File _service:tar_scm:CVE-2021-25329-pre1.patch of Package tomcat

From d63695a656f04e39bd1ad4dee0f2339b0e3b898f Mon Sep 17 00:00:00 2001
From: Mark Thomas <markt@apache.org>
Date: Wed, 3 Oct 2018 11:16:07 +0000
Subject: [PATCH] Ensure that a canonical path is always used for the docBase
 of a Context to ensure consistent behaviour.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1842702 13f79535-47bb-0310-9956-ffa450edef68
---
 java/org/apache/catalina/startup/ContextConfig.java | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/java/org/apache/catalina/startup/ContextConfig.java b/java/org/apache/catalina/startup/ContextConfig.java
index be74f29168..f3935038fc 100644
--- a/java/org/apache/catalina/startup/ContextConfig.java
+++ b/java/org/apache/catalina/startup/ContextConfig.java
@@ -579,7 +579,7 @@ protected void fixDocBase() throws IOException {
 
         File file = new File(docBase);
         if (!file.isAbsolute()) {
-            docBase = (new File(appBase, docBase)).getPath();
+            docBase = (new File(appBase, docBase)).getCanonicalPath();
         } else {
             docBase = file.getCanonicalPath();
         }