From 96b38935a64c5631fe931ffbcc4d6a9978e8bd7b Mon Sep 17 00:00:00 2001
From: Caleb Gardner <calebq23@gmail.com>
Date: Sat, 18 Jun 2022 06:46:00 -0500
Subject: [PATCH] Found the problem file. NOW TO DEBUG

---
 exp_test.go                 | 6 +++---
 internal/metadata/reader.go | 6 ++++++
 squashfs_test.go            | 4 ++--
 3 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/exp_test.go b/exp_test.go
index b67d99d..cdca880 100644
--- a/exp_test.go
+++ b/exp_test.go
@@ -290,9 +290,9 @@ func TestSTUFF(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	os.Remove(wd + "/testing/test.txt")
-	testOut, _ := os.Create(wd + "/testing/test.txt")
-	testFil, err := rdr.Open("PortableApps/Notepad++Portable/App/Readme.txt")
+	os.Remove(wd + "/testing/test.xml")
+	testOut, _ := os.Create(wd + "/testing/test.xml")
+	testFil, err := rdr.Open("PortableApps/Notepad++Portable/App/Notepad++64/functionList/cobol-free.xml")
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/internal/metadata/reader.go b/internal/metadata/reader.go
index a5e48fb..3496150 100644
--- a/internal/metadata/reader.go
+++ b/internal/metadata/reader.go
@@ -2,6 +2,8 @@ package metadata
 
 import (
 	"encoding/binary"
+	"errors"
+	"fmt"
 	"io"
 
 	"github.com/CalebQ42/squashfs/internal/decompress"
@@ -36,6 +38,10 @@ func (r *Reader) Advance() error {
 	}
 	comp := size&0x8000 != 0x8000
 	size &^= 0x8000
+	if size > 8196 {
+		fmt.Println("uhoh")
+		return errors.New("AH")
+	}
 	r.cur = io.LimitReader(r.master, int64(size))
 	if comp {
 		r.cur, err = r.d.Reader(r.cur)
diff --git a/squashfs_test.go b/squashfs_test.go
index 9960012..d22c000 100644
--- a/squashfs_test.go
+++ b/squashfs_test.go
@@ -72,8 +72,8 @@ func TestExtractQuick(t *testing.T) {
 	}
 	op := squashfs.DefaultOptions()
 	op.Verbose = true
-	sub := 
-	err = rdr.ExtractWithOptions(libPath, op)
+	sub, _ := rdr.Sub("PortableApps/Notepad++Portable/App/Notepad++64/functionList")
+	err = sub.(*squashfs.FS).ExtractWithOptions(libPath, op)
 	if err != nil {
 		t.Fatal(err)
 	}