1 /*
2 * Copyright (c) 2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "time_broker_fuzzer.h"
17 #include "camera_log.h"
18 #include "message_parcel.h"
19 #include "securec.h"
20 #include <memory>
21 #include "timer.h"
22
23 namespace OHOS {
24 namespace CameraStandard {
25 using namespace DeferredProcessing;
26 static constexpr int32_t MAX_CODE_LEN = 512;
27 static constexpr int32_t MIN_SIZE_NUM = 4;
28 static const uint8_t* RAW_DATA = nullptr;
29 const size_t THRESHOLD = 10;
30 static size_t g_dataSize = 0;
31 static size_t g_pos;
32 std::shared_ptr<TimeBroker> TimeBrokerFuzzer::fuzz_{nullptr};
33
34 /*
35 * describe: get data from outside untrusted data(g_data) which size is according to sizeof(T)
36 * tips: only support basic type
37 */
38 template<class T>
GetData()39 T GetData()
40 {
41 T object {};
42 size_t objectSize = sizeof(object);
43 if (RAW_DATA == nullptr || objectSize > g_dataSize - g_pos) {
44 return object;
45 }
46 errno_t ret = memcpy_s(&object, objectSize, RAW_DATA + g_pos, objectSize);
47 if (ret != EOK) {
48 return {};
49 }
50 g_pos += objectSize;
51 return object;
52 }
53
54 template<class T>
GetArrLength(T & arr)55 uint32_t GetArrLength(T& arr)
56 {
57 if (arr == nullptr) {
58 MEDIA_INFO_LOG("%{public}s: The array length is equal to 0", __func__);
59 return 0;
60 }
61 return sizeof(arr) / sizeof(arr[0]);
62 }
63
TimeBrokerFuzzTest()64 void TimeBrokerFuzzer::TimeBrokerFuzzTest()
65 {
66 if ((RAW_DATA == nullptr) || (g_dataSize > MAX_CODE_LEN) || (g_dataSize < MIN_SIZE_NUM)) {
67 return;
68 }
69
70 fuzz_ = TimeBroker::Create("camera_deferred_base");
71 CHECK_ERROR_RETURN_LOG(!fuzz_, "Create fuzz_ Error");
72 fuzz_->Initialize();
73 uint32_t handle = fuzz_->GenerateHandle();
74 std::function<void(uint32_t handle)> timerCallback = fuzz_->GetExpiredFunc(handle);
75 fuzz_->GetNextHandle(handle);
76 uint32_t delayTimeMs = 1;
77 bool force = GetData<bool>();
78 fuzz_->RegisterCallback(delayTimeMs, timerCallback, handle);
79 fuzz_->RestartTimer(force);
80 fuzz_->TimerExpired();
81 fuzz_->DeregisterCallback(handle);
82 }
83
Test()84 void Test()
85 {
86 auto timeBroker = std::make_unique<TimeBrokerFuzzer>();
87 if (timeBroker == nullptr) {
88 MEDIA_INFO_LOG("TimeBroker is null");
89 return;
90 }
91 timeBroker->TimeBrokerFuzzTest();
92 }
93
94 typedef void (*TestFuncs[1])();
95
96 TestFuncs g_testFuncs = {
97 Test,
98 };
99
FuzzTest(const uint8_t * rawData,size_t size)100 bool FuzzTest(const uint8_t* rawData, size_t size)
101 {
102 // initialize data
103 RAW_DATA = rawData;
104 g_dataSize = size;
105 g_pos = 0;
106
107 uint32_t code = GetData<uint32_t>();
108 uint32_t len = GetArrLength(g_testFuncs);
109 if (len > 0) {
110 g_testFuncs[code % len]();
111 } else {
112 MEDIA_INFO_LOG("%{public}s: The len length is equal to 0", __func__);
113 }
114
115 return true;
116 }
117 } // namespace CameraStandard
118 } // namespace OHOS
119
120 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(uint8_t * data,size_t size)121 extern "C" int LLVMFuzzerTestOneInput(uint8_t* data, size_t size)
122 {
123 if (size < OHOS::CameraStandard::THRESHOLD) {
124 return 0;
125 }
126
127 OHOS::CameraStandard::FuzzTest(data, size);
128 return 0;
129 }