1 /*
2 * Copyright 2020 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 <sys/select.h>
18
19 #include <iostream>
20
21 #include <utils/Looper.h>
22
23 #include "Looper_test_pipe.h"
24 #include "fuzzer/FuzzedDataProvider.h"
25
26 using android::Looper;
27 using android::sp;
28
29 // We don't want this to bog down fuzzing
30 static constexpr int MAX_POLL_DELAY = 50;
31 static constexpr int MAX_OPERATIONS = 500;
32
doNothing()33 void doNothing() {}
34 void* doNothingPointer = reinterpret_cast<void*>(doNothing);
35
noopCallback(int,int,void *)36 static int noopCallback(int, int, void*) {
37 return 0;
38 }
39
40 std::vector<std::function<void(FuzzedDataProvider*, sp<Looper>, Pipe)>> operations = {
__anonda8a39c00102() 41 [](FuzzedDataProvider* dataProvider, sp<Looper> looper, Pipe) -> void {
42 looper->pollOnce(dataProvider->ConsumeIntegralInRange<int>(0, MAX_POLL_DELAY));
43 },
__anonda8a39c00202() 44 [](FuzzedDataProvider* dataProvider, sp<Looper> looper, Pipe) -> void {
45 looper->pollAll(dataProvider->ConsumeIntegralInRange<int>(0, MAX_POLL_DELAY));
46 },
47 // events and callback are nullptr
__anonda8a39c00302() 48 [](FuzzedDataProvider* dataProvider, sp<Looper> looper, Pipe pipeObj) -> void {
49 looper->addFd(pipeObj.receiveFd, dataProvider->ConsumeIntegral<int>(),
50 dataProvider->ConsumeIntegral<int>(), nullptr, nullptr);
51 },
52 // Events is nullptr
__anonda8a39c00402() 53 [](FuzzedDataProvider* dataProvider, sp<Looper> looper, Pipe pipeObj) -> void {
54 looper->addFd(pipeObj.receiveFd, dataProvider->ConsumeIntegral<int>(),
55 dataProvider->ConsumeIntegral<int>(), noopCallback, nullptr);
56 },
57 // callback is nullptr
__anonda8a39c00502() 58 [](FuzzedDataProvider* dataProvider, sp<Looper> looper, Pipe pipeObj) -> void {
59 looper->addFd(pipeObj.receiveFd, dataProvider->ConsumeIntegral<int>(),
60 dataProvider->ConsumeIntegral<int>(), nullptr, doNothingPointer);
61 },
62 // callback and events both set
__anonda8a39c00602() 63 [](FuzzedDataProvider* dataProvider, sp<Looper> looper, Pipe pipeObj) -> void {
64 looper->addFd(pipeObj.receiveFd, dataProvider->ConsumeIntegral<int>(),
65 dataProvider->ConsumeIntegral<int>(), noopCallback, doNothingPointer);
66 },
67
__anonda8a39c00702() 68 [](FuzzedDataProvider*, sp<Looper> looper, Pipe) -> void { looper->wake(); },
__anonda8a39c00802() 69 [](FuzzedDataProvider*, sp<Looper>, Pipe pipeObj) -> void { pipeObj.writeSignal(); }};
70
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)71 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
72 Pipe pipeObj;
73 FuzzedDataProvider dataProvider(data, size);
74 sp<Looper> looper = new Looper(dataProvider.ConsumeBool());
75
76 size_t opsRun = 0;
77 while (dataProvider.remaining_bytes() > 0 && opsRun++ < MAX_OPERATIONS) {
78 uint8_t op = dataProvider.ConsumeIntegralInRange<uint8_t>(0, operations.size() - 1);
79 operations[op](&dataProvider, looper, pipeObj);
80 }
81 // Clear our pointer
82 looper.clear();
83 return 0;
84 }
85