url: process crash via malformed UNC hostname in pathToFileURL()

Fixes: #62546

Author: NickNaso

src/node_url.cc

@@ -169,7 +169,10 @@ void BindingData::PathToFileURL(const FunctionCallbackInfo<Value>& args) {
       [[unlikely]] {
     CHECK(args[2]->IsString());
     Utf8Value hostname(isolate, args[2]);
-    CHECK(out->set_hostname(hostname.ToStringView()));
+    if (!out->set_hostname(hostname.ToStringView())) {
+      return ThrowInvalidURL(
+          realm->env(), input.ToStringView(), std::string(hostname.ToStringView()));
+    }
   }
 
   binding_data->UpdateComponents(out->get_components(), out->type);

test/parallel/test-url-pathtofileurl.js

@@ -21,6 +21,14 @@ const url = require('url');
   assert.ok(fileURL.includes('%25'));
 }
 
+{
+  assert.throws(() => {
+    url.pathToFileURL('\\\\exa mple\\share\\file.txt', { windows: true });
+  }, {
+    code: 'ERR_INVALID_URL',
+  });
+}
+
 {
   if (isWindows) {
     // UNC path: \\server\share\resource