diff --git a/udfps/UdfpsHandler.cpp b/udfps/UdfpsHandler.cpp
index aa16d66..b9c98ff 100644
--- a/udfps/UdfpsHandler.cpp
+++ b/udfps/UdfpsHandler.cpp
@@ -62,24 +62,23 @@ static bool readBool(int fd) {
 }
 
 static disp_event_resp* parseDispEvent(int fd) {
-    disp_event header;
-    ssize_t headerSize = read(fd, &header, sizeof(header));
-    if (headerSize < sizeof(header)) {
-        LOG(ERROR) << "unexpected display event header size: " << headerSize;
+    char event_data[1024] = {0};
+    ssize_t size;
+
+    memset(event_data, 0x0, sizeof(event_data));
+    size = read(fd, event_data, sizeof(event_data));
+    if (size < 0) {
+        LOG(ERROR) << "read fod event failed";
         return nullptr;
     }
 
-    struct disp_event_resp* response =
-            reinterpret_cast<struct disp_event_resp*>(malloc(header.length));
-    response->base = header;
-    int dataLength = response->base.length - sizeof(response->base);
-    ssize_t dataSize = read(fd, &response->data, dataLength);
-    if (dataSize < dataLength) {
-        LOG(ERROR) << "unexpected display event data size: " << dataSize;
+    if (size < sizeof(struct disp_event)) {
+        LOG(ERROR) << "Invalid event size " << size << ", expect at least "
+                   << sizeof(struct disp_event);
         return nullptr;
     }
 
-    return response;
+    return (struct disp_event_resp*)&event_data[0];
 }
 
 }  // anonymous namespace