From d0014f64a5c57c0c3f215f600779776bd8c16ba6 Mon Sep 17 00:00:00 2001
From: JokerSun <781487810@qq.com>
Date: Wed, 17 Apr 2019 09:41:17 +0800
Subject: [PATCH] AuthorityUtils Null Check

Fixes: gh-6773
---
 .../springframework/security/core/authority/AuthorityUtils.java | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/core/src/main/java/org/springframework/security/core/authority/AuthorityUtils.java b/core/src/main/java/org/springframework/security/core/authority/AuthorityUtils.java
index 15b3507a1fe..4cfe410067a 100644
--- a/core/src/main/java/org/springframework/security/core/authority/AuthorityUtils.java
+++ b/core/src/main/java/org/springframework/security/core/authority/AuthorityUtils.java
@@ -24,6 +24,7 @@
 
 import org.springframework.security.core.GrantedAuthority;
 import org.springframework.util.StringUtils;
+import org.springframework.util.Assert;
 
 /**
  * Utility method for manipulating <tt>GrantedAuthority</tt> collections etc.
@@ -55,6 +56,7 @@ public static List<GrantedAuthority> commaSeparatedStringToAuthorityList(
 	 */
 	public static Set<String> authorityListToSet(
 			Collection<? extends GrantedAuthority> userAuthorities) {
+		Assert.notNull(userAuthorities, "userAuthorities cannot be null");
 		Set<String> set = new HashSet<>(userAuthorities.size());
 
 		for (GrantedAuthority authority : userAuthorities) {