From 496497f81a2c64975c7bbb9bd45bef9a2db91687 Mon Sep 17 00:00:00 2001
From: "zhaozhao.zz" <zhaozhao.zz@alibaba-inc.com>
Date: Wed, 23 Jan 2019 23:57:18 +0800
Subject: [PATCH] ACL: fix null pointer in getuser

---
 src/acl.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/acl.c b/src/acl.c
index 99aa1032..da9d9cf9 100644
--- a/src/acl.c
+++ b/src/acl.c
@@ -560,6 +560,11 @@ void aclCommand(client *c) {
         }
     } else if (!strcasecmp(sub,"getuser") && c->argc == 3) {
         user *u = ACLGetUserByName(c->argv[2]->ptr,sdslen(c->argv[2]->ptr));
+        if (u == NULL) {
+            addReplyNull(c);
+            return;
+        }
+
         addReplyMapLen(c,2);
 
         /* Flags */