fs: validate fd from cpp on fchown

PR-URL: #52051
Reviewed-By: Vinícius Lourenço Claro Cardoso <[email protected]>
Reviewed-By: Paolo Insogna <[email protected]>
Reviewed-By: Mohammed Keyvanzadeh <[email protected]>

Author: anonrig

lib/fs.js

@@ -2030,7 +2030,7 @@ function fchown(fd, uid, gid, callback) {
 
   const req = new FSReqCallback();
   req.oncomplete = callback;
-  binding.fchown(getValidatedFd(fd), uid, gid, req);
+  binding.fchown(fd, uid, gid, req);
 }
 
 /**
@@ -2044,7 +2044,7 @@ function fchownSync(fd, uid, gid) {
   validateInteger(uid, 'uid', -1, kMaxUserId);
   validateInteger(gid, 'gid', -1, kMaxUserId);
 
-  binding.fchown(getValidatedFd(fd), uid, gid);
+  binding.fchown(fd, uid, gid);
 }
 
 /**

src/node_file.cc

@@ -2598,8 +2598,10 @@ static void FChown(const FunctionCallbackInfo<Value>& args) {
   const int argc = args.Length();
   CHECK_GE(argc, 3);
 
-  CHECK(args[0]->IsInt32());
-  const int fd = args[0].As<Int32>()->Value();
+  int fd;
+  if (!GetValidatedFd(env, args[0]).To(&fd)) {
+    return;
+  }
 
   CHECK(IsSafeJsInt(args[1]));
   const uv_uid_t uid = static_cast<uv_uid_t>(args[1].As<Integer>()->Value());