Add bounds checking to a method where it was missing (#8673)

CurtHagenlocher · bjornharrtell · aardappel · web-flow · commit a6b337f8031f · 2025-08-28T16:06:03.000-07:00
Co-authored-by: Björn Harrtell &lt;bjornharrtell@users.noreply.github.com&gt;
Co-authored-by: Wouter van Oortmerssen &lt;aardappel@gmail.com&gt;
diff --git a/net/FlatBuffers/ByteBuffer.cs b/net/FlatBuffers/ByteBuffer.cs
@@ -693,6 +693,7 @@ public byte Get(int index)
 #if ENABLE_SPAN_T && UNSAFE_BYTEBUFFER
         public unsafe string GetStringUTF8(int startPos, int len)
         {
+            AssertOffsetAndLength(startPos, len);
             fixed (byte* buffer = &MemoryMarshal.GetReference(_buffer.ReadOnlySpan.Slice(startPos)))
             {
                 return Encoding.UTF8.GetString(buffer, len);

Original file line number	Diff line number	Diff line change
`@@ -693,6 +693,7 @@ public byte Get(int index)`
`693`	`693`	`#if ENABLE_SPAN_T && UNSAFE_BYTEBUFFER`
`694`	`694`	`public unsafe string GetStringUTF8(int startPos, int len)`
`695`	`695`	`{`
	`696`	`+ AssertOffsetAndLength(startPos, len);`
`696`	`697`	`fixed (byte* buffer = &MemoryMarshal.GetReference(_buffer.ReadOnlySpan.Slice(startPos)))`
`697`	`698`	`{`
`698`	`699`	`return Encoding.UTF8.GetString(buffer, len);`