diff --git a/adb/client/usb_libusb.cpp b/adb/client/usb_libusb.cpp
index b2fdc07..e7f44c6 100644
--- a/adb/client/usb_libusb.cpp
+++ b/adb/client/usb_libusb.cpp
@@ -180,10 +180,6 @@
     if (port_count < 0) return "";
     return StringPrintf("/dev/bus/usb/%03u/%03u", libusb_get_bus_number(device), ports[0]);
 }
-
-static bool is_device_accessible(libusb_device* device) {
-    return access(get_device_dev_path(device).c_str(), R_OK | W_OK) == 0;
-}
 #endif
 
 static bool endpoint_is_output(uint8_t endpoint) {
@@ -377,9 +373,10 @@
     {
         std::unique_lock<std::mutex> lock(usb_handles_mutex);
         usb_handles[device_address] = std::move(result);
-    }
 
-    register_usb_transport(usb_handle_raw, device_serial.c_str(), device_address.c_str(), writable);
+        register_usb_transport(usb_handle_raw, device_serial.c_str(), device_address.c_str(),
+                               writable);
+    }
     LOG(INFO) << "registered new usb device '" << device_serial << "'";
 }
 
@@ -388,18 +385,12 @@
 static void device_connected(libusb_device* device) {
 #if defined(__linux__)
     // Android's host linux libusb uses netlink instead of udev for device hotplug notification,
-    // which means we can get hotplug notifications before udev has updated ownership/perms on
-    // the device. Since we're not going to be able to link against the system's libudev any
-    // time soon, hack around this by checking for accessibility in a loop.
+    // which means we can get hotplug notifications before udev has updated ownership/perms on the
+    // device. Since we're not going to be able to link against the system's libudev any time soon,
+    // hack around this by inserting a sleep.
     auto thread = std::thread([device]() {
         std::string device_path = get_device_dev_path(device);
-        auto start = std::chrono::steady_clock::now();
-        while (std::chrono::steady_clock::now() - start < 500ms) {
-            if (is_device_accessible(device)) {
-                break;
-            }
-            std::this_thread::sleep_for(10ms);
-        }
+        std::this_thread::sleep_for(1s);
 
         process_device(device);
         if (--connecting_devices == 0) {
diff --git a/debuggerd/tombstoned/tombstoned.cpp b/debuggerd/tombstoned/tombstoned.cpp
index 0a9f000..b4a2bde 100644
--- a/debuggerd/tombstoned/tombstoned.cpp
+++ b/debuggerd/tombstoned/tombstoned.cpp
@@ -23,7 +23,9 @@
 
 #include <array>
 #include <deque>
+#include <string>
 #include <unordered_map>
+#include <utility>
 
 #include <event2/event.h>
 #include <event2/listener.h>
@@ -75,23 +77,24 @@
     find_oldest_artifact();
   }
 
-  unique_fd get_output_fd() {
+  std::pair<unique_fd, std::string> get_output() {
     unique_fd result;
-    char buf[PATH_MAX];
-    snprintf(buf, sizeof(buf), "%s%02d", file_name_prefix_.c_str(), next_artifact_);
+    std::string file_name = StringPrintf("%s%02d", file_name_prefix_.c_str(), next_artifact_);
+
     // Unlink and create the file, instead of using O_TRUNC, to avoid two processes
     // interleaving their output in case we ever get into that situation.
-    if (unlinkat(dir_fd_, buf, 0) != 0 && errno != ENOENT) {
-      PLOG(FATAL) << "failed to unlink tombstone at " << dir_path_ << buf;
+    if (unlinkat(dir_fd_, file_name.c_str(), 0) != 0 && errno != ENOENT) {
+      PLOG(FATAL) << "failed to unlink tombstone at " << dir_path_ << "/" << file_name;
     }
 
-    result.reset(openat(dir_fd_, buf, O_CREAT | O_EXCL | O_WRONLY | O_APPEND | O_CLOEXEC, 0640));
+    result.reset(openat(dir_fd_, file_name.c_str(),
+                        O_CREAT | O_EXCL | O_WRONLY | O_APPEND | O_CLOEXEC, 0640));
     if (result == -1) {
-      PLOG(FATAL) << "failed to create tombstone at " << dir_path_ << buf;
+      PLOG(FATAL) << "failed to create tombstone at " << dir_path_ << "/" << file_name;
     }
 
     next_artifact_ = (next_artifact_ + 1) % max_artifacts_;
-    return result;
+    return {std::move(result), dir_path_ + "/" + file_name};
   }
 
   bool maybe_enqueue_crash(Crash* crash) {
@@ -124,8 +127,7 @@
     time_t oldest_time = std::numeric_limits<time_t>::max();
 
     for (size_t i = 0; i < max_artifacts_; ++i) {
-      std::string path = android::base::StringPrintf("%s/%s%02zu", dir_path_.c_str(),
-                                                     file_name_prefix_.c_str(), i);
+      std::string path = StringPrintf("%s/%s%02zu", dir_path_.c_str(), file_name_prefix_.c_str(), i);
       struct stat st;
       if (stat(path.c_str(), &st) != 0) {
         if (errno == ENOENT) {
@@ -183,6 +185,7 @@
   unique_fd crash_fd;
   pid_t crash_pid;
   event* crash_event = nullptr;
+  std::string crash_path;
 
   DebuggerdDumpType crash_type;
 };
@@ -203,7 +206,7 @@
 static void perform_request(Crash* crash) {
   unique_fd output_fd;
   if (!intercept_manager->GetIntercept(crash->crash_pid, crash->crash_type, &output_fd)) {
-    output_fd = get_crash_queue(crash)->get_output_fd();
+    std::tie(output_fd, crash->crash_path) = get_crash_queue(crash)->get_output();
   }
 
   TombstonedCrashPacket response = {
@@ -341,6 +344,10 @@
     goto fail;
   }
 
+  if (!crash->crash_path.empty()) {
+    LOG(ERROR) << "Tombstone written to: " << crash->crash_path;
+  }
+
 fail:
   CrashQueue* queue = get_crash_queue(crash);
   delete crash;
diff --git a/fs_mgr/fs_mgr_fstab.cpp b/fs_mgr/fs_mgr_fstab.cpp
index 23bd664..6c527c5 100644
--- a/fs_mgr/fs_mgr_fstab.cpp
+++ b/fs_mgr/fs_mgr_fstab.cpp
@@ -389,16 +389,8 @@
 
     dirent* dp;
     while ((dp = readdir(fstabdir.get())) != NULL) {
-        // skip over name and compatible
-        if (dp->d_type != DT_DIR) {
-            continue;
-        }
-
-        // skip if its not 'vendor', 'odm' or 'system'
-        if (strcmp(dp->d_name, "odm") && strcmp(dp->d_name, "system") &&
-            strcmp(dp->d_name, "vendor")) {
-            continue;
-        }
+        // skip over name, compatible and .
+        if (dp->d_type != DT_DIR || dp->d_name[0] == '.') continue;
 
         // create <dev> <mnt_point>  <type>  <mnt_flags>  <fsmgr_flags>\n
         std::vector<std::string> fstab_entry;
diff --git a/init/init_first_stage.cpp b/init/init_first_stage.cpp
index 8a7d9a2..0f2b1f3 100644
--- a/init/init_first_stage.cpp
+++ b/init/init_first_stage.cpp
@@ -60,9 +60,8 @@
     virtual bool SetUpDmVerity(fstab_rec* fstab_rec) = 0;
 
     bool need_dm_verity_;
-    // Device tree fstab entries.
+
     std::unique_ptr<fstab, decltype(&fs_mgr_free_fstab)> device_tree_fstab_;
-    // Eligible first stage mount candidates, only allow /system, /vendor and/or /odm.
     std::vector<fstab_rec*> mount_fstab_recs_;
     std::set<std::string> required_devices_partition_names_;
     DeviceHandler device_handler_;
@@ -115,12 +114,10 @@
         LOG(ERROR) << "Failed to read fstab from device tree";
         return;
     }
-    for (auto mount_point : {"/system", "/vendor", "/odm"}) {
-        fstab_rec* fstab_rec =
-            fs_mgr_get_entry_for_mount_point(device_tree_fstab_.get(), mount_point);
-        if (fstab_rec != nullptr) {
-            mount_fstab_recs_.push_back(fstab_rec);
-        }
+    // Stores device_tree_fstab_->recs[] into mount_fstab_recs_ (vector<fstab_rec*>)
+    // for easier manipulation later, e.g., range-base for loop.
+    for (int i = 0; i < device_tree_fstab_->num_entries; i++) {
+        mount_fstab_recs_.push_back(&device_tree_fstab_->recs[i]);
     }
 }
 
@@ -420,7 +417,7 @@
 
 // Public functions
 // ----------------
-// Mounts /system, /vendor, and/or /odm if they are present in the fstab provided by device tree.
+// Mounts partitions specified by fstab in device tree.
 bool DoFirstStageMount() {
     // Skips first stage mount if we're in recovery mode.
     if (IsRecoveryMode()) {
diff --git a/libappfuse/FuseBridgeLoop.cc b/libappfuse/FuseBridgeLoop.cc
index 3f47066..0792307 100644
--- a/libappfuse/FuseBridgeLoop.cc
+++ b/libappfuse/FuseBridgeLoop.cc
@@ -57,6 +57,12 @@
             return;
     }
 }
+
+void LogResponseError(const std::string& message, const FuseResponse& response) {
+    LOG(ERROR) << message << ": header.len=" << response.header.len
+               << " header.error=" << response.header.error
+               << " header.unique=" << response.header.unique;
+}
 }
 
 class FuseBridgeEntry {
@@ -135,6 +141,7 @@
         }
 
         if (!buffer_.response.Write(device_fd_)) {
+            LogResponseError("Failed to write a reply from proxy to device", buffer_.response);
             return FuseBridgeState::kClosing;
         }
 
@@ -200,6 +207,7 @@
         }
 
         if (!buffer_.response.Write(device_fd_)) {
+            LogResponseError("Failed to write a response to device", buffer_.response);
             return FuseBridgeState::kClosing;
         }
 
@@ -215,6 +223,11 @@
             case ResultOrAgain::kSuccess:
                 return FuseBridgeState::kWaitToReadEither;
             case ResultOrAgain::kFailure:
+                LOG(ERROR) << "Failed to write a request to proxy:"
+                           << " header.len=" << buffer_.request.header.len
+                           << " header.opcode=" << buffer_.request.header.opcode
+                           << " header.unique=" << buffer_.request.header.unique
+                           << " header.nodeid=" << buffer_.request.header.nodeid;
                 return FuseBridgeState::kClosing;
             case ResultOrAgain::kAgain:
                 return FuseBridgeState::kWaitToWriteProxy;
diff --git a/libappfuse/FuseBuffer.cc b/libappfuse/FuseBuffer.cc
index 653e96b..1b47e0a 100644
--- a/libappfuse/FuseBuffer.cc
+++ b/libappfuse/FuseBuffer.cc
@@ -115,7 +115,10 @@
                 case EAGAIN:
                     return ResultOrAgain::kAgain;
                 default:
-                    PLOG(ERROR) << "Failed to write a FUSE message";
+                    PLOG(ERROR) << "Failed to write a FUSE message: "
+                                << "fd=" << fd << " "
+                                << "sockflag=" << sockflag << " "
+                                << "data=" << data;
                     return ResultOrAgain::kFailure;
             }
         }
diff --git a/qemu_pipe/Android.bp b/qemu_pipe/Android.bp
new file mode 100644
index 0000000..93c347b
--- /dev/null
+++ b/qemu_pipe/Android.bp
@@ -0,0 +1,14 @@
+// Copyright 2011 The Android Open Source Project
+
+cc_library_static {
+    name: "libqemu_pipe",
+    vendor_available: true,
+    sanitize: {
+        misc_undefined: ["integer"],
+    },
+    srcs: ["qemu_pipe.cpp"],
+    local_include_dirs: ["include"],
+    static_libs: ["libbase"],
+    export_include_dirs: ["include"],
+    cflags: ["-Werror"],
+}
diff --git a/qemu_pipe/Android.mk b/qemu_pipe/Android.mk
deleted file mode 100644
index 6e0144c..0000000
--- a/qemu_pipe/Android.mk
+++ /dev/null
@@ -1,19 +0,0 @@
-# Copyright 2011 The Android Open Source Project
-
-LOCAL_PATH:= $(call my-dir)
-
-common_static_libraries := \
-    libbase
-include $(CLEAR_VARS)
-LOCAL_CLANG := true
-LOCAL_SANITIZE := integer
-LOCAL_SRC_FILES:= \
-    qemu_pipe.cpp
-LOCAL_C_INCLUDES := \
-    $(LOCAL_PATH)/include \
-    system/base/include
-LOCAL_MODULE:= libqemu_pipe
-LOCAL_STATIC_LIBRARIES := $(common_static_libraries)
-LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
-LOCAL_CFLAGS := -Werror
-include $(BUILD_STATIC_LIBRARY)
diff --git a/rootdir/etc/ld.config.txt b/rootdir/etc/ld.config.txt
index 6db9acd..621b632 100644
--- a/rootdir/etc/ld.config.txt
+++ b/rootdir/etc/ld.config.txt
@@ -84,7 +84,7 @@
 namespace.rs.asan.permitted.paths = /data/asan/vendor/${LIB}:/vendor/${LIB}:/data
 
 namespace.rs.links = default,vndk
-namespace.rs.link.default.shared_libs = libc.so:libm.so:libdl.so:libstdc++.so:liblog.so:libnativewindow.so:libEGL.so:libsync.so:libGLESv1_CM.so:libGLESv2.so:libmediandk.so:libui.so:libvndksupport.so
+namespace.rs.link.default.shared_libs = libc.so:libm.so:libdl.so:libstdc++.so:liblog.so:libnativewindow.so:libEGL.so:libsync.so:libGLESv1_CM.so:libGLESv2.so:libmediandk.so:libvndksupport.so
 namespace.rs.link.vndk.shared_libs = android.hardware.renderscript@1.0.so:android.hardware.graphics.allocator@2.0.so:android.hardware.graphics.mapper@2.0.so:android.hardware.graphics.common@1.0.so:libhwbinder.so:libbase.so:libcutils.so:libhardware.so:libhidlbase.so:libhidltransport.so:libion.so:libutils.so:libc++.so:libz.so
 
 ###############################################################################