fs: validate path in fs.readFile

PR-URL: https://github.com/nodejs/node/pull/17852
Refs: https://github.com/nodejs/node/pull/17667
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/fs.js b/lib/fs.js
index 7741e5838b..e41d0db033 100644
--- a/lib/fs.js
+++ b/lib/fs.js
@@ -389,6 +389,9 @@ fs.readFile = function(path, options, callback) {
       req.oncomplete(null, path);
     });
     return;
+  } else if (typeof path !== 'string' && !(path instanceof Buffer)) {
+    throw new errors.TypeError('ERR_INVALID_ARG_TYPE', 'path',
+                               ['string', 'Buffer', 'URL']);
   }
 
   binding.open(pathModule.toNamespacedPath(path),