diff --git a/adb/Android.mk b/adb/Android.mk
index 112bc80..819bad1 100644
--- a/adb/Android.mk
+++ b/adb/Android.mk
@@ -17,11 +17,15 @@
     -Wvla \
     -DADB_REVISION='"$(adb_version)"' \
 
-ADB_COMMON_linux_CFLAGS := \
+ADB_COMMON_posix_CFLAGS := \
     -Wexit-time-destructors \
+    -Wthread-safety
+
+ADB_COMMON_linux_CFLAGS := \
+    $(ADB_COMMON_posix_CFLAGS) \
 
 ADB_COMMON_darwin_CFLAGS := \
-    -Wexit-time-destructors \
+    $(ADB_COMMON_posix_CFLAGS) \
 
 # Define windows.h and tchar.h Unicode preprocessor symbols so that
 # CreateFile(), _tfopen(), etc. map to versions that take wchar_t*, breaking the
diff --git a/adb/sysdeps_test.cpp b/adb/sysdeps_test.cpp
index edb0fb3..fd19882 100644
--- a/adb/sysdeps_test.cpp
+++ b/adb/sysdeps_test.cpp
@@ -201,55 +201,6 @@
     }
 }
 
-TEST(sysdeps_mutex, mutex_smoke) {
-    static std::atomic<bool> finished(false);
-    static std::mutex &m = *new std::mutex();
-    m.lock();
-    ASSERT_FALSE(m.try_lock());
-    std::thread thread([]() {
-        ASSERT_FALSE(m.try_lock());
-        m.lock();
-        finished.store(true);
-        std::this_thread::sleep_for(200ms);
-        m.unlock();
-    });
-
-    ASSERT_FALSE(finished.load());
-    std::this_thread::sleep_for(100ms);
-    ASSERT_FALSE(finished.load());
-    m.unlock();
-    std::this_thread::sleep_for(100ms);
-    m.lock();
-    ASSERT_TRUE(finished.load());
-    m.unlock();
-
-    thread.join();
-}
-
-TEST(sysdeps_mutex, recursive_mutex_smoke) {
-    static std::recursive_mutex &m = *new std::recursive_mutex();
-
-    m.lock();
-    ASSERT_TRUE(m.try_lock());
-    m.unlock();
-
-    std::thread thread([]() {
-        ASSERT_FALSE(m.try_lock());
-        m.lock();
-        std::this_thread::sleep_for(500ms);
-        m.unlock();
-    });
-
-    std::this_thread::sleep_for(100ms);
-    m.unlock();
-    std::this_thread::sleep_for(100ms);
-    ASSERT_FALSE(m.try_lock());
-    m.lock();
-    m.unlock();
-
-    thread.join();
-}
-
 TEST(sysdeps_condition_variable, smoke) {
     static std::mutex &m = *new std::mutex;
     static std::condition_variable &cond = *new std::condition_variable;
diff --git a/init/builtins.cpp b/init/builtins.cpp
index 559fb84..3dadfd7 100644
--- a/init/builtins.cpp
+++ b/init/builtins.cpp
@@ -835,7 +835,9 @@
 }
 
 static int do_init_user0(const std::vector<std::string>& args) {
-    return e4crypt_do_init_user0();
+    std::vector<std::string> exec_args = {"exec", "/system/bin/vdc", "--wait", "cryptfs",
+                                          "init_user0"};
+    return do_exec(exec_args);
 }
 
 const BuiltinFunctionMap::Map& BuiltinFunctionMap::map() const {
diff --git a/init/init.cpp b/init/init.cpp
index 99ce5e6..8758653 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -21,6 +21,7 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
+#include <keyutils.h>
 #include <libgen.h>
 #include <paths.h>
 #include <signal.h>
@@ -1015,6 +1016,11 @@
     InitKernelLogging(argv);
     LOG(INFO) << "init second stage started!";
 
+    // Set up a session keyring that all processes will have access to. It
+    // will hold things like FBE encryption keys. No process should override
+    // its session keyring.
+    keyctl(KEYCTL_GET_KEYRING_ID, KEY_SPEC_SESSION_KEYRING, 1);
+
     // Indicate that booting is in progress to background fw loaders, etc.
     close(open("/dev/.booting", O_WRONLY | O_CREAT | O_CLOEXEC, 0000));
 
diff --git a/init/keyutils.h b/init/keyutils.h
new file mode 100644
index 0000000..de01beb
--- /dev/null
+++ b/init/keyutils.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* Miniature version of a header-only keyutils.h (no library required) */
+
+#ifndef _INIT_KEYUTILS_H_
+#define _INIT_KEYUTILS_H_
+
+#ifndef KEYUTILS_H /* walk away if the _real_ one exists */
+
+#include <linux/keyctl.h>
+#include <stdarg.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+static inline long keyctl(int cmd, ...) {
+    va_list va;
+    unsigned long arg2, arg3, arg4, arg5;
+
+    va_start(va, cmd);
+    arg2 = va_arg(va, unsigned long);
+    arg3 = va_arg(va, unsigned long);
+    arg4 = va_arg(va, unsigned long);
+    arg5 = va_arg(va, unsigned long);
+    va_end(va);
+    return syscall(__NR_keyctl, cmd, arg2, arg3, arg4, arg5);
+}
+
+#endif
+
+#endif
diff --git a/logd/logd.rc b/logd/logd.rc
index ee89b83..7494d8f 100644
--- a/logd/logd.rc
+++ b/logd/logd.rc
@@ -5,7 +5,7 @@
     file /proc/kmsg r
     file /dev/kmsg w
     user logd
-    group logd system readproc
+    group logd system package_info readproc
     writepid /dev/cpuset/system-background/tasks
 
 service logd-reinit /system/bin/logd --reinit
diff --git a/logd/main.cpp b/logd/main.cpp
index 18029eb..c8183f0 100644
--- a/logd/main.cpp
+++ b/logd/main.cpp
@@ -240,23 +240,36 @@
     set_sched_policy(0, SP_BACKGROUND);
     setpriority(PRIO_PROCESS, 0, ANDROID_PRIORITY_BACKGROUND);
 
+    // We should drop to AID_LOGD, if we are anything else, we have
+    // even lesser privileges and accept our fate.
+    gid_t groups[] = {
+        AID_SYSTEM,        // search access to /data/system path
+        AID_PACKAGE_INFO,  // readonly access to /data/system/packages.list
+    };
+    if (setgroups(arraysize(groups), groups) == -1) {
+        android::prdebug(
+            "logd.daemon: failed to set AID_SYSTEM AID_PACKAGE_INFO groups");
+    }
+    if (setgid(AID_LOGD) != 0) {
+        android::prdebug("logd.daemon: failed to set AID_LOGD gid");
+    }
+    if (setuid(AID_LOGD) != 0) {
+        android::prdebug("logd.daemon: failed to set AID_LOGD uid");
+    }
+
     cap_t caps = cap_init();
     (void)cap_clear(caps);
     (void)cap_set_proc(caps);
     (void)cap_free(caps);
 
-    // If we are AID_ROOT, we should drop to AID_LOGD+AID_SYSTEM, if we are
-    // anything else, we have even lesser privileges and accept our fate. Not
-    // worth checking for error returns setting this thread's privileges.
-    (void)setgid(AID_SYSTEM);  // readonly access to /data/system/packages.list
-    (void)setuid(AID_LOGD);    // access to everything logd, eg /data/misc/logd
-
     while (reinit_running && !sem_wait(&reinit) && reinit_running) {
         // uidToName Privileged Worker
         if (uid) {
             name = nullptr;
 
-            packagelist_parse(package_list_parser_cb, nullptr);
+            // if we got the perms wrong above, this would spam if we reported
+            // problems with acquisition of an uid name from the packages.
+            (void)packagelist_parse(package_list_parser_cb, nullptr);
 
             uid = 0;
             sem_post(&uidName);
diff --git a/logd/tests/logd_test.cpp b/logd/tests/logd_test.cpp
index bd9fa93..f90c9fb 100644
--- a/logd/tests/logd_test.cpp
+++ b/logd/tests/logd_test.cpp
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+#include <ctype.h>
 #include <fcntl.h>
 #include <inttypes.h>
 #include <poll.h>
@@ -26,6 +27,7 @@
 
 #include <string>
 
+#include <android-base/file.h>
 #include <android-base/macros.h>
 #include <android-base/stringprintf.h>
 #include <cutils/sockets.h>
@@ -85,7 +87,7 @@
         size_t ret = atol(buf) + 1;
         if (ret < 4) {
             delete[] buf;
-            buf = NULL;
+            buf = nullptr;
             break;
         }
         bool check = ret <= len;
@@ -107,7 +109,7 @@
     // UID   PACKAGE                                                BYTES LINES
     // 0     root                                                  54164 147569
     //
-    char* benchmark = NULL;
+    char* benchmark = nullptr;
     do {
         static const char signature[] = "\n0     root ";
 
@@ -122,7 +124,7 @@
         benchmark = cp;
 #ifdef DEBUG
         char* end = strstr(benchmark, "\n");
-        if (end == NULL) {
+        if (end == nullptr) {
             end = benchmark + strlen(benchmark);
         }
         fprintf(stderr, "parse for spam counter in \"%.*s\"\n",
@@ -154,7 +156,7 @@
         if (value > 10UL) {
             break;
         }
-        benchmark = NULL;
+        benchmark = nullptr;
     } while (*cp);
     return benchmark;
 }
@@ -165,9 +167,14 @@
     size_t len;
     char* buf;
 
+    // Drop cache so that any access problems can be discovered.
+    if (!android::base::WriteStringToFile("3\n", "/proc/sys/vm/drop_caches")) {
+        GTEST_LOG_(INFO) << "Could not open trigger dropping inode cache";
+    }
+
     alloc_statistics(&buf, &len);
 
-    ASSERT_TRUE(NULL != buf);
+    ASSERT_TRUE(nullptr != buf);
 
     // remove trailing FF
     char* cp = buf + len - 1;
@@ -192,19 +199,38 @@
     EXPECT_EQ(0, truncated);
 
     char* main_logs = strstr(cp, "\nChattiest UIDs in main ");
-    EXPECT_TRUE(NULL != main_logs);
+    EXPECT_TRUE(nullptr != main_logs);
 
     char* radio_logs = strstr(cp, "\nChattiest UIDs in radio ");
     if (!radio_logs)
-        GTEST_LOG_(INFO) << "Value of: NULL != radio_logs\n"
+        GTEST_LOG_(INFO) << "Value of: nullptr != radio_logs\n"
                             "Actual: false\n"
                             "Expected: false\n";
 
     char* system_logs = strstr(cp, "\nChattiest UIDs in system ");
-    EXPECT_TRUE(NULL != system_logs);
+    EXPECT_TRUE(nullptr != system_logs);
 
     char* events_logs = strstr(cp, "\nChattiest UIDs in events ");
-    EXPECT_TRUE(NULL != events_logs);
+    EXPECT_TRUE(nullptr != events_logs);
+
+    // Check if there is any " u0_a#### " as this means packagelistparser broken
+    char* used_getpwuid = nullptr;
+    int used_getpwuid_len;
+    char* uid_name = cp;
+    static const char getpwuid_prefix[] = " u0_a";
+    while ((uid_name = strstr(uid_name, getpwuid_prefix)) != nullptr) {
+        used_getpwuid = uid_name + 1;
+        uid_name += strlen(getpwuid_prefix);
+        while (isdigit(*uid_name)) ++uid_name;
+        used_getpwuid_len = uid_name - used_getpwuid;
+        if (isspace(*uid_name)) break;
+        used_getpwuid = nullptr;
+    }
+    EXPECT_TRUE(nullptr == used_getpwuid);
+    if (used_getpwuid) {
+        fprintf(stderr, "libpackagelistparser failed to pick up %.*s\n",
+                used_getpwuid_len, used_getpwuid);
+    }
 
     delete[] buf;
 #else
@@ -352,7 +378,7 @@
         }
 
         alarm(old_alarm);
-        sigaction(SIGALRM, &old_sigaction, NULL);
+        sigaction(SIGALRM, &old_sigaction, nullptr);
 
         close(fd);
     }
@@ -434,7 +460,7 @@
 
     // Introduce some extreme spam for the worst UID filter
     ASSERT_TRUE(
-        NULL !=
+        nullptr !=
         (fp = popen("/data/nativetest/liblog-benchmarks/liblog-benchmarks"
                     " BM_log_maximum_retry"
                     " BM_log_maximum"
@@ -505,10 +531,10 @@
     bool collected_statistics = !!buf;
     EXPECT_EQ(true, collected_statistics);
 
-    ASSERT_TRUE(NULL != buf);
+    ASSERT_TRUE(nullptr != buf);
 
     char* benchmark_statistics_found = find_benchmark_spam(buf);
-    ASSERT_TRUE(benchmark_statistics_found != NULL);
+    ASSERT_TRUE(benchmark_statistics_found != nullptr);
 
     // Check how effective the SPAM filter is, parse out Now size.
     // 0     root                      54164 147569
@@ -603,7 +629,7 @@
         written = write(fd, ask.c_str(), len) == (ssize_t)len;
         if (!written) {
             alarm(old_alarm);
-            sigaction(SIGALRM, &old_sigaction, NULL);
+            sigaction(SIGALRM, &old_sigaction, nullptr);
             close(fd);
             continue;
         }
@@ -625,7 +651,7 @@
                                    : (old_alarm > (1 + 3 - alarm_wrap))
                                          ? old_alarm - 3 + alarm_wrap
                                          : 2);
-        sigaction(SIGALRM, &old_sigaction, NULL);
+        sigaction(SIGALRM, &old_sigaction, nullptr);
 
         close(fd);
 
@@ -648,7 +674,7 @@
     EXPECT_TRUE(content_timeout);
     EXPECT_NE(0U, alarm_timeout);
 #else
-    command = NULL;
+    command = nullptr;
     GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
 }
@@ -713,7 +739,7 @@
         written = write(fd, ask.c_str(), len) == (ssize_t)len;
         if (!written) {
             alarm(old_alarm);
-            sigaction(SIGALRM, &old_sigaction, NULL);
+            sigaction(SIGALRM, &old_sigaction, nullptr);
             close(fd);
             continue;
         }
@@ -735,7 +761,7 @@
                                    : (old_alarm > (1 + 3 - alarm_wrap))
                                          ? old_alarm - 3 + alarm_wrap
                                          : 2);
-        sigaction(SIGALRM, &old_sigaction, NULL);
+        sigaction(SIGALRM, &old_sigaction, nullptr);
 
         close(fd);
 
@@ -837,7 +863,7 @@
     int save_errno = (recv_ret < 0) ? errno : 0;
 
     EXPECT_NE(0U, alarm(old_alarm));
-    sigaction(SIGALRM, &old_sigaction, NULL);
+    sigaction(SIGALRM, &old_sigaction, nullptr);
 
     EXPECT_EQ(0, recv_ret);
     if (recv_ret > 0) {
@@ -876,8 +902,8 @@
     char* cp;
     long ret = strtol(buffer, &cp, 10);
     EXPECT_GT(ret, 16);
-    EXPECT_TRUE(strstr(buffer, "\t(to life the universe etc|3)") != NULL);
-    EXPECT_TRUE(strstr(buffer, "answer") != NULL);
+    EXPECT_TRUE(strstr(buffer, "\t(to life the universe etc|3)") != nullptr);
+    EXPECT_TRUE(strstr(buffer, "answer") != nullptr);
 #else
     GTEST_LOG_(INFO) << "This test does nothing.\n";
 #endif
@@ -897,8 +923,8 @@
     char* cp;
     long ret = strtol(buffer, &cp, 10);
     EXPECT_GT(ret, 16);
-    EXPECT_TRUE(strstr(buffer, "\t(new|1)") != NULL);
-    EXPECT_TRUE(strstr(buffer, name) != NULL);
+    EXPECT_TRUE(strstr(buffer, "\t(new|1)") != nullptr);
+    EXPECT_TRUE(strstr(buffer, name) != nullptr);
 // ToDo: also look for this in /data/misc/logd/event-log-tags and
 // /dev/event-log-tags.
 #else
@@ -942,7 +968,7 @@
     ASSERT_EQ(0, info.si_status);
 
     struct logger_list* logger_list;
-    ASSERT_TRUE(NULL !=
+    ASSERT_TRUE(nullptr !=
                 (logger_list = android_logger_list_open(
                      LOG_ID_EVENTS, ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK,
                      0, pid)));
diff --git a/rootdir/init.rc b/rootdir/init.rc
index 540e976..8cdc13f 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -419,7 +419,6 @@
     # For security reasons, /data/local/tmp should always be empty.
     # Do not place files or directories in /data/local/tmp
     mkdir /data/local/tmp 0771 shell shell
-    mkdir /data/data 0771 system system
     mkdir /data/app-private 0771 system system
     mkdir /data/app-ephemeral 0771 system system
     mkdir /data/app-asec 0700 root root
@@ -472,7 +471,8 @@
 
     mkdir /data/user 0711 system system
     mkdir /data/user_de 0711 system system
-    symlink /data/data /data/user/0
+    mkdir /data/user/0 0711 system system
+    symlink /data/user/0 /data/data
 
     mkdir /data/media 0770 media_rw media_rw
     mkdir /data/media/obb 0770 media_rw media_rw