1 /*
2 * Copyright (C) 2024 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 "host/commands/process_sandboxer/policies.h"
18
19 #include <sys/prctl.h>
20
21 #include "sandboxed_api/sandbox2/policybuilder.h"
22 #include "sandboxed_api/sandbox2/util/bpf_helper.h"
23 #include "sandboxed_api/util/path.h"
24
25 using sapi::file::JoinPath;
26
27 namespace cuttlefish {
28
LogcatReceiverPolicy(const HostInfo & host)29 sandbox2::PolicyBuilder LogcatReceiverPolicy(const HostInfo& host) {
30 auto exe = JoinPath(host.artifacts_path, "bin", "logcat_receiver");
31 auto lib64 = JoinPath(host.artifacts_path, "lib64");
32 return sandbox2::PolicyBuilder()
33 .AddDirectory(lib64)
34 .AddDirectory(host.log_dir, /* is_ro= */ false)
35 .AddFile(host.cuttlefish_config_path)
36 .AddLibrariesForBinary(exe, lib64)
37 // For dynamic linking
38 .AddPolicyOnSyscall(__NR_prctl,
39 {ARG_32(0), JEQ32(PR_CAPBSET_READ, ALLOW)})
40 .AllowDynamicStartup()
41 .AllowExit()
42 .AllowGetPIDs()
43 .AllowGetRandom()
44 .AllowHandleSignals()
45 .AllowMmap()
46 .AllowOpen()
47 .AllowRead()
48 .AllowReadlink()
49 .AllowRestartableSequences(sandbox2::PolicyBuilder::kAllowSlowFences)
50 .AllowSafeFcntl()
51 .AllowSyscall(__NR_tgkill)
52 .AllowWrite();
53 }
54
55 } // namespace cuttlefish
56