file_sys: handle null romfs

3 files changed, 14 insertions, 11 deletions

diff --git a/src/core/file_sys/patch_manager.cpp b/src/core/file_sys/patch_manager.cpp
index 0bca05587..cc7af2ea3 100644
--- a/src/core/file_sys/patch_manager.cpp
+++ b/src/core/file_sys/patch_manager.cpp
@@ -429,10 +429,6 @@ VirtualFile PatchManager::PatchRomFS(const NCA* base_nca, VirtualFile base_romfs
         LOG_DEBUG(Loader, "{}", log_string);
     }
 
-    if (base_romfs == nullptr) {
-        return base_romfs;
-    }
-
     auto romfs = base_romfs;
 
     // Game Updates
diff --git a/src/core/file_sys/romfs.cpp b/src/core/file_sys/romfs.cpp
index 1eb1f439a..6de2103a0 100644
--- a/src/core/file_sys/romfs.cpp
+++ b/src/core/file_sys/romfs.cpp
@@ -3,6 +3,7 @@
 
 #include <memory>
 
+#include "common/assert.h"
 #include "common/common_types.h"
 #include "common/string_util.h"
 #include "common/swap.h"
@@ -101,24 +102,30 @@ void ProcessDirectory(const VirtualFile& file, std::size_t dir_offset, std::size
 } // Anonymous namespace
 
 VirtualDir ExtractRomFS(VirtualFile file) {
+    auto root_container = std::make_shared<VectorVfsDirectory>();
+    if (!file) {
+        return root_container;
+    }
+
     RomFSHeader header{};
-    if (file->ReadObject(&header) != sizeof(RomFSHeader))
-        return nullptr;
+    if (file->ReadObject(&header) != sizeof(RomFSHeader)) {
+        return root_container;
+    }
 
-    if (header.header_size != sizeof(RomFSHeader))
-        return nullptr;
+    if (header.header_size != sizeof(RomFSHeader)) {
+        return root_container;
+    }
 
     const u64 file_offset = header.file_meta.offset;
     const u64 dir_offset = header.directory_meta.offset;
 
-    auto root_container = std::make_shared<VectorVfsDirectory>();
-
     ProcessDirectory(file, dir_offset, file_offset, header.data_offset, 0, root_container);
 
     if (auto root = root_container->GetSubdirectory(""); root) {
         return std::make_shared<CachedVfsDirectory>(std::move(root));
     }
 
+    ASSERT(false);
     return nullptr;
 }
 
diff --git a/src/core/file_sys/romfs_factory.cpp b/src/core/file_sys/romfs_factory.cpp
index 1bc07dae5..35e149905 100644
--- a/src/core/file_sys/romfs_factory.cpp
+++ b/src/core/file_sys/romfs_factory.cpp
@@ -22,7 +22,7 @@ RomFSFactory::RomFSFactory(Loader::AppLoader& app_loader, ContentProvider& provi
     : content_provider{provider}, filesystem_controller{controller} {
     // Load the RomFS from the app
     if (app_loader.ReadRomFS(file) != Loader::ResultStatus::Success) {
-        LOG_ERROR(Service_FS, "Unable to read RomFS!");
+        LOG_WARNING(Service_FS, "Unable to read base RomFS");
     }
 
     updatable = app_loader.IsRomFSUpdatable();