From b082876c9b06d8a883726e6ddec50c2b49b6c4da Mon Sep 17 00:00:00 2001
From: greed-island <62747314+greed-island@users.noreply.github.com>
Date: Fri, 27 Mar 2020 18:57:29 +0800
Subject: [PATCH] Update mem.c

rt_realloc may cause <lfree> change, if we don't change <lfree> timely, it may cause memory leakage
---
 src/mem.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/mem.c b/src/mem.c
index 8099b6bb7e..c03c8b3452 100644
--- a/src/mem.c
+++ b/src/mem.c
@@ -489,6 +489,12 @@ void *rt_realloc(void *rmem, rt_size_t newsize)
         {
             ((struct heap_mem *)&heap_ptr[mem2->next])->prev = ptr2;
         }
+        
+        if (mem2 < lfree)
+        {
+            /* the splited struct is now the lowest */
+            lfree = mem2;
+        }
 
         plug_holes(mem2);