fs: improve fchmod{Sync} validation

This commit validates the fd parameters to fs.fchmod{Sync} as
int32s instead of uint32s because they are ints in the binding
layer.

PR-URL: https://github.com/nodejs/node/pull/20588
Fixes: https://github.com/nodejs/node/issues/20498
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Weijia Wang <starkwang@126.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/fs.js b/lib/fs.js
index 6b0a88fac7..f46eabf9a0 100644
--- a/lib/fs.js
+++ b/lib/fs.js
@@ -1057,7 +1057,7 @@ fs.unlinkSync = function(path) {
 };
 
 fs.fchmod = function(fd, mode, callback) {
-  validateUint32(fd, 'fd');
+  validateInt32(fd, 'fd', 0);
   mode = validateAndMaskMode(mode, 'mode');
   callback = makeCallback(callback);
 
@@ -1067,7 +1067,7 @@ fs.fchmod = function(fd, mode, callback) {
 };
 
 fs.fchmodSync = function(fd, mode) {
-  validateUint32(fd, 'fd');
+  validateInt32(fd, 'fd', 0);
   mode = validateAndMaskMode(mode, 'mode');
   const ctx = {};
   binding.fchmod(fd, mode, undefined, ctx);