Check for empty buffer (#7)

Avoids panic on empty tags
Velocidex · Jan 11, 2020 · 4b74844 · 4b74844
1 parent 0c80dd2
commit 4b74844
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/parser/pages.go b/parser/pages.go
@@ -22,7 +22,8 @@ func (self *Value) Reader() io.ReaderAt {
 
 func NewValue(ctx *ESEContext, tag *Tag, PageID int64, buffer []byte) *Value {
 	result := &Value{Tag: tag, PageID: PageID, Buffer: buffer}
-	if ctx.Version == 0x620 && ctx.Revision >= 17 && ctx.PageSize > 8192 {
+	if ctx.Version == 0x620 && ctx.Revision >= 17 &&
+		ctx.PageSize > 8192 && len(buffer) > 0 {
 		result.Flags = uint64(buffer[1] >> 5)
 		buffer[1] &= 0x1f
 	} else {