use TypedArrayPrototypeGetByteLength

Author: mertcanaltin

lib/buffer.js

@@ -621,15 +621,16 @@ Buffer.concat = function concat(list, length) {
         throw new ERR_INVALID_ARG_TYPE(
           `list[${i}]`, ['Buffer', 'Uint8Array'], buf);
       }
-      length += buf.length;
+      length += TypedArrayPrototypeGetByteLength(buf);
     }
 
     const buffer = allocate(length);
     let pos = 0;
     for (let i = 0; i < list.length; i++) {
       const buf = list[i];
+      const bufLength = TypedArrayPrototypeGetByteLength(buf);
       TypedArrayPrototypeSet(buffer, buf, pos);
-      pos += buf.length;
+      pos += bufLength;
     }
 
     if (pos < length) {
@@ -652,15 +653,16 @@ Buffer.concat = function concat(list, length) {
   let pos = 0;
   for (let i = 0; i < list.length; i++) {
     const buf = list[i];
-    if (pos + buf.length > length) {
+    const bufLength = TypedArrayPrototypeGetByteLength(buf);
+    if (pos + bufLength > length) {
       TypedArrayPrototypeSet(buffer,
                              TypedArrayPrototypeSlice(buf, 0, length - pos),
                              pos);
       pos = length;
       break;
     }
     TypedArrayPrototypeSet(buffer, buf, pos);
-    pos += buf.length;
+    pos += bufLength;
   }
 
   // Note: `length` is always equal to `buffer.length` at this point