diff options
Diffstat (limited to 'security/sandbox/linux/broker/SandboxBrokerPolicyFactory.cpp')
-rw-r--r-- | security/sandbox/linux/broker/SandboxBrokerPolicyFactory.cpp | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/security/sandbox/linux/broker/SandboxBrokerPolicyFactory.cpp b/security/sandbox/linux/broker/SandboxBrokerPolicyFactory.cpp deleted file mode 100644 index 8e698606e..000000000 --- a/security/sandbox/linux/broker/SandboxBrokerPolicyFactory.cpp +++ /dev/null @@ -1,194 +0,0 @@ -/* -*- 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 http://mozilla.org/MPL/2.0/. */ - -#include "SandboxBrokerPolicyFactory.h" -#include "SandboxInfo.h" - -#include "mozilla/ClearOnShutdown.h" -#include "mozilla/Preferences.h" -#include "nsPrintfCString.h" -#include "nsString.h" -#include "nsThreadUtils.h" -#include "nsXULAppAPI.h" -#include "SpecialSystemDirectory.h" - -#ifdef ANDROID -#include "cutils/properties.h" -#endif - -namespace mozilla { - -/* static */ bool -SandboxBrokerPolicyFactory::IsSystemSupported() { -#ifdef ANDROID - char hardware[PROPERTY_VALUE_MAX]; - int length = property_get("ro.hardware", hardware, nullptr); - // "goldfish" -> emulator. Other devices can be added when we're - // reasonably sure they work. Eventually this won't be needed.... - if (length > 0 && strcmp(hardware, "goldfish") == 0) { - return true; - } - - // When broker is running in permissive mode, we enable it - // automatically regardless of the device. - if (SandboxInfo::Get().Test(SandboxInfo::kPermissive)) { - return true; - } -#endif - return false; -} - -#if defined(MOZ_CONTENT_SANDBOX) -namespace { -static const int rdonly = SandboxBroker::MAY_READ; -static const int wronly = SandboxBroker::MAY_WRITE; -static const int rdwr = rdonly | wronly; -static const int rdwrcr = rdwr | SandboxBroker::MAY_CREATE; -#if defined(MOZ_WIDGET_GONK) -static const int wrlog = wronly | SandboxBroker::MAY_CREATE; -#endif -} -#endif - -SandboxBrokerPolicyFactory::SandboxBrokerPolicyFactory() -{ - // Policy entries that are the same in every process go here, and - // are cached over the lifetime of the factory. -#if defined(MOZ_CONTENT_SANDBOX) && defined(MOZ_WIDGET_GONK) - SandboxBroker::Policy* policy = new SandboxBroker::Policy; - - // Devices that need write access: - policy->AddPath(rdwr, "/dev/genlock"); // bug 980924 - policy->AddPath(rdwr, "/dev/ashmem"); // bug 980947 - policy->AddTree(wronly, "/dev/log"); // bug 1199857 - // Graphics devices are a significant source of attack surface, but - // there's not much we can do about it without proxying (which is - // very difficult and a perforamnce hit). - policy->AddPrefix(rdwr, "/dev", "kgsl"); // bug 995072 - policy->AddPath(rdwr, "/dev/qemu_pipe"); // but 1198410: goldfish gralloc. - - // Bug 1198475: mochitest logs. (This is actually passed in via URL - // query param to the mochitest page, and is configurable, so this - // isn't enough in general, but hopefully it's good enough for B2G.) - // Conditional on tests being run, using the same check seen in - // DirectoryProvider.js to set ProfD. - if (access("/data/local/tests/profile", R_OK) == 0) { - policy->AddPath(wrlog, "/data/local/tests/log/mochitest.log"); - } - - // Read-only items below this line. - - policy->AddPath(rdonly, "/dev/urandom"); // bug 964500, bug 995069 - policy->AddPath(rdonly, "/dev/ion"); // bug 980937 - policy->AddPath(rdonly, "/proc/cpuinfo"); // bug 995067 - policy->AddPath(rdonly, "/proc/meminfo"); // bug 1025333 - policy->AddPath(rdonly, "/sys/devices/system/cpu/present"); // bug 1025329 - policy->AddPath(rdonly, "/sys/devices/system/soc/soc0/id"); // bug 1025339 - policy->AddPath(rdonly, "/etc/media_profiles.xml"); // bug 1198419 - policy->AddPath(rdonly, "/etc/media_codecs.xml"); // bug 1198460 - policy->AddTree(rdonly, "/system/fonts"); // bug 1026063 - - // Bug 1199051 (crossplatformly, this is NS_GRE_DIR). - policy->AddTree(rdonly, "/system/b2g"); - - // Bug 1026356: dynamic library loading from assorted frameworks we - // don't control (media codecs, maybe others). - // - // Bug 1198515: Also, the profiler calls breakpad code to get info - // on all loaded ELF objects, which opens those files. - policy->AddTree(rdonly, "/system/lib"); - policy->AddTree(rdonly, "/vendor/lib"); - policy->AddPath(rdonly, "/system/bin/linker"); // (profiler only) - - // Bug 1199866: EGL/WebGL. - policy->AddPath(rdonly, "/system/lib/egl"); - policy->AddPath(rdonly, "/vendor/lib/egl"); - - // Bug 1198401: timezones. Yes, we need both of these; see bug. - policy->AddTree(rdonly, "/system/usr/share/zoneinfo"); - policy->AddTree(rdonly, "/system//usr/share/zoneinfo"); - - policy->AddPath(rdonly, "/data/local/tmp/profiler.options", - SandboxBroker::Policy::AddAlways); // bug 1029337 - - mCommonContentPolicy.reset(policy); -#elif defined(MOZ_CONTENT_SANDBOX) - SandboxBroker::Policy* policy = new SandboxBroker::Policy; - policy->AddDir(rdonly, "/"); - policy->AddDir(rdwrcr, "/dev/shm"); - // Add write permissions on the temporary directory. This can come - // from various environment variables (TMPDIR,TMP,TEMP,...) so - // make sure to use the full logic. - nsCOMPtr<nsIFile> tmpDir; - nsresult rv = GetSpecialSystemDirectory(OS_TemporaryDirectory, - getter_AddRefs(tmpDir)); - if (NS_SUCCEEDED(rv)) { - nsAutoCString tmpPath; - rv = tmpDir->GetNativePath(tmpPath); - if (NS_SUCCEEDED(rv)) { - policy->AddDir(rdwrcr, tmpPath.get()); - } - } - // If the above fails at any point, fall back to a very good guess. - if (NS_FAILED(rv)) { - policy->AddDir(rdwrcr, "/tmp"); - } - - // Bug 1308851: NVIDIA proprietary driver when using WebGL - policy->AddPrefix(rdwr, "/dev", "nvidia"); - - // Bug 1312678: radeonsi/Intel with DRI when using WebGL - policy->AddDir(rdwr, "/dev/dri"); - - mCommonContentPolicy.reset(policy); -#endif -} - -#ifdef MOZ_CONTENT_SANDBOX -UniquePtr<SandboxBroker::Policy> -SandboxBrokerPolicyFactory::GetContentPolicy(int aPid) -{ - // Policy entries that vary per-process (currently the only reason - // that can happen is because they contain the pid) are added here. - - MOZ_ASSERT(NS_IsMainThread()); - // File broker usage is controlled through a pref. - if (Preferences::GetInt("security.sandbox.content.level") <= 1) { - return nullptr; - } - - MOZ_ASSERT(mCommonContentPolicy); -#if defined(MOZ_WIDGET_GONK) - // Allow overriding "unsupported"ness with a pref, for testing. - if (!IsSystemSupported()) { - return nullptr; - } - UniquePtr<SandboxBroker::Policy> - policy(new SandboxBroker::Policy(*mCommonContentPolicy)); - - // Bug 1029337: where the profiler writes the data. - nsPrintfCString profilerLogPath("/data/local/tmp/profile_%d_%d.txt", - GeckoProcessType_Content, aPid); - policy->AddPath(wrlog, profilerLogPath.get()); - - // Bug 1198550: the profiler's replacement for dl_iterate_phdr - policy->AddPath(rdonly, nsPrintfCString("/proc/%d/maps", aPid).get()); - - // Bug 1198552: memory reporting. - policy->AddPath(rdonly, nsPrintfCString("/proc/%d/statm", aPid).get()); - policy->AddPath(rdonly, nsPrintfCString("/proc/%d/smaps", aPid).get()); - - return policy; -#else - UniquePtr<SandboxBroker::Policy> - policy(new SandboxBroker::Policy(*mCommonContentPolicy)); - // Return the common policy. - return policy; -#endif -} - -#endif // MOZ_CONTENT_SANDBOX -} // namespace mozilla |