1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
|
/**
* Copyright (C) 2019-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/base/data_range_cursor.h"
#include "mongo/bson/bson_validate.h"
#include "mongo/db/dbmessage.h"
#include "mongo/db/ops/write_ops.h"
#include "mongo/rpc/factory.h"
#include "mongo/rpc/message.h"
#include "mongo/transport/message_compressor_manager.h"
#include "mongo/transport/message_compressor_noop.h"
#include "mongo/transport/message_compressor_registry.h"
#include "mongo/util/shared_buffer.h"
namespace mongo {
struct CompressionInfrastructure {
CompressionInfrastructure() : manager(®istry) {
registry.setSupportedCompressors({"noop"});
registry.registerImplementation(std::make_unique<NoopMessageCompressor>());
uassertStatusOK(registry.finalizeSupportedCompressors());
}
MessageCompressorRegistry registry;
MessageCompressorManager manager;
};
void validateBSON(const BSONObj& obj) {
validateBSON(obj.objdata(), obj.objsize(), BSONVersion::kLatest).ignore();
}
void doFuzzing(ConstDataRangeCursor fuzzedData) try {
if (fuzzedData.length() < sizeof(MSGHEADER::Layout)) {
return;
}
// Make sure that we do BSON validation on all incoming messages
serverGlobalParams.objcheck = true;
auto sb = SharedBuffer::allocate(fuzzedData.length());
memcpy(sb.get(), fuzzedData.data(), fuzzedData.length());
Message msg(std::move(sb));
if (static_cast<size_t>(msg.size()) != fuzzedData.length()) {
return;
}
if (msg.operation() == dbCompressed) {
static CompressionInfrastructure compression = {};
msg = uassertStatusOK(compression.manager.decompressMessage(msg));
}
DbMessage dbMsgObj(msg);
switch (msg.operation()) {
case dbMsg: {
auto request = rpc::opMsgRequestFromAnyProtocol(msg);
validateBSON(request.body);
for (const auto& docSeq : request.sequences) {
for (const auto& doc : docSeq.objs) {
validateBSON(doc);
}
}
} break;
case dbUpdate: {
auto op = UpdateOp::parseLegacy(msg);
} break;
case dbInsert: {
auto op = InsertOp::parseLegacy(msg);
} break;
case dbDelete: {
auto op = DeleteOp::parseLegacy(msg);
}
case dbQuery: {
QueryMessage q(dbMsgObj);
} break;
// TODO these message types don't have discrete parsers. We should move their parsing out
// of the ServiceEntryPointCommon so we can actually
case dbGetMore:
case dbKillCursors:
break;
default:
invariant(!isSupportedRequestNetworkOp(msg.operation()));
break;
}
} catch (const DBException& e) {
// Ignore all errors from our assert macros
}
} // namespace mongo
extern "C" int LLVMFuzzerTestOneInput(const char* Data, size_t Size) {
mongo::doFuzzing(mongo::ConstDataRangeCursor(Data, Size));
return 0;
}
|
