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 <MtpPacketFuzzerUtils.h>
19 #include <MtpResponsePacket.h>
20 #include <functional>
21 #include <fuzzer/FuzzedDataProvider.h>
22
23 using namespace android;
24
25 class MtpResponsePacketFuzzer : MtpPacketFuzzerUtils {
26 public:
MtpResponsePacketFuzzer(const uint8_t * data,size_t size)27 MtpResponsePacketFuzzer(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 };
~MtpResponsePacketFuzzer()31 ~MtpResponsePacketFuzzer() { free(mUsbDevFsUrb); };
32 void process();
33
34 private:
35 FuzzedDataProvider mFdp;
36 };
37
process()38 void MtpResponsePacketFuzzer::process() {
39 MtpResponsePacket mtpResponsePacket;
40 while (mFdp.remaining_bytes() > 0) {
41 auto mtpResponseAPI = mFdp.PickValueInArray<const std::function<void()>>({
42 [&]() {
43 mtpResponsePacket.allocate(
44 mFdp.ConsumeIntegralInRange(kMinSize, kMaxSize)); /*size*/
45 },
46 [&]() { mtpResponsePacket.reset(); },
47 [&]() { writeHandle(&mtpResponsePacket, &mFdp); },
48 [&]() {
49 fillFilePath(&mFdp);
50 int32_t fd = memfd_create(mPath.c_str(), MFD_ALLOW_SEALING);
51 fillUsbRequest(fd, &mFdp);
52 mUsbRequest.dev = usb_device_new(mPath.c_str(), fd);
53 mtpResponsePacket.read(&mUsbRequest);
54 usb_device_close(mUsbRequest.dev);
55 },
56 });
57 mtpResponseAPI();
58 }
59 }
60
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)61 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
62 MtpResponsePacketFuzzer mtpResponsePacketFuzzer(data, size);
63 mtpResponsePacketFuzzer.process();
64 return 0;
65 }
66