From 5349b8a45ed2712302e85b258d3789808e1bd96d Mon Sep 17 00:00:00 2001
From: steiler <github@vahlenkamp.net>
Date: Thu, 16 Nov 2023 12:08:26 +0100
Subject: utils: merkletrie, Skip loading sockets as filesystem nodes. Fixes
 #312

---
 utils/merkletrie/filesystem/node.go      |  4 ++++
 utils/merkletrie/filesystem/node_test.go | 26 ++++++++++++++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/utils/merkletrie/filesystem/node.go b/utils/merkletrie/filesystem/node.go
index ad169ff..7bba0d0 100644
--- a/utils/merkletrie/filesystem/node.go
+++ b/utils/merkletrie/filesystem/node.go
@@ -103,6 +103,10 @@ func (n *node) calculateChildren() error {
 			continue
 		}
 
+		if file.Mode()&os.ModeSocket != 0 {
+			continue
+		}
+
 		c, err := n.newChildNode(file)
 		if err != nil {
 			return err
diff --git a/utils/merkletrie/filesystem/node_test.go b/utils/merkletrie/filesystem/node_test.go
index 159e63d..b76abc4 100644
--- a/utils/merkletrie/filesystem/node_test.go
+++ b/utils/merkletrie/filesystem/node_test.go
@@ -2,9 +2,12 @@ package filesystem
 
 import (
 	"bytes"
+	"fmt"
 	"io"
+	"net"
 	"os"
 	"path"
+	"runtime"
 	"testing"
 
 	"github.com/go-git/go-git/v5/plumbing"
@@ -13,6 +16,7 @@ import (
 
 	"github.com/go-git/go-billy/v5"
 	"github.com/go-git/go-billy/v5/memfs"
+	"github.com/go-git/go-billy/v5/osfs"
 	. "gopkg.in/check.v1"
 )
 
@@ -196,6 +200,28 @@ func (s *NoderSuite) TestDiffDirectory(c *C) {
 	c.Assert(a, Equals, merkletrie.Modify)
 }
 
+func (s *NoderSuite) TestSocket(c *C) {
+	if runtime.GOOS == "windows" {
+		c.Skip("socket files do not exist on windows")
+	}
+
+	td, err := os.MkdirTemp("", "socket-test")
+	defer os.RemoveAll(td)
+	c.Assert(err, IsNil)
+
+	sock, err := net.ListenUnix("unix", &net.UnixAddr{Name: fmt.Sprintf("%s/socket", td), Net: "unix"})
+	c.Assert(err, IsNil)
+	defer sock.Close()
+
+	fsA := osfs.New(td)
+	WriteFile(fsA, "foo", []byte("foo"), 0644)
+
+	noder := NewRootNode(fsA, nil)
+	childs, err := noder.Children()
+	c.Assert(err, IsNil)
+	c.Assert(childs, HasLen, 1)
+}
+
 func WriteFile(fs billy.Filesystem, filename string, data []byte, perm os.FileMode) error {
 	f, err := fs.OpenFile(filename, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, perm)
 	if err != nil {
-- 
cgit