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https://github.com/google/sandboxed-api.git
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dbaf95c724
This change should make it less confusing where utility code comes from. Having it in two places made sense when we were debating whether to publish Sandbox2 separately, but not any longer. Follow-up changes will move `sandbox2/util.h` and rename the remaining `sandbox2/util` folder. PiperOrigin-RevId: 351601640 Change-Id: I6256845261f610e590c25e2c59851cc51da2d778
113 lines
3.1 KiB
C++
113 lines
3.1 KiB
C++
// Copyright 2019 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "sandboxed_api/sandbox2/forkserver.h"
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <syscall.h>
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#include <unistd.h>
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#include <utility>
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#include <glog/logging.h>
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#include "gtest/gtest.h"
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#include "absl/strings/str_cat.h"
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#include "sandboxed_api/sandbox2/comms.h"
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#include "sandboxed_api/sandbox2/forkserver.pb.h"
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#include "sandboxed_api/sandbox2/global_forkclient.h"
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#include "sandboxed_api/sandbox2/ipc.h"
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#include "sandboxed_api/testing.h"
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namespace sandbox2 {
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using ::sapi::GetTestSourcePath;
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class IpcPeer {
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public:
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explicit IpcPeer(IPC* ipc) : ipc_{ipc} {}
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void SetUpServerSideComms(int fd) { ipc_->SetUpServerSideComms(fd); }
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private:
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IPC* ipc_;
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};
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int GetMinimalTestcaseFd() {
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const std::string path = GetTestSourcePath("sandbox2/testcases/minimal");
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return open(path.c_str(), O_RDONLY);
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}
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pid_t TestSingleRequest(Mode mode, int exec_fd, int userns_fd) {
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ForkRequest fork_req;
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IPC ipc;
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int sv[2];
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// Setup IPC
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PCHECK(socketpair(AF_UNIX, SOCK_STREAM, 0, sv) != -1);
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IpcPeer{&ipc}.SetUpServerSideComms(sv[1]);
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// Setup fork_req
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fork_req.set_mode(mode);
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fork_req.add_args("/binary");
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fork_req.add_envs("FOO=1");
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pid_t pid =
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GlobalForkClient::SendRequest(fork_req, exec_fd, sv[0], userns_fd);
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if (pid != -1) {
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VLOG(1) << "TestSingleRequest: Waiting for pid=" << pid;
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waitpid(pid, nullptr, 0);
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}
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close(sv[0]);
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return pid;
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}
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TEST(ForkserverTest, SimpleFork) {
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// Make sure that the regular fork request works.
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ASSERT_NE(TestSingleRequest(FORKSERVER_FORK, -1, -1), -1);
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}
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TEST(ForkserverTest, SimpleForkNoZombie) {
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// Make sure that we don't create zombies.
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pid_t child = TestSingleRequest(FORKSERVER_FORK, -1, -1);
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ASSERT_NE(child, -1);
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std::string proc = absl::StrCat("/proc/", child, "/cmdline");
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// Give the kernel some time to clean up.
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// Poll every 10ms up to 500 times (5s)
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bool process_reaped = false;
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for (int i = 0; i < 500; i++) {
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if (access(proc.c_str(), F_OK) == -1) {
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process_reaped = true;
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break;
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}
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usleep(10 * 1000); // 10 ms
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}
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EXPECT_TRUE(process_reaped);
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}
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TEST(ForkserverTest, ForkExecveWorks) {
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// Run a test binary through the FORK_EXECVE request.
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int exec_fd = GetMinimalTestcaseFd();
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PCHECK(exec_fd != -1) << "Could not open test binary";
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ASSERT_NE(TestSingleRequest(FORKSERVER_FORK_EXECVE, exec_fd, -1), -1);
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}
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TEST(ForkserverTest, ForkExecveSandboxWithoutPolicy) {
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// Run a test binary through the FORKSERVER_FORK_EXECVE_SANDBOX request.
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int exec_fd = GetMinimalTestcaseFd();
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PCHECK(exec_fd != -1) << "Could not open test binary";
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}
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} // namespace sandbox2
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