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-rw-r--r--security/sandbox/common/test/SandboxTestingChildTests.h876
1 files changed, 876 insertions, 0 deletions
diff --git a/security/sandbox/common/test/SandboxTestingChildTests.h b/security/sandbox/common/test/SandboxTestingChildTests.h
new file mode 100644
index 0000000000..3dd748daba
--- /dev/null
+++ b/security/sandbox/common/test/SandboxTestingChildTests.h
@@ -0,0 +1,876 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+#include "SandboxTestingChild.h"
+
+#include "mozilla/StaticPrefs_security.h"
+#include "mozilla/ipc/UtilityProcessSandboxing.h"
+#ifdef XP_MACOSX
+# include "nsCocoaFeatures.h"
+#endif
+#include "nsXULAppAPI.h"
+
+#ifdef XP_UNIX
+# include <fcntl.h>
+# include <netdb.h>
+# ifdef XP_LINUX
+# include <linux/mempolicy.h>
+# include <sched.h>
+# include <sys/ioctl.h>
+# include <sys/prctl.h>
+# include <sys/resource.h>
+# include <sys/socket.h>
+# include <sys/statfs.h>
+# include <sys/syscall.h>
+# include <sys/sysmacros.h>
+# include <sys/time.h>
+# include <sys/un.h>
+# include <sys/utsname.h>
+# include <termios.h>
+# include "mozilla/ProcInfo_linux.h"
+# include "mozilla/UniquePtrExtensions.h"
+# ifdef MOZ_X11
+# include "X11/Xlib.h"
+# include "X11UndefineNone.h"
+# endif // MOZ_X11
+# endif // XP_LINUX
+# include <sys/socket.h>
+# include <sys/stat.h>
+# include <sys/types.h>
+# include <time.h>
+# include <unistd.h>
+#endif
+
+#ifdef XP_MACOSX
+# if defined(__SSE2__) || defined(_M_X64) || \
+ (defined(_M_IX86_FP) && _M_IX86_FP >= 2)
+# include "emmintrin.h"
+# endif
+# include <spawn.h>
+# include <CoreFoundation/CoreFoundation.h>
+# include <CoreGraphics/CoreGraphics.h>
+# include <AudioToolbox/AudioToolbox.h>
+namespace ApplicationServices {
+# include <ApplicationServices/ApplicationServices.h>
+}
+#endif
+
+#ifdef XP_WIN
+# include <stdio.h>
+# include <winternl.h>
+
+# include "mozilla/DynamicallyLinkedFunctionPtr.h"
+# include "nsAppDirectoryServiceDefs.h"
+# include "mozilla/WindowsProcessMitigations.h"
+#endif
+
+#ifdef XP_LINUX
+// Defined in <linux/watch_queue.h> which was added in 5.8
+# ifndef O_NOTIFICATION_PIPE
+# define O_NOTIFICATION_PIPE O_EXCL
+# endif
+#endif
+
+constexpr bool kIsDebug =
+#ifdef DEBUG
+ true;
+#else
+ false;
+#endif
+
+namespace mozilla {
+
+#ifdef XP_LINUX
+static void RunTestsSched(SandboxTestingChild* child) {
+ struct sched_param param_pid_0 = {};
+ child->ErrnoTest("sched_getparam(0)"_ns, true,
+ [&] { return sched_getparam(0, &param_pid_0); });
+
+ struct sched_param param_pid_tid = {};
+ child->ErrnoTest("sched_getparam(tid)"_ns, true, [&] {
+ return sched_getparam((pid_t)syscall(__NR_gettid), &param_pid_tid);
+ });
+
+ struct sched_param param_pid_Ntid = {};
+ child->ErrnoValueTest("sched_getparam(Ntid)"_ns, EPERM, [&] {
+ return sched_getparam((pid_t)(syscall(__NR_gettid) - 1), &param_pid_Ntid);
+ });
+}
+#endif
+
+// Tests that apply to every process type (more or less)
+static void RunGenericTests(SandboxTestingChild* child, bool aIsGMP = false) {
+#ifdef XP_LINUX
+ // Check ABI issues with 32-bit arguments on 64-bit platforms.
+ if (sizeof(void*) == 8) {
+ static constexpr uint64_t kHighBits = 0xDEADBEEF00000000;
+
+ struct timespec ts0, ts1;
+ child->ErrnoTest("high_bits_gettime"_ns, true, [&] {
+ return syscall(__NR_clock_gettime, kHighBits | CLOCK_MONOTONIC, &ts0);
+ });
+ // Try to make sure we got the correct clock by reading it again and
+ // comparing to see if the times are vaguely similar.
+ int rv = clock_gettime(CLOCK_MONOTONIC, &ts1);
+ MOZ_RELEASE_ASSERT(rv == 0);
+ MOZ_RELEASE_ASSERT(ts0.tv_sec <= ts1.tv_sec + 1);
+ MOZ_RELEASE_ASSERT(ts1.tv_sec <= ts0.tv_sec + 60);
+
+ // Check some non-zeroth arguments. (fcntl is convenient for
+ // this, but GMP has a stricter policy, so skip it there.)
+ if (!aIsGMP) {
+ int flags;
+ child->ErrnoTest("high_bits_fcntl_getfl"_ns, true, [&] {
+ flags = syscall(__NR_fcntl, 0, kHighBits | F_GETFL);
+ return flags;
+ });
+ MOZ_RELEASE_ASSERT(flags == fcntl(0, F_GETFL));
+
+ int fds[2];
+ rv = pipe(fds);
+ MOZ_RELEASE_ASSERT(rv >= 0);
+ child->ErrnoTest("high_bits_fcntl_setfl"_ns, true, [&] {
+ return syscall(__NR_fcntl, fds[0], kHighBits | F_SETFL,
+ kHighBits | O_NONBLOCK);
+ });
+ flags = fcntl(fds[0], F_GETFL);
+ MOZ_RELEASE_ASSERT(flags >= 0);
+ MOZ_RELEASE_ASSERT(flags & O_NONBLOCK);
+ }
+ }
+#endif // XP_LINUX
+}
+
+#ifdef XP_WIN
+/**
+ * Uses NtCreateFile directly to test file system brokering.
+ *
+ */
+static void FileTest(const nsCString& aName, const char* aSpecialDirName,
+ const nsString& aRelativeFilePath, ACCESS_MASK aAccess,
+ bool aExpectSuccess, SandboxTestingChild* aChild) {
+ static const StaticDynamicallyLinkedFunctionPtr<decltype(&NtCreateFile)>
+ pNtCreateFile(L"ntdll.dll", "NtCreateFile");
+ static const StaticDynamicallyLinkedFunctionPtr<decltype(&NtClose)> pNtClose(
+ L"ntdll.dll", "NtClose");
+
+ // Start the filename with the NT namespace
+ nsString testFilename(u"\\??\\"_ns);
+ nsString dirPath;
+ aChild->SendGetSpecialDirectory(nsDependentCString(aSpecialDirName),
+ &dirPath);
+ testFilename.Append(dirPath);
+ testFilename.AppendLiteral("\\");
+ testFilename.Append(aRelativeFilePath);
+
+ UNICODE_STRING uniFileName;
+ ::RtlInitUnicodeString(&uniFileName, testFilename.get());
+
+ OBJECT_ATTRIBUTES objectAttributes;
+ InitializeObjectAttributes(&objectAttributes, &uniFileName,
+ OBJ_CASE_INSENSITIVE, nullptr, nullptr);
+
+ HANDLE fileHandle = INVALID_HANDLE_VALUE;
+ IO_STATUS_BLOCK ioStatusBlock = {};
+
+ ULONG createOptions = StringEndsWith(testFilename, u"\\"_ns) ||
+ StringEndsWith(testFilename, u"/"_ns)
+ ? FILE_DIRECTORY_FILE
+ : FILE_NON_DIRECTORY_FILE;
+ NTSTATUS status = pNtCreateFile(
+ &fileHandle, aAccess, &objectAttributes, &ioStatusBlock, nullptr, 0, 0,
+ FILE_OPEN_IF, createOptions | FILE_SYNCHRONOUS_IO_NONALERT, nullptr, 0);
+
+ if (fileHandle != INVALID_HANDLE_VALUE) {
+ pNtClose(fileHandle);
+ }
+
+ nsCString accessString;
+ if ((aAccess & FILE_GENERIC_READ) == FILE_GENERIC_READ) {
+ accessString.AppendLiteral("r");
+ }
+ if ((aAccess & FILE_GENERIC_WRITE) == FILE_GENERIC_WRITE) {
+ accessString.AppendLiteral("w");
+ }
+ if ((aAccess & FILE_GENERIC_EXECUTE) == FILE_GENERIC_EXECUTE) {
+ accessString.AppendLiteral("e");
+ }
+
+ nsCString msgRelPath = NS_ConvertUTF16toUTF8(aRelativeFilePath);
+ for (size_t i = 0, j = 0; i < aRelativeFilePath.Length(); ++i, ++j) {
+ if (aRelativeFilePath[i] == u'\\') {
+ msgRelPath.Insert('\\', j++);
+ }
+ }
+
+ nsCString message;
+ message.AppendPrintf(
+ "Special dir: %s, file: %s, access: %s , returned status: %lx",
+ aSpecialDirName, msgRelPath.get(), accessString.get(), status);
+
+ aChild->SendReportTestResults(aName, aExpectSuccess == NT_SUCCESS(status),
+ message);
+}
+#endif
+
+#ifdef XP_MACOSX
+/*
+ * Test if this process can launch another process with posix_spawnp,
+ * exec, and LSOpenCFURLRef. All launches are expected to fail. In processes
+ * where the sandbox permits reading of file metadata (content processes at
+ * this time), we expect the posix_spawnp error to be EPERM. In processes
+ * without that permission, we expect ENOENT. Changing the sandbox policy
+ * may break this assumption, but the important aspect to test for is that the
+ * launch is not permitted.
+ */
+void RunMacTestLaunchProcess(SandboxTestingChild* child,
+ int aPosixSpawnExpectedError = ENOENT) {
+ // Test that posix_spawnp fails
+ char* argv[2];
+ argv[0] = const_cast<char*>("bash");
+ argv[1] = NULL;
+ int rv = posix_spawnp(NULL, "/bin/bash", NULL, NULL, argv, NULL);
+ nsPrintfCString posixSpawnMessage("posix_spawnp returned %d, expected %d", rv,
+ aPosixSpawnExpectedError);
+ child->SendReportTestResults("posix_spawnp test"_ns,
+ rv == aPosixSpawnExpectedError,
+ posixSpawnMessage);
+
+ // Test that exec fails
+ child->ErrnoTest("execv /bin/bash test"_ns, false, [&] {
+ char* argvp = NULL;
+ return execv("/bin/bash", &argvp);
+ });
+
+ // Test that launching an application using LSOpenCFURLRef fails
+ char* uri;
+ if (nsCocoaFeatures::OnCatalinaOrLater()) {
+ uri = const_cast<char*>("/System/Applications/Utilities/Console.app");
+ } else {
+ uri = const_cast<char*>("/Applications/Utilities/Console.app");
+ }
+ CFStringRef filePath = ::CFStringCreateWithCString(kCFAllocatorDefault, uri,
+ kCFStringEncodingUTF8);
+ CFURLRef urlRef = ::CFURLCreateWithFileSystemPath(
+ kCFAllocatorDefault, filePath, kCFURLPOSIXPathStyle, false);
+ if (!urlRef) {
+ child->SendReportTestResults("LSOpenCFURLRef"_ns, false,
+ "CFURLCreateWithFileSystemPath failed"_ns);
+ return;
+ }
+
+ OSStatus status = ApplicationServices::LSOpenCFURLRef(urlRef, NULL);
+ ::CFRelease(urlRef);
+ nsPrintfCString lsMessage(
+ "LSOpenCFURLRef returned %d, "
+ "expected kLSServerCommunicationErr (%d)",
+ status, ApplicationServices::kLSServerCommunicationErr);
+ child->SendReportTestResults(
+ "LSOpenCFURLRef"_ns,
+ status == ApplicationServices::kLSServerCommunicationErr, lsMessage);
+}
+
+/*
+ * Test if this process can connect to the macOS window server.
+ * When |aShouldHaveAccess| is true, the test passes if access is __permitted__.
+ * When |aShouldHaveAccess| is false, the test passes if access is __blocked__.
+ */
+void RunMacTestWindowServer(SandboxTestingChild* child,
+ bool aShouldHaveAccess = false) {
+ // CGSessionCopyCurrentDictionary() returns NULL when a
+ // connection to the window server is not available.
+ CFDictionaryRef windowServerDict = CGSessionCopyCurrentDictionary();
+ bool gotWindowServerDetails = (windowServerDict != nullptr);
+ bool testPassed = (gotWindowServerDetails == aShouldHaveAccess);
+ child->SendReportTestResults(
+ "CGSessionCopyCurrentDictionary"_ns, testPassed,
+ gotWindowServerDetails
+ ? "dictionary returned, access is permitted"_ns
+ : "no dictionary returned, access appears blocked"_ns);
+ if (windowServerDict != nullptr) {
+ CFRelease(windowServerDict);
+ }
+}
+
+/*
+ * Test if this process can get access to audio components on macOS.
+ * When |aShouldHaveAccess| is true, the test passes if access is __permitted__.
+ * When |aShouldHaveAccess| is false, the test passes if access is __blocked__.
+ */
+void RunMacTestAudioAPI(SandboxTestingChild* child,
+ bool aShouldHaveAccess = false) {
+ AudioStreamBasicDescription inputFormat;
+ inputFormat.mFormatID = kAudioFormatMPEG4AAC;
+ inputFormat.mSampleRate = 48000.0;
+ inputFormat.mChannelsPerFrame = 2;
+ inputFormat.mBitsPerChannel = 0;
+ inputFormat.mFormatFlags = 0;
+ inputFormat.mFramesPerPacket = 1024;
+ inputFormat.mBytesPerPacket = 0;
+
+ UInt32 inputFormatSize = sizeof(inputFormat);
+ OSStatus status = AudioFormatGetProperty(
+ kAudioFormatProperty_FormatInfo, 0, NULL, &inputFormatSize, &inputFormat);
+
+ bool gotAudioFormat = (status == 0);
+ bool testPassed = (gotAudioFormat == aShouldHaveAccess);
+ child->SendReportTestResults(
+ "AudioFormatGetProperty"_ns, testPassed,
+ gotAudioFormat ? "got audio format, access is permitted"_ns
+ : "no audio format, access appears blocked"_ns);
+}
+#endif /* XP_MACOSX */
+
+#ifdef XP_WIN
+void RunWinTestWin32k(SandboxTestingChild* child,
+ bool aShouldHaveAccess = true) {
+ bool isLockedDown = (IsWin32kLockedDown() == true);
+ bool testPassed = (isLockedDown == aShouldHaveAccess);
+ child->SendReportTestResults(
+ "Win32kLockdown"_ns, testPassed,
+ isLockedDown ? "got lockdown, access is blocked"_ns
+ : "no lockdown, access appears permitted"_ns);
+}
+#endif // XP_WIN
+
+void RunTestsContent(SandboxTestingChild* child) {
+ MOZ_ASSERT(child, "No SandboxTestingChild*?");
+
+ RunGenericTests(child);
+
+#ifdef XP_UNIX
+ struct stat st;
+ static const char kAllowedPath[] = "/usr/lib";
+
+ child->ErrnoTest("fstatat_as_stat"_ns, true,
+ [&] { return fstatat(AT_FDCWD, kAllowedPath, &st, 0); });
+ child->ErrnoTest("fstatat_as_lstat"_ns, true, [&] {
+ return fstatat(AT_FDCWD, kAllowedPath, &st, AT_SYMLINK_NOFOLLOW);
+ });
+
+# ifdef XP_LINUX
+ child->ErrnoTest("fstatat_as_fstat"_ns, true,
+ [&] { return fstatat(0, "", &st, AT_EMPTY_PATH); });
+
+ const struct timespec usec = {0, 1000};
+ child->ErrnoTest("nanosleep"_ns, true,
+ [&] { return nanosleep(&usec, nullptr); });
+
+ struct timespec res = {0, 0};
+ child->ErrnoTest("clock_getres"_ns, true,
+ [&] { return clock_getres(CLOCK_REALTIME, &res); });
+
+ // same process is allowed
+ struct timespec tproc = {0, 0};
+ clockid_t same_process = MAKE_PROCESS_CPUCLOCK(getpid(), CPUCLOCK_SCHED);
+ child->ErrnoTest("clock_gettime_same_process"_ns, true,
+ [&] { return clock_gettime(same_process, &tproc); });
+
+ // different process is blocked by sandbox (SIGSYS, kernel would return
+ // EINVAL)
+ struct timespec tprocd = {0, 0};
+ clockid_t diff_process = MAKE_PROCESS_CPUCLOCK(1, CPUCLOCK_SCHED);
+ child->ErrnoValueTest("clock_gettime_diff_process"_ns, ENOSYS,
+ [&] { return clock_gettime(diff_process, &tprocd); });
+
+ // thread is allowed
+ struct timespec tthread = {0, 0};
+ clockid_t thread =
+ MAKE_THREAD_CPUCLOCK((pid_t)syscall(__NR_gettid), CPUCLOCK_SCHED);
+ child->ErrnoTest("clock_gettime_thread"_ns, true,
+ [&] { return clock_gettime(thread, &tthread); });
+
+ // getcpu is allowed
+ // We're using syscall directly because:
+ // - sched_getcpu uses vdso and as a result doesn't go through the sandbox.
+ // - getcpu isn't defined in the header files we're using yet.
+ int c;
+ child->ErrnoTest("getcpu"_ns, true,
+ [&] { return syscall(SYS_getcpu, &c, NULL, NULL); });
+
+ // An abstract socket that does not starts with '/', so we don't want it to
+ // work.
+ // Checking ENETUNREACH should be thrown by SandboxBrokerClient::Connect()
+ // when it detects it does not starts with a '/'
+ child->ErrnoValueTest("connect_abstract_blocked"_ns, ENETUNREACH, [&] {
+ int sockfd;
+ struct sockaddr_un addr;
+ char str[] = "\0xyz"; // Abstract socket requires first byte to be NULL
+ size_t str_size = 4;
+
+ memset(&addr, 0, sizeof(struct sockaddr_un));
+ addr.sun_family = AF_UNIX;
+ memcpy(&addr.sun_path, str, str_size);
+
+ sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (sockfd == -1) {
+ return -1;
+ }
+
+ int con_st = connect(sockfd, (struct sockaddr*)&addr,
+ sizeof(sa_family_t) + str_size);
+ return con_st;
+ });
+
+ // An abstract socket that does starts with /, so we do want it to work.
+ // Checking ECONNREFUSED because this is what the broker should get
+ // when trying to establish the connect call for us if it's allowed;
+ // otherwise we get EACCES, meaning that it was passed to the broker
+ // (unlike the previous test) but rejected.
+ const int errorForX =
+ StaticPrefs::security_sandbox_content_headless_AtStartup() ? EACCES
+ : ECONNREFUSED;
+ child->ErrnoValueTest("connect_abstract_permit"_ns, errorForX, [&] {
+ int sockfd;
+ struct sockaddr_un addr;
+ // we re-use actual X path, because this is what is allowed within
+ // SandboxBrokerPolicyFactory::InitContentPolicy()
+ // We can't just use any random path allowed, but one with CONNECT allowed.
+
+ // (Note that the real X11 sockets have names like `X0` for
+ // display `:0`; there shouldn't be anything named just `X`.)
+
+ // Abstract socket requires first byte to be NULL
+ char str[] = "\0/tmp/.X11-unix/X";
+ size_t str_size = 17;
+
+ memset(&addr, 0, sizeof(struct sockaddr_un));
+ addr.sun_family = AF_UNIX;
+ memcpy(&addr.sun_path, str, str_size);
+
+ sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (sockfd == -1) {
+ return -1;
+ }
+
+ int con_st = connect(sockfd, (struct sockaddr*)&addr,
+ sizeof(sa_family_t) + str_size);
+ return con_st;
+ });
+
+ // Testing FIPS-relevant files, which need to be accessible
+ std::vector<std::pair<const char*, bool>> open_tests = {
+ {"/dev/random", true}};
+ // Not all systems have that file, so we only test access, if it exists
+ // in the first place
+ if (stat("/proc/sys/crypto/fips_enabled", &st) == 0) {
+ open_tests.push_back({"/proc/sys/crypto/fips_enabled", true});
+ }
+
+ for (const std::pair<const char*, bool>& to_open : open_tests) {
+ child->ErrnoTest("open("_ns + nsCString(to_open.first) + ")"_ns,
+ to_open.second, [&] {
+ int fd = open(to_open.first, O_RDONLY);
+ if (to_open.second && fd > 0) {
+ close(fd);
+ }
+ return fd;
+ });
+ }
+
+ child->ErrnoTest("statfs"_ns, true, [] {
+ struct statfs sf;
+ return statfs("/usr/share", &sf);
+ });
+
+ child->ErrnoTest("pipe2"_ns, true, [] {
+ int fds[2];
+ int rv = pipe2(fds, O_CLOEXEC);
+ int savedErrno = errno;
+ if (rv == 0) {
+ close(fds[0]);
+ close(fds[1]);
+ }
+ errno = savedErrno;
+ return rv;
+ });
+
+ child->ErrnoValueTest("chroot"_ns, ENOSYS, [] { return chroot("/"); });
+
+ child->ErrnoValueTest("pipe2_notif"_ns, ENOSYS, [] {
+ int fds[2];
+ return pipe2(fds, O_NOTIFICATION_PIPE);
+ });
+
+# ifdef MOZ_X11
+ // Check that X11 access is blocked (bug 1129492).
+ // This will fail if security.sandbox.content.headless is turned off.
+ if (PR_GetEnv("DISPLAY")) {
+ Display* disp = XOpenDisplay(nullptr);
+
+ child->SendReportTestResults(
+ "x11_access"_ns, !disp,
+ disp ? "XOpenDisplay succeeded"_ns : "XOpenDisplay failed"_ns);
+ if (disp) {
+ XCloseDisplay(disp);
+ }
+ }
+# endif // MOZ_X11
+
+ child->ErrnoTest("realpath localtime"_ns, true, [] {
+ char buf[PATH_MAX];
+ return realpath("/etc/localtime", buf) ? 0 : -1;
+ });
+
+# endif // XP_LINUX
+
+# ifdef XP_MACOSX
+ RunMacTestLaunchProcess(child, EPERM);
+ RunMacTestWindowServer(child);
+ RunMacTestAudioAPI(child, true);
+# endif
+
+#elif XP_WIN
+ FileTest("read from chrome"_ns, NS_APP_USER_CHROME_DIR, u"sandboxTest.txt"_ns,
+ FILE_GENERIC_READ, true, child);
+ FileTest("read from profile via relative path"_ns, NS_APP_USER_CHROME_DIR,
+ u"..\\sandboxTest.txt"_ns, FILE_GENERIC_READ, false, child);
+ // The profile dir is the parent of the chrome dir.
+ FileTest("read from chrome using forward slash"_ns,
+ NS_APP_USER_PROFILE_50_DIR, u"chrome/sandboxTest.txt"_ns,
+ FILE_GENERIC_READ, false, child);
+
+ // Note: these only pass in DEBUG builds because we allow write access to the
+ // temp dir for certain test logs and that is where the profile is created.
+ FileTest("read from profile"_ns, NS_APP_USER_PROFILE_50_DIR,
+ u"sandboxTest.txt"_ns, FILE_GENERIC_READ, kIsDebug, child);
+ FileTest("read/write from chrome"_ns, NS_APP_USER_CHROME_DIR,
+ u"sandboxTest.txt"_ns, FILE_GENERIC_READ | FILE_GENERIC_WRITE,
+ kIsDebug, child);
+#else
+ child->ReportNoTests();
+#endif
+}
+
+void RunTestsSocket(SandboxTestingChild* child) {
+ MOZ_ASSERT(child, "No SandboxTestingChild*?");
+
+ RunGenericTests(child);
+
+#ifdef XP_UNIX
+ child->ErrnoTest("getaddrinfo"_ns, true, [&] {
+ struct addrinfo* res;
+ int rv = getaddrinfo("localhost", nullptr, nullptr, &res);
+ if (res != nullptr) {
+ freeaddrinfo(res);
+ }
+ return rv;
+ });
+
+# ifdef XP_LINUX
+ child->ErrnoTest("prctl_allowed"_ns, true, [&] {
+ int rv = prctl(PR_SET_DUMPABLE, 0, 0, 0, 0);
+ return rv;
+ });
+
+ child->ErrnoTest("prctl_blocked"_ns, false, [&] {
+ int rv = prctl(PR_GET_SECCOMP, 0, 0, 0, 0);
+ return rv;
+ });
+
+ // Testing FIPS-relevant files, which need to be accessible
+ std::vector<std::pair<const char*, bool>> open_tests = {
+ {"/dev/random", true}};
+ // Not all systems have that file, so we only test access, if it exists
+ // in the first place
+ struct stat st;
+ if (stat("/proc/sys/crypto/fips_enabled", &st) == 0) {
+ open_tests.push_back({"/proc/sys/crypto/fips_enabled", true});
+ }
+
+ for (const std::pair<const char*, bool>& to_open : open_tests) {
+ child->ErrnoTest("open("_ns + nsCString(to_open.first) + ")"_ns,
+ to_open.second, [&] {
+ int fd = open(to_open.first, O_RDONLY);
+ if (to_open.second && fd > 0) {
+ close(fd);
+ }
+ return fd;
+ });
+ }
+
+ // getcpu is allowed
+ // We're using syscall directly because:
+ // - sched_getcpu uses vdso and as a result doesn't go through the sandbox.
+ // - getcpu isn't defined in the header files we're using yet.
+ int c;
+ child->ErrnoTest("getcpu"_ns, true,
+ [&] { return syscall(SYS_getcpu, &c, NULL, NULL); });
+# endif // XP_LINUX
+#elif XP_MACOSX
+ RunMacTestLaunchProcess(child);
+ RunMacTestWindowServer(child);
+ RunMacTestAudioAPI(child);
+#else // XP_UNIX
+ child->ReportNoTests();
+#endif // XP_UNIX
+}
+
+void RunTestsRDD(SandboxTestingChild* child) {
+ MOZ_ASSERT(child, "No SandboxTestingChild*?");
+
+ RunGenericTests(child);
+
+#ifdef XP_UNIX
+# ifdef XP_LINUX
+ child->ErrnoValueTest("ioctl_tiocsti"_ns, ENOSYS, [&] {
+ int rv = ioctl(1, TIOCSTI, "x");
+ return rv;
+ });
+
+ struct rusage res = {};
+ child->ErrnoTest("getrusage"_ns, true, [&] {
+ int rv = getrusage(RUSAGE_SELF, &res);
+ return rv;
+ });
+
+ child->ErrnoValueTest("unlink"_ns, ENOENT, [&] {
+ int rv = unlink("");
+ return rv;
+ });
+
+ child->ErrnoValueTest("unlinkat"_ns, ENOENT, [&] {
+ int rv = unlinkat(AT_FDCWD, "", 0);
+ return rv;
+ });
+
+ RunTestsSched(child);
+
+ child->ErrnoTest("socket_inet"_ns, false,
+ [] { return socket(AF_INET, SOCK_STREAM, 0); });
+
+ child->ErrnoTest("socket_unix"_ns, false,
+ [] { return socket(AF_UNIX, SOCK_STREAM, 0); });
+
+ child->ErrnoTest("uname"_ns, true, [] {
+ struct utsname uts;
+ return uname(&uts);
+ });
+
+ child->ErrnoValueTest("ioctl_dma_buf"_ns, ENOTTY, [] {
+ // Apply the ioctl to the wrong kind of fd; it should fail with
+ // ENOTTY (rather than ENOSYS if it were blocked).
+ return ioctl(0, _IOW('b', 0, uint64_t), nullptr);
+ });
+
+ // getcpu is allowed
+ // We're using syscall directly because:
+ // - sched_getcpu uses vdso and as a result doesn't go through the sandbox.
+ // - getcpu isn't defined in the header files we're using yet.
+ int c;
+ child->ErrnoTest("getcpu"_ns, true,
+ [&] { return syscall(SYS_getcpu, &c, NULL, NULL); });
+
+ // The nvidia proprietary drivers will, in some cases, try to
+ // mknod their device files; we reject this politely.
+ child->ErrnoValueTest("mknod"_ns, EPERM, [] {
+ return mknod("/dev/null", S_IFCHR | 0666, makedev(1, 3));
+ });
+
+ // nvidia defines some ioctls with the type 0x46 ('F', otherwise
+ // used by fbdev) and numbers starting from 200 (0xc8).
+ child->ErrnoValueTest("ioctl_nvidia"_ns, ENOTTY,
+ [] { return ioctl(0, 0x46c8, nullptr); });
+
+ child->ErrnoTest("statfs"_ns, true, [] {
+ struct statfs sf;
+ return statfs("/usr/share", &sf);
+ });
+
+# elif XP_MACOSX
+ RunMacTestLaunchProcess(child);
+ RunMacTestWindowServer(child);
+ RunMacTestAudioAPI(child, true);
+# endif
+#else // XP_UNIX
+# ifdef XP_WIN
+ RunWinTestWin32k(child, false);
+# endif // XP_WIN
+ child->ReportNoTests();
+#endif
+}
+
+void RunTestsGMPlugin(SandboxTestingChild* child) {
+ MOZ_ASSERT(child, "No SandboxTestingChild*?");
+
+ RunGenericTests(child, /* aIsGMP = */ true);
+
+#ifdef XP_UNIX
+# ifdef XP_LINUX
+ struct utsname utsname_res = {};
+ child->ErrnoTest("uname_restricted"_ns, true, [&] {
+ int rv = uname(&utsname_res);
+
+ nsCString expectedSysname("Linux"_ns);
+ nsCString sysname(utsname_res.sysname);
+ nsCString expectedVersion("3"_ns);
+ nsCString version(utsname_res.version);
+ if ((sysname != expectedSysname) || (version != expectedVersion)) {
+ return -1;
+ }
+
+ return rv;
+ });
+
+ child->ErrnoTest("getuid"_ns, true, [&] { return getuid(); });
+ child->ErrnoTest("getgid"_ns, true, [&] { return getgid(); });
+ child->ErrnoTest("geteuid"_ns, true, [&] { return geteuid(); });
+ child->ErrnoTest("getegid"_ns, true, [&] { return getegid(); });
+
+ RunTestsSched(child);
+
+ std::vector<std::pair<const char*, bool>> open_tests = {
+ {"/etc/ld.so.cache", true},
+ {"/proc/cpuinfo", true},
+ {"/etc/hostname", false}};
+
+ for (const std::pair<const char*, bool>& to_open : open_tests) {
+ child->ErrnoTest("open("_ns + nsCString(to_open.first) + ")"_ns,
+ to_open.second, [&] {
+ int fd = open(to_open.first, O_RDONLY);
+ if (to_open.second && fd > 0) {
+ close(fd);
+ }
+ return fd;
+ });
+ }
+
+ child->ErrnoValueTest("readlink_exe"_ns, EINVAL, [] {
+ char pathBuf[PATH_MAX];
+ return readlink("/proc/self/exe", pathBuf, sizeof(pathBuf));
+ });
+
+ child->ErrnoTest("memfd_sizing"_ns, true, [] {
+ int fd = syscall(__NR_memfd_create, "sandbox-test", 0);
+ if (fd < 0) {
+ if (errno == ENOSYS) {
+ // Don't fail the test if the kernel is old.
+ return 0;
+ }
+ return -1;
+ }
+
+ int rv = ftruncate(fd, 4096);
+ int savedErrno = errno;
+ close(fd);
+ errno = savedErrno;
+ return rv;
+ });
+
+# elif XP_MACOSX // XP_LINUX
+ RunMacTestLaunchProcess(child);
+ /* The Mac GMP process requires access to the window server */
+ RunMacTestWindowServer(child, true /* aShouldHaveAccess */);
+ RunMacTestAudioAPI(child);
+# endif // XP_MACOSX
+#else // XP_UNIX
+ child->ReportNoTests();
+#endif
+}
+
+void RunTestsGenericUtility(SandboxTestingChild* child) {
+ MOZ_ASSERT(child, "No SandboxTestingChild*?");
+
+ RunGenericTests(child);
+
+#ifdef XP_UNIX
+# ifdef XP_LINUX
+ child->ErrnoValueTest("ioctl_tiocsti"_ns, ENOSYS, [&] {
+ int rv = ioctl(1, TIOCSTI, "x");
+ return rv;
+ });
+
+ struct rusage res;
+ child->ErrnoTest("getrusage"_ns, true, [&] {
+ int rv = getrusage(RUSAGE_SELF, &res);
+ return rv;
+ });
+# elif XP_MACOSX // XP_LINUX
+ RunMacTestLaunchProcess(child);
+ RunMacTestWindowServer(child);
+ RunMacTestAudioAPI(child);
+# endif // XP_MACOSX
+#elif XP_WIN // XP_UNIX
+ child->ErrnoValueTest("write_only"_ns, EACCES, [&] {
+ FILE* rv = fopen("test_sandbox.txt", "w");
+ if (rv != nullptr) {
+ fclose(rv);
+ return 0;
+ }
+ return -1;
+ });
+ RunWinTestWin32k(child);
+#else // XP_UNIX
+ child->ReportNoTests();
+#endif // XP_MACOSX
+}
+
+void RunTestsUtilityAudioDecoder(SandboxTestingChild* child,
+ ipc::SandboxingKind aSandbox) {
+ MOZ_ASSERT(child, "No SandboxTestingChild*?");
+
+ RunGenericTests(child);
+
+#ifdef XP_UNIX
+# ifdef XP_LINUX
+ // getrusage is allowed in Generic Utility and on AudioDecoder
+ struct rusage res;
+ child->ErrnoTest("getrusage"_ns, true, [&] {
+ int rv = getrusage(RUSAGE_SELF, &res);
+ return rv;
+ });
+
+ // get_mempolicy is not allowed in Generic Utility but is on AudioDecoder
+ child->ErrnoTest("get_mempolicy"_ns, true, [&] {
+ int numa_node;
+ int test_val = 0;
+ // <numaif.h> not installed by default, let's call directly the syscall
+ long rv = syscall(SYS_get_mempolicy, &numa_node, NULL, 0, (void*)&test_val,
+ MPOL_F_NODE | MPOL_F_ADDR);
+ return rv;
+ });
+ // set_mempolicy is not allowed in Generic Utility but is on AudioDecoder
+ child->ErrnoValueTest("set_mempolicy"_ns, ENOSYS, [&] {
+ // <numaif.h> not installed by default, let's call directly the syscall
+ long rv = syscall(SYS_set_mempolicy, 0, NULL, 0);
+ return rv;
+ });
+# elif XP_MACOSX // XP_LINUX
+ RunMacTestLaunchProcess(child);
+ RunMacTestWindowServer(child);
+ RunMacTestAudioAPI(
+ child,
+ aSandbox == ipc::SandboxingKind::UTILITY_AUDIO_DECODING_APPLE_MEDIA);
+# endif // XP_MACOSX
+#else // XP_UNIX
+# ifdef XP_WIN
+ RunWinTestWin32k(child);
+# endif // XP_WIN
+ child->ReportNoTests();
+#endif // XP_UNIX
+}
+
+void RunTestsGPU(SandboxTestingChild* child) {
+ MOZ_ASSERT(child, "No SandboxTestingChild*?");
+
+ RunGenericTests(child);
+
+#if defined(XP_WIN)
+
+ FileTest("R/W access to shader-cache dir"_ns, NS_APP_USER_PROFILE_50_DIR,
+ u"shader-cache\\"_ns, FILE_GENERIC_READ | FILE_GENERIC_WRITE, true,
+ child);
+
+ FileTest("R/W access to shader-cache files"_ns, NS_APP_USER_PROFILE_50_DIR,
+ u"shader-cache\\sandboxTest.txt"_ns,
+ FILE_GENERIC_READ | FILE_GENERIC_WRITE, true, child);
+
+#else // defined(XP_WIN)
+ child->ReportNoTests();
+#endif // defined(XP_WIN)
+}
+
+} // namespace mozilla