Add missing checks for malloc/calloc/CloseHandle (#702)

Author: Megamouse

libusb/hid.c

@@ -1272,6 +1272,10 @@ hid_device * HID_API_EXPORT hid_open_path(const char *path)
 		return NULL;
 
 	dev = new_hid_device();
+	if (!dev) {
+		LOG("hid_open_path failed: Couldn't allocate memory\n");
+		return NULL;
+	}
 
 	libusb_get_device_list(usb_context, &devs);
 	while ((usb_dev = devs[d++]) != NULL && !good_open) {
@@ -1343,6 +1347,10 @@ HID_API_EXPORT hid_device * HID_API_CALL hid_libusb_wrap_sys_device(intptr_t sys
 		return NULL;
 
 	dev = new_hid_device();
+	if (!dev) {
+		LOG("libusb_wrap_sys_device failed: Couldn't allocate memory\n");
+		return NULL;
+	}
 
 	res = libusb_wrap_sys_device(usb_context, sys_dev, &dev->device_handle);
 	if (res < 0) {

windows/hid.c

@@ -1045,7 +1045,10 @@ HID_API_EXPORT hid_device * HID_API_CALL hid_open_path(const char *path)
 
 end_of_function:
 	free(interface_path);
-	CloseHandle(device_handle);
+
+	if (device_handle != INVALID_HANDLE_VALUE) {
+		CloseHandle(device_handle);
+	}
 
 	if (pp_data) {
 		HidD_FreePreparsedData(pp_data);
@@ -1085,8 +1088,15 @@ int HID_API_EXPORT HID_API_CALL hid_write(hid_device *dev, const unsigned char *
 		/* The user passed the right number of bytes. Use the buffer as-is. */
 		buf = (unsigned char *) data;
 	} else {
-		if (dev->write_buf == NULL)
+		if (dev->write_buf == NULL) {
 			dev->write_buf = (unsigned char *) malloc(dev->output_report_length);
+
+			if (dev->write_buf == NULL) {
+				register_string_error(dev, L"hid_write/malloc");
+				goto end_of_function;
+			}
+		}
+
 		buf = dev->write_buf;
 		memcpy(buf, data, length);
 		memset(buf + length, 0, dev->output_report_length - length);
@@ -1253,8 +1263,15 @@ int HID_API_EXPORT HID_API_CALL hid_send_feature_report(hid_device *dev, const u
 		buf = (unsigned char *) data;
 		length_to_send = length;
 	} else {
-		if (dev->feature_buf == NULL)
+		if (dev->feature_buf == NULL) {
 			dev->feature_buf = (unsigned char *) malloc(dev->feature_report_length);
+
+			if (dev->feature_buf == NULL) {
+				register_string_error(dev, L"hid_send_feature_report/malloc");
+				return -1;
+			}
+		}
+
 		buf = dev->feature_buf;
 		memcpy(buf, data, length);
 		memset(buf + length, 0, dev->feature_report_length - length);
@@ -1347,8 +1364,15 @@ int HID_API_EXPORT HID_API_CALL hid_send_output_report(hid_device* dev, const un
 		buf = (unsigned char *) data;
 		length_to_send = length;
 	} else {
-		if (dev->write_buf == NULL)
+		if (dev->write_buf == NULL) {
 			dev->write_buf = (unsigned char *) malloc(dev->output_report_length);
+
+			if (dev->write_buf == NULL) {
+				register_string_error(dev, L"hid_send_output_report/malloc");
+				return -1;
+			}
+		}
+
 		buf = dev->write_buf;
 		memcpy(buf, data, length);
 		memset(buf + length, 0, dev->output_report_length - length);