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// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <fuzzer/FuzzedDataProvider.h>
#include <algorithm>
#include <cstddef>
#include <cstdint>
#include "libusb/libusb.h"
#include "libusb/libusbi.h"
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
struct libusb_transfer *transfer = NULL;
FuzzedDataProvider stream(data, size);
uint8_t bmRequestType = stream.ConsumeIntegral<uint8_t>();
uint8_t bRequest = stream.ConsumeIntegral<uint8_t>();
uint16_t wValue = stream.ConsumeIntegral<uint16_t>();
uint16_t wIndex = stream.ConsumeIntegral<uint16_t>();
uint16_t wLength = stream.ConsumeIntegral<uint16_t>();
std::string input = stream.ConsumeRandomLengthString();
const char *d = input.c_str();
transfer = libusb_alloc_transfer(0);
if (!transfer) {
return LIBUSB_ERROR_NO_MEM;
}
libusb_fill_control_setup((unsigned char *)d, bmRequestType, bRequest, wValue, wIndex, wLength);
// Cleanup.
// We cannot call libusb_free_transfer as no callbacks has occurred. Calling
// libusb_free_transfer without this will trigger false positive errors.
struct usbi_transfer *itransfer = LIBUSB_TRANSFER_TO_USBI_TRANSFER(transfer);
usbi_mutex_destroy(&itransfer->lock);
size_t priv_size = PTR_ALIGN(usbi_backend.transfer_priv_size);
unsigned char *ptr = (unsigned char *)itransfer - priv_size;
free(ptr);
return 0;
}
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