From 1b257d00ca33436bb144df454ad9c9dba0d0453d Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Thu, 31 Jan 2019 18:32:49 +0100
Subject: [PATCH] ACL: check arity of LIST / USERS subcommand.

---
 src/acl.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/acl.c b/src/acl.c
index cf46ef812..58ffece34 100644
--- a/src/acl.c
+++ b/src/acl.c
@@ -973,7 +973,9 @@ void aclCommand(client *c) {
                 addReplyBulkCBuffer(c,thispat,sdslen(thispat));
             }
         }
-    } else if (!strcasecmp(sub,"list") || !strcasecmp(sub,"users")) {
+    } else if ((!strcasecmp(sub,"list") || !strcasecmp(sub,"users")) &&
+               c->argc == 2)
+    {
         int justnames = !strcasecmp(sub,"users");
         addReplyArrayLen(c,raxSize(Users));
         raxIterator ri;