3 files changed, 22 insertions, 9 deletions
diff --git a/src/core/hle/kernel/svc.cpp b/src/core/hle/kernel/svc.cpp
index ab10db3df..2fd07ab34 100644
--- a/src/core/hle/kernel/svc.cpp
+++ b/src/core/hle/kernel/svc.cpp
@@ -1339,6 +1339,20 @@ static ResultCode WaitProcessWideKeyAtomic(VAddr mutex_addr, VAddr condition_var
         "called mutex_addr={:X}, condition_variable_addr={:X}, thread_handle=0x{:08X}, timeout={}",
         mutex_addr, condition_variable_addr, thread_handle, nano_seconds);
 
+    if (Memory::IsKernelVirtualAddress(mutex_addr)) {
+        LOG_ERROR(
+            Kernel_SVC,
+            "Given mutex address must not be within the kernel address space. address=0x{:016X}",
+            mutex_addr);
+        return ERR_INVALID_ADDRESS_STATE;
+    }
+
+    if (!Common::IsWordAligned(mutex_addr)) {
+        LOG_ERROR(Kernel_SVC, "Given mutex address must be word-aligned. address=0x{:016X}",
+                  mutex_addr);
+        return ERR_INVALID_ADDRESS;
+    }
+
     auto* const current_process = Core::System::GetInstance().Kernel().CurrentProcess();
     const auto& handle_table = current_process->GetHandleTable();
     SharedPtr<Thread> thread = handle_table.Get<Thread>(thread_handle);
diff --git a/src/core/hle/result.h b/src/core/hle/result.h
index ab84f5ddc..8a3701151 100644
--- a/src/core/hle/result.h
+++ b/src/core/hle/result.h
@@ -119,10 +119,6 @@ union ResultCode {
     BitField<0, 9, ErrorModule> module;
     BitField<9, 13, u32> description;
 
-    // The last bit of `level` is checked by apps and the kernel to determine if a result code is an
-    // error
-    BitField<31, 1, u32> is_error;
-
     constexpr explicit ResultCode(u32 raw) : raw(raw) {}
 
     constexpr ResultCode(ErrorModule module_, u32 description_)
diff --git a/src/core/hle/service/filesystem/filesystem.cpp b/src/core/hle/service/filesystem/filesystem.cpp
index c6da2df43..1fbab2789 100644
--- a/src/core/hle/service/filesystem/filesystem.cpp
+++ b/src/core/hle/service/filesystem/filesystem.cpp
@@ -197,13 +197,16 @@ ResultCode VfsDirectoryServiceWrapper::RenameDirectory(const std::string& src_pa
 
 ResultVal<FileSys::VirtualFile> VfsDirectoryServiceWrapper::OpenFile(const std::string& path_,
                                                                      FileSys::Mode mode) const {
-    std::string path(FileUtil::SanitizePath(path_));
-    auto npath = path;
-    while (npath.size() > 0 && (npath[0] == '/' || npath[0] == '\\'))
-        npath = npath.substr(1);
+    const std::string path(FileUtil::SanitizePath(path_));
+    std::string_view npath = path;
+    while (!npath.empty() && (npath[0] == '/' || npath[0] == '\\')) {
+        npath.remove_prefix(1);
+    }
+
     auto file = backing->GetFileRelative(npath);
-    if (file == nullptr)
+    if (file == nullptr) {
         return FileSys::ERROR_PATH_NOT_FOUND;
+    }
 
     if (mode == FileSys::Mode::Append) {
         return MakeResult<FileSys::VirtualFile>(