loader: also register fs process for raw exefs partition

device_memory_manager: fix ScratchBuffer indexing

src/core/device_memory_manager.inc

@@ -31,9 +31,8 @@ public:
         buffer.resize(0);
         size_t index = 0;
         const auto add_value = [&](u32 value) {
-            buffer[index] = value;
-            index++;
-            buffer.resize(index);
+            buffer.resize(index + 1);
+            buffer[index++] = value;
         };
 
         u32 iter_entry = start_entry;

src/core/loader/nsp.cpp

@@ -10,6 +10,7 @@
 #include "core/file_sys/nca_metadata.h"
 #include "core/file_sys/patch_manager.h"
 #include "core/file_sys/registered_cache.h"
+#include "core/file_sys/romfs_factory.h"
 #include "core/file_sys/submission_package.h"
 #include "core/hle/kernel/k_process.h"
 #include "core/hle/service/filesystem/filesystem.h"
@@ -109,6 +110,13 @@ AppLoader_NSP::LoadResult AppLoader_NSP::Load(Kernel::KProcess& process, Core::S
         return result;
     }
 
+    if (nsp->IsExtractedType()) {
+        system.GetFileSystemController().RegisterProcess(
+            process.GetProcessId(), {},
+            std::make_shared<FileSys::RomFSFactory>(*this, system.GetContentProvider(),
+                                                    system.GetFileSystemController()));
+    }
+
     FileSys::VirtualFile update_raw;
     if (ReadUpdateRaw(update_raw) == ResultStatus::Success && update_raw != nullptr) {
         system.GetFileSystemController().SetPackedUpdate(process.GetProcessId(),