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 <fcntl.h>
18
19 #include <functional>
20 #include <type_traits>
21
22 #include <android/content/AttributionSourceState.h>
23 #include "fuzzer/FuzzedDataProvider.h"
24 #include "mediautils/ServiceUtilities.h"
25
26 static constexpr int kMaxOperations = 50;
27 static constexpr int kMaxStringLen = 256;
28
29 using android::content::AttributionSourceState;
30
31 const std::vector<std::function<void(FuzzedDataProvider*, android::MediaPackageManager)>>
32 operations = {
__anon43666a650102() 33 [](FuzzedDataProvider* data_provider, android::MediaPackageManager pm) -> void {
34 uid_t uid = data_provider->ConsumeIntegral<uid_t>();
35 pm.allowPlaybackCapture(uid);
36 },
__anon43666a650202() 37 [](FuzzedDataProvider* data_provider, android::MediaPackageManager pm) -> void {
38 int spaces = data_provider->ConsumeIntegral<int>();
39
40 // Dump everything into /dev/null
41 int fd = open("/dev/null", O_WRONLY);
42 pm.dump(fd, spaces);
43 close(fd);
44 },
45 };
46
LLVMFuzzerTestOneInput(const uint8_t * data,size_t size)47 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
48 FuzzedDataProvider data_provider(data, size);
49 int32_t uid = data_provider.ConsumeIntegral<int32_t>();
50 int32_t pid = data_provider.ConsumeIntegral<int32_t>();
51 audio_source_t source = static_cast<audio_source_t>(data_provider
52 .ConsumeIntegral<std::underlying_type_t<audio_source_t>>());
53
54 std::string packageNameStr = data_provider.ConsumeRandomLengthString(kMaxStringLen);
55 std::string msgStr = data_provider.ConsumeRandomLengthString(kMaxStringLen);
56 android::String16 msgStr16(packageNameStr.c_str());
57 AttributionSourceState attributionSource;
58 attributionSource.packageName = packageNameStr;
59 attributionSource.uid = uid;
60 attributionSource.pid = pid;
61 attributionSource.token = android::sp<android::BBinder>::make();
62
63 // There is not state here, and order is not significant,
64 // so we can simply call all of the target functions
65 android::isServiceUid(uid);
66 android::isAudioServerUid(uid);
67 android::isAudioServerOrSystemServerUid(uid);
68 android::isAudioServerOrMediaServerUid(uid);
69 android::recordingAllowed(attributionSource);
70 android::startRecording(attributionSource, msgStr16, source);
71 android::finishRecording(attributionSource, source);
72 android::captureAudioOutputAllowed(attributionSource);
73 android::captureMediaOutputAllowed(attributionSource);
74 android::captureHotwordAllowed(attributionSource);
75 android::modifyPhoneStateAllowed(attributionSource);
76 android::bypassInterruptionPolicyAllowed(attributionSource);
77 android::settingsAllowed();
78 android::modifyAudioRoutingAllowed();
79 android::modifyDefaultAudioEffectsAllowed();
80 android::dumpAllowed();
81
82 // MediaPackageManager does have state, so we need the fuzzer to decide order
83 android::MediaPackageManager packageManager;
84 size_t ops_run = 0;
85 while (data_provider.remaining_bytes() > 0 && ops_run++ < kMaxOperations) {
86 uint8_t op = data_provider.ConsumeIntegralInRange<uint8_t>(0, operations.size() - 1);
87 operations[op](&data_provider, packageManager);
88 }
89
90 return 0;
91 }
92