From 097d57f56e856920010c164da499b62ad06b9c2a Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Mon, 28 Jan 2019 18:15:59 +0100
Subject: [PATCH] ACL: fix crash when checking for subcommands.

---
 src/acl.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/acl.c b/src/acl.c
index 9503aec3..132ad79a 100644
--- a/src/acl.c
+++ b/src/acl.c
@@ -566,8 +566,13 @@ int ACLCheckCommandPerm(client *c) {
          * command is allowed just with that specific subcommand. */
         if (ACLGetUserCommandBit(u,id) == 0) {
             /* Check if the subcommand matches. */
-            if (u->allowed_subcommands == NULL || c->argc < 2)
+            if (c->argc < 2 ||
+                u->allowed_subcommands == NULL ||
+                u->allowed_subcommands[id] == NULL)
+            {
                 return ACL_DENIED_CMD;
+            }
+
             long subid = 0;
             while (1) {
                 if (u->allowed_subcommands[id][subid] == NULL)