1 files changed, 19 insertions, 1 deletions
diff --git a/lib/internal/fs/utils.js b/lib/internal/fs/utils.js
index 3b4ef8c423..6b50a60051 100644
--- a/lib/internal/fs/utils.js
+++ b/lib/internal/fs/utils.js
@@ -47,7 +47,8 @@ const {
   validateAbortSignal,
   validateBoolean,
   validateInt32,
-  validateUint32
+  validateInteger,
+  validateUint32,
 } = require('internal/validators');
 const pathModule = require('path');
 const kType = Symbol('type');
@@ -818,6 +819,22 @@ const validateStringAfterArrayBufferView = hideStackFrames((buffer, name) => {
   );
 });
 
+const validatePosition = hideStackFrames((position, name) => {
+  if (typeof position === 'number') {
+    validateInteger(position, 'position');
+  } else if (typeof position === 'bigint') {
+    if (!(position >= -(2n ** 63n) && position <= 2n ** 63n - 1n)) {
+      throw new ERR_OUT_OF_RANGE('position',
+                                 `>= ${-(2n ** 63n)} && <= ${2n ** 63n - 1n}`,
+                                 position);
+    }
+  } else {
+    throw new ERR_INVALID_ARG_TYPE('position',
+                                   ['integer', 'bigint'],
+                                   position);
+  }
+});
+
 module.exports = {
   assertEncoding,
   BigIntStats,  // for testing
@@ -841,6 +858,7 @@ module.exports = {
   validateOffsetLengthRead,
   validateOffsetLengthWrite,
   validatePath,
+  validatePosition,
   validateRmOptions,
   validateRmOptionsSync,
   validateRmdirOptions,