From 0cf2df84d4b27af4bffd2bf3543838f09e10f874 Mon Sep 17 00:00:00 2001
From: Madelyn Olson <34459052+madolson@users.noreply.github.com>
Date: Thu, 12 Aug 2021 14:59:17 -0700
Subject: [PATCH] Added additional validation for cluster SETSLOT (#9360)

---
 src/cluster.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/cluster.c b/src/cluster.c
index e651d0c66..c7e1e66c5 100644
--- a/src/cluster.c
+++ b/src/cluster.c
@@ -4652,6 +4652,10 @@ NULL
                     (char*)c->argv[4]->ptr);
                 return;
             }
+            if (nodeIsSlave(n)) {
+                addReplyError(c,"Target node is not a master");
+                return;
+            }
             server.cluster->migrating_slots_to[slot] = n;
         } else if (!strcasecmp(c->argv[3]->ptr,"importing") && c->argc == 5) {
             if (server.cluster->slots[slot] == myself) {
@@ -4664,6 +4668,10 @@ NULL
                     (char*)c->argv[4]->ptr);
                 return;
             }
+            if (nodeIsSlave(n)) {
+                addReplyError(c,"Target node is not a master");
+                return;
+            }
             server.cluster->importing_slots_from[slot] = n;
         } else if (!strcasecmp(c->argv[3]->ptr,"stable") && c->argc == 4) {
             /* CLUSTER SETSLOT <SLOT> STABLE */