From adf31064aa94a982c2d2b32c456111d3e09b3bbb Mon Sep 17 00:00:00 2001
From: alexet <alexet@semmle.com>
Date: Mon, 11 Oct 2021 14:31:52 +0100
Subject: [PATCH] Avoid reading non-regular files.

---
 processor/file.go | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/processor/file.go b/processor/file.go
index c0864d026..fa586b841 100644
--- a/processor/file.go
+++ b/processor/file.go
@@ -234,6 +234,15 @@ func newFileJob(path, name string, fileInfo os.FileInfo) *FileJob {
 		fileInfo, _ = os.Lstat(symPath)
 	}
 
+	// Skip non-regular files. They are unlikely to be code and may hang if we
+	// try and read them.
+	if !fileInfo.Mode().IsRegular() {
+		if Verbose {
+			printWarn(fmt.Sprintf("skipping non-regular file: %s", path))
+		}
+		return nil
+	}
+
 	language, extension := DetectLanguage(name)
 
 	if len(language) != 0 {