From 80e3b12b987a26fe7754c0e79e15d58557bdb939 Mon Sep 17 00:00:00 2001
From: Dustin Oprea <dustin@randomingenuity.com>
Date: Sat, 2 May 2020 16:24:00 -0400
Subject: [PATCH] undefined/exif_9286_user_comment.go: Validate for minimum
 user-notes size

---
 v2/undefined/exif_9286_user_comment.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/v2/undefined/exif_9286_user_comment.go b/v2/undefined/exif_9286_user_comment.go
index 7b92f10..0e36b00 100644
--- a/v2/undefined/exif_9286_user_comment.go
+++ b/v2/undefined/exif_9286_user_comment.go
@@ -105,6 +105,10 @@ func (Codec9286UserComment) Decode(valueContext *exifcommon.ValueContext) (value
     valueBytes, err := valueContext.ReadBytes()
     log.PanicIf(err)
 
+    if len(valueBytes) < 8 {
+        return nil, ErrUnparseableValue
+    }
+
     unknownUc := Tag9286UserComment{
         EncodingType:  TagUndefinedType_9286_UserComment_Encoding_UNDEFINED,
         EncodingBytes: []byte{},