From 269760edbbf6cdebe1c00040234b1fa6ba8851ce Mon Sep 17 00:00:00 2001
From: "zhaozhao.zz" <zhaozhao.zz@alibaba-inc.com>
Date: Thu, 21 Sep 2017 14:19:21 +0800
Subject: [PATCH] Lazyfree: avoid memory leak when free slowlog entry

---
 src/slowlog.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/slowlog.c b/src/slowlog.c
index 805ee1d7..a9514715 100644
--- a/src/slowlog.c
+++ b/src/slowlog.c
@@ -72,9 +72,12 @@ slowlogEntry *slowlogCreateEntry(client *c, robj **argv, int argc, long long dur
                     (unsigned long)
                     sdslen(argv[j]->ptr) - SLOWLOG_ENTRY_MAX_STRING);
                 se->argv[j] = createObject(OBJ_STRING,s);
-            } else {
+            } else if (argv[j]->refcount == OBJ_SHARED_REFCOUNT) {
                 se->argv[j] = argv[j];
-                incrRefCount(argv[j]);
+            } else {
+                /* Duplicate a string object,
+                 * avoid memory leak for lazyfree. */
+                se->argv[j] = dupStringObject(argv[j]);
             }
         }
     }