1 /*
2 * Copyright (c) 2022 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 "bgtaskonremoterequest_fuzzer.h"
17
18 #define private public
19 #include "background_task_mgr_service.h"
20 #include "background_task_mgr_stub.h"
21 #include "bg_continuous_task_mgr.h"
22 #include "iservice_registry.h"
23 #include "system_ability_definition.h"
24
25 namespace OHOS {
26 namespace BackgroundTaskMgr {
27 constexpr int32_t MIN_LEN = 4;
28 constexpr int32_t MAX_CODE_TEST = 15; // current max code is 13
29 std::mutex mutexLock;
30 sptr<IRemoteObject> remote;
31
DoInit()32 bool DoInit()
33 {
34 std::lock_guard<std::mutex> lock(mutexLock);
35 if (remote != nullptr) {
36 return true;
37 }
38 sptr<ISystemAbilityManager> SystemAbilityManager =
39 SystemAbilityManagerClient::GetInstance().GetSystemAbilityManager();
40 if (SystemAbilityManager == nullptr) {
41 return false;
42 }
43 remote = SystemAbilityManager->GetSystemAbility(BACKGROUND_TASK_MANAGER_SERVICE_ID);
44 if (remote == nullptr) {
45 return false;
46 }
47 return true;
48 }
49
OnRemoteRequest(uint32_t code,MessageParcel & data)50 int32_t OnRemoteRequest(uint32_t code, MessageParcel& data)
51 {
52 if (!DoInit()) {
53 return -1;
54 }
55 MessageParcel reply;
56 MessageOption option;
57 return remote->SendRequest(code, data, reply, option);
58 }
59
DoSomethingInterestingWithMyAPI(const uint8_t * data,size_t size)60 void DoSomethingInterestingWithMyAPI(const uint8_t* data, size_t size)
61 {
62 if (size <= MIN_LEN) {
63 return;
64 }
65
66 MessageParcel dataMessageParcel;
67 if (!dataMessageParcel.WriteInterfaceToken(BackgroundTaskMgrStub::GetDescriptor())) {
68 return;
69 }
70
71 uint32_t code = *(reinterpret_cast<const uint32_t*>(data));
72 if (code > MAX_CODE_TEST) {
73 return;
74 }
75 size -= sizeof(uint32_t);
76
77 dataMessageParcel.WriteBuffer(data + sizeof(uint32_t), size);
78 dataMessageParcel.RewindRead(0);
79
80 OnRemoteRequest(code, dataMessageParcel);
81 }
82 } // BackgroundTaskMgr
83 } // OHOS
84
85 /* Fuzzer entry point */
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)86 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
87 {
88 /* Run your code on data */
89 OHOS::BackgroundTaskMgr::DoSomethingInterestingWithMyAPI(data, size);
90 return 0;
91 }
92