diff --git a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillWriter.java b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillWriter.java
index 9399024f0178..c1d71a23b1db 100644
--- a/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillWriter.java
+++ b/core/src/main/java/org/apache/spark/util/collection/unsafe/sort/UnsafeSorterSpillWriter.java
@@ -42,7 +42,10 @@ public final class UnsafeSorterSpillWriter {
 
   private final SparkConf conf = new SparkConf();
 
-  /** The buffer size to use when writing the sorted records to an on-disk file */
+  /**
+   * The buffer size to use when writing the sorted records to an on-disk file, and
+   * this space used by prefix + len + recordLength must be greater than 4 + 8 bytes.
+   */
   private final int diskWriteBufferSize =
     (int) (long) conf.get(package$.MODULE$.SHUFFLE_DISK_WRITE_BUFFER_SIZE());
 
diff --git a/core/src/main/scala/org/apache/spark/internal/config/package.scala b/core/src/main/scala/org/apache/spark/internal/config/package.scala
index e8b1d8859cc4..530bb45b0d5d 100644
--- a/core/src/main/scala/org/apache/spark/internal/config/package.scala
+++ b/core/src/main/scala/org/apache/spark/internal/config/package.scala
@@ -21,6 +21,7 @@ import java.util.concurrent.TimeUnit
 
 import org.apache.spark.launcher.SparkLauncher
 import org.apache.spark.network.util.ByteUnit
+import org.apache.spark.unsafe.array.ByteArrayMethods
 import org.apache.spark.util.Utils
 
 package object config {
@@ -495,8 +496,9 @@ package object config {
     ConfigBuilder("spark.shuffle.spill.diskWriteBufferSize")
       .doc("The buffer size, in bytes, to use when writing the sorted records to an on-disk file.")
       .bytesConf(ByteUnit.BYTE)
-      .checkValue(v => v > 0 && v <= Int.MaxValue,
-        s"The buffer size must be greater than 0 and less than ${Int.MaxValue}.")
+      .checkValue(v => v > 12 && v <= ByteArrayMethods.MAX_ROUNDED_ARRAY_LENGTH,
+        s"The buffer size must be greater than 12 and less than or equal to " +
+          s"${ByteArrayMethods.MAX_ROUNDED_ARRAY_LENGTH}.")
       .createWithDefault(1024 * 1024)
 
   private[spark] val UNROLL_MEMORY_CHECK_PERIOD =