1 /*
2 * Copyright (C) 2022 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <MtpDevHandle.h>
18 #include <MtpEventPacket.h>
19 #include <MtpPacketFuzzerUtils.h>
20 #include <functional>
21 #include <fuzzer/FuzzedDataProvider.h>
22
23 using namespace android;
24
25 class MtpEventPacketFuzzer : MtpPacketFuzzerUtils {
26 public:
MtpEventPacketFuzzer(const uint8_t * data,size_t size)27 MtpEventPacketFuzzer(const uint8_t* data, size_t size) : mFdp(data, size) {
28 mUsbDevFsUrb = (struct usbdevfs_urb*)malloc(sizeof(struct usbdevfs_urb) +
29 sizeof(struct usbdevfs_iso_packet_desc));
30 };
~MtpEventPacketFuzzer()31 ~MtpEventPacketFuzzer() { free(mUsbDevFsUrb); };
32 void process();
33
34 private:
35 FuzzedDataProvider mFdp;
36 };
37
process()38 void MtpEventPacketFuzzer::process() {
39 MtpEventPacket mtpEventPacket;
40 while (mFdp.remaining_bytes() > 0) {
41 auto mtpEventAPI = mFdp.PickValueInArray<const std::function<void()>>({
42 [&]() { mtpEventPacket.allocate(mFdp.ConsumeIntegralInRange(kMinSize, kMaxSize)); },
43 [&]() { mtpEventPacket.reset(); },
44 [&]() { writeHandle(&mtpEventPacket, &mFdp); },
45 [&]() {
46 fillFilePath(&mFdp);
47 int32_t fd = memfd_create(mPath.c_str(), MFD_ALLOW_SEALING);
48 fillUsbRequest(fd, &mFdp);
49 mUsbRequest.dev = usb_device_new(mPath.c_str(), fd);
50 mtpEventPacket.sendRequest(&mUsbRequest);
51 usb_device_close(mUsbRequest.dev);
52 },
53 [&]() {
54 fillFilePath(&mFdp);
55 int32_t fd = memfd_create(mPath.c_str(), MFD_ALLOW_SEALING);
56 fillFd(fd, &mFdp);
57 struct usb_device* device = usb_device_new(mPath.c_str(), fd);
58 mtpEventPacket.readResponse(device);
59 usb_device_close(device);
60 },
61 });
62 mtpEventAPI();
63 }
64 }
65
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)66 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
67 MtpEventPacketFuzzer mtpEventPacketFuzzer(data, size);
68 mtpEventPacketFuzzer.process();
69 return 0;
70 }
71