map_def SEC("maps") hash_map = {
 SEC("socket2")
 int bpf_prog2(struct __sk_buff *skb)
 {
-	struct bpf_flow_keys flow;
+	struct bpf_flow_keys flow = {};
 	struct pair *value;
 	u32 key;