From 045b9ffd5480aa2e72ffa1c7e6464cf90acf3ff0 Mon Sep 17 00:00:00 2001
From: anjiahao <anjiahao@xiaomi.com>
Date: Fri, 19 May 2023 19:28:14 +0800
Subject: [PATCH] mempool:fix bug read out of bounds when realloc

fix kasan report

Signed-off-by: anjiahao <anjiahao@xiaomi.com>
---
 mm/mm_heap/mm_realloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/mm_heap/mm_realloc.c b/mm/mm_heap/mm_realloc.c
index 859ab692dbc..0fab7c3b071 100644
--- a/mm/mm_heap/mm_realloc.c
+++ b/mm/mm_heap/mm_realloc.c
@@ -93,7 +93,7 @@ FAR void *mm_realloc(FAR struct mm_heap_s *heap, FAR void *oldmem,
       newmem = mm_malloc(heap, size);
       if (newmem != NULL)
         {
-          memcpy(newmem, oldmem, size);
+          memcpy(newmem, oldmem, MIN(size, mm_malloc_size(heap, oldmem)));
           mm_free(heap, oldmem);
         }