diff --git a/debuggerd/crash_dump.cpp b/debuggerd/crash_dump.cpp
index cf4c5d5..3563436 100644
--- a/debuggerd/crash_dump.cpp
+++ b/debuggerd/crash_dump.cpp
@@ -142,7 +142,8 @@
   return false;
 }
 
-static bool activity_manager_notify(pid_t pid, int signal, const std::string& amfd_data) {
+static bool activity_manager_notify(pid_t pid, int signal, const std::string& amfd_data,
+                                    bool recoverable_gwp_asan_crash) {
   ATRACE_CALL();
   android::base::unique_fd amfd(socket_local_client(
       "/data/system/ndebugsocket", ANDROID_SOCKET_NAMESPACE_FILESYSTEM, SOCK_STREAM));
@@ -165,19 +166,32 @@
     return false;
   }
 
-  // Activity Manager protocol: binary 32-bit network-byte-order ints for the
-  // pid and signal number, followed by the raw text of the dump, culminating
-  // in a zero byte that marks end-of-data.
+  // Activity Manager protocol:
+  //  - 32-bit network-byte-order: pid
+  //  - 32-bit network-byte-order: signal number
+  //  - byte: recoverable_gwp_asan_crash
+  //  - bytes: raw text of the dump
+  //  - null terminator
+
   uint32_t datum = htonl(pid);
-  if (!android::base::WriteFully(amfd, &datum, 4)) {
+  if (!android::base::WriteFully(amfd, &datum, sizeof(datum))) {
     PLOG(ERROR) << "AM pid write failed";
     return false;
   }
+
   datum = htonl(signal);
-  if (!android::base::WriteFully(amfd, &datum, 4)) {
-    PLOG(ERROR) << "AM signal write failed";
+  if (!android::base::WriteFully(amfd, &datum, sizeof(datum))) {
+    PLOG(ERROR) << "AM signo write failed";
     return false;
   }
+
+  uint8_t recoverable_gwp_asan_crash_byte = recoverable_gwp_asan_crash ? 1 : 0;
+  if (!android::base::WriteFully(amfd, &recoverable_gwp_asan_crash_byte,
+                                 sizeof(recoverable_gwp_asan_crash_byte))) {
+    PLOG(ERROR) << "AM recoverable_gwp_asan_crash_byte write failed";
+    return false;
+  }
+
   if (!android::base::WriteFully(amfd, amfd_data.c_str(), amfd_data.size() + 1)) {
     PLOG(ERROR) << "AM data write failed";
     return false;
@@ -651,10 +665,10 @@
     }
   }
 
-  if (fatal_signal && !recoverable_gwp_asan_crash) {
+  if (fatal_signal) {
     // Don't try to notify ActivityManager if it just crashed, or we might hang until timeout.
     if (thread_info[target_process].thread_name != "system_server") {
-      activity_manager_notify(target_process, signo, amfd_data);
+      activity_manager_notify(target_process, signo, amfd_data, recoverable_gwp_asan_crash);
     }
   }
 
diff --git a/fastboot/fastboot.cpp b/fastboot/fastboot.cpp
index e76cbc5..b977e31 100644
--- a/fastboot/fastboot.cpp
+++ b/fastboot/fastboot.cpp
@@ -1197,7 +1197,8 @@
 }
 
 static void copy_avb_footer(const std::string& partition, struct fastboot_buffer* buf) {
-    if (buf->sz < AVB_FOOTER_SIZE || is_logical(partition)) {
+    if (buf->sz < AVB_FOOTER_SIZE || is_logical(partition) ||
+        should_flash_in_userspace(partition)) {
         return;
     }
     // If overflows and negative, it should be < buf->sz.
@@ -1559,10 +1560,10 @@
     }
 }
 
-std::string GetPartitionName(const ImageEntry& entry, std::string& current_slot) {
+std::string GetPartitionName(const ImageEntry& entry) {
     auto slot = entry.second;
     if (slot.empty()) {
-        slot = current_slot;
+        slot = get_current_slot();
     }
     if (slot.empty()) {
         return entry.first->part_name;
@@ -1581,7 +1582,7 @@
 
   private:
     void CheckRequirements();
-    void DetermineSlot();
+    void DetermineSecondarySlot();
     void CollectImages();
     void FlashImages(const std::vector<std::pair<const Image*, std::string>>& images);
     void FlashImage(const Image& image, const std::string& slot, fastboot_buffer* buf);
@@ -1599,15 +1600,13 @@
 
     // Change the slot first, so we boot into the correct recovery image when
     // using fastbootd.
-    if (fp_->slot == "all") {
+    if (fp_->slot_override == "all") {
         set_active("a");
     } else {
-        set_active(fp_->slot);
+        set_active(fp_->slot_override);
     }
 
-    DetermineSlot();
-    CollectImages();
-
+    DetermineSecondarySlot();
     CancelSnapshotIfNeeded();
 
     // First flash boot partitions. We allow this to happen either in userspace
@@ -1652,18 +1651,12 @@
     ::CheckRequirements({contents.data(), contents.size()}, fp_->force_flash);
 }
 
-void FlashAllTool::DetermineSlot() {
-    if (fp_->slot.empty()) {
-        fp_->current_slot = get_current_slot();
-    } else {
-        fp_->current_slot = fp_->slot;
-    }
-
+void FlashAllTool::DetermineSecondarySlot() {
     if (fp_->skip_secondary) {
         return;
     }
-    if (fp_->slot != "" && fp_->slot != "all") {
-        fp_->secondary_slot = get_other_slot(fp_->slot);
+    if (fp_->slot_override != "" && fp_->slot_override != "all") {
+        fp_->secondary_slot = get_other_slot(fp_->slot_override);
     } else {
         fp_->secondary_slot = get_other_slot();
     }
@@ -1677,7 +1670,7 @@
 
 void FlashAllTool::CollectImages() {
     for (size_t i = 0; i < images.size(); ++i) {
-        std::string slot = fp_->slot;
+        std::string slot = fp_->slot_override;
         if (images[i].IsSecondary()) {
             if (fp_->skip_secondary) {
                 continue;
diff --git a/fastboot/fastboot.h b/fastboot/fastboot.h
index c954487..029b583 100644
--- a/fastboot/fastboot.h
+++ b/fastboot/fastboot.h
@@ -80,8 +80,7 @@
     bool skip_secondary = false;
     bool force_flash = false;
 
-    std::string slot;
-    std::string current_slot;
+    std::string slot_override;
     std::string secondary_slot;
     fastboot::FastBootDriver* fb;
 };
@@ -103,7 +102,7 @@
 
 Result<NetworkSerial, FastbootError> ParseNetworkSerial(const std::string& serial);
 bool supports_AB();
-std::string GetPartitionName(const ImageEntry& entry, std::string& current_slot_);
+std::string GetPartitionName(const ImageEntry& entry);
 void flash_partition_files(const std::string& partition, const std::vector<SparsePtr>& files);
 int64_t get_sparse_limit(int64_t size);
 std::vector<SparsePtr> resparse_file(sparse_file* s, int64_t max_size);
diff --git a/fastboot/task.cpp b/fastboot/task.cpp
index 9268b29..3d2c975 100644
--- a/fastboot/task.cpp
+++ b/fastboot/task.cpp
@@ -95,7 +95,7 @@
         LOG(VERBOSE) << "Cannot optimize flashing super on non-AB device";
         return nullptr;
     }
-    if (fp->slot == "all") {
+    if (fp->slot_override == "all") {
         LOG(VERBOSE) << "Cannot optimize flashing super for all slots";
         return nullptr;
     }
@@ -132,7 +132,7 @@
     }
 
     for (const auto& entry : os_images) {
-        auto partition = GetPartitionName(entry, fp->current_slot);
+        auto partition = GetPartitionName(entry);
         auto image = entry.first;
 
         if (!helper->AddPartition(partition, image->img_name, image->optional_if_no_image)) {
@@ -145,7 +145,7 @@
 
     // Remove images that we already flashed, just in case we have non-dynamic OS images.
     auto remove_if_callback = [&](const ImageEntry& entry) -> bool {
-        return helper->WillFlash(GetPartitionName(entry, fp->current_slot));
+        return helper->WillFlash(GetPartitionName(entry));
     };
     os_images.erase(std::remove_if(os_images.begin(), os_images.end(), remove_if_callback),
                     os_images.end());
@@ -201,9 +201,13 @@
 void WipeTask::Run() {
     std::string partition_type;
     if (fp_->fb->GetVar("partition-type:" + pname_, &partition_type) != fastboot::SUCCESS) {
+        LOG(ERROR) << "wipe task partition not found: " << pname_;
         return;
     }
     if (partition_type.empty()) return;
-    fp_->fb->Erase(pname_);
+    if (fp_->fb->Erase(pname_) != fastboot::SUCCESS) {
+        LOG(ERROR) << "wipe task erase failed with partition: " << pname_;
+        return;
+    }
     fb_perform_format(pname_, 1, partition_type, "", fp_->fs_options);
 }
diff --git a/libprocessgroup/processgroup.cpp b/libprocessgroup/processgroup.cpp
index f7af08b..38eb92f 100644
--- a/libprocessgroup/processgroup.cpp
+++ b/libprocessgroup/processgroup.cpp
@@ -446,14 +446,9 @@
 
 static int KillProcessGroup(uid_t uid, int initialPid, int signal, int retries,
                             int* max_processes) {
-    if (uid < 0) {
-        LOG(ERROR) << __func__ << ": invalid UID " << uid;
-        return -1;
-    }
-    if (initialPid <= 0) {
-        LOG(ERROR) << __func__ << ": invalid PID " << initialPid;
-        return -1;
-    }
+    CHECK_GE(uid, 0);
+    CHECK_GT(initialPid, 0);
+
     std::string hierarchy_root_path;
     if (CgroupsAvailable()) {
         CgroupGetControllerPath(CGROUPV2_CONTROLLER_NAME, &hierarchy_root_path);
@@ -590,7 +585,8 @@
 }
 
 int createProcessGroup(uid_t uid, int initialPid, bool memControl) {
-    std::string cgroup;
+    CHECK_GE(uid, 0);
+    CHECK_GT(initialPid, 0);
 
     if (memControl && !UsePerAppMemcg()) {
         PLOG(ERROR) << "service memory controls are used without per-process memory cgroup support";
@@ -608,6 +604,7 @@
         }
     }
 
+    std::string cgroup;
     CgroupGetControllerPath(CGROUPV2_CONTROLLER_NAME, &cgroup);
     return createProcessGroupInternal(uid, initialPid, cgroup, true);
 }