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Posted to commits@nuttx.apache.org by GitBox <gi...@apache.org> on 2021/11/01 12:02:35 UTC

[GitHub] [incubator-nuttx] Ouss4 commented on a change in pull request #4765: mm: fix realloc overwrite memcpy when use a new block

Ouss4 commented on a change in pull request #4765:
URL: https://github.com/apache/incubator-nuttx/pull/4765#discussion_r740159758



##########
File path: mm/mm_heap/mm_realloc.c
##########
@@ -355,7 +355,7 @@ FAR void *mm_realloc(FAR struct mm_heap_s *heap, FAR void *oldmem,
       newmem = (FAR void *)mm_malloc(heap, size);
       if (newmem)
         {
-          memcpy(newmem, oldmem, oldsize);
+          memcpy(newmem, oldmem, oldsize - SIZEOF_MM_ALLOCNODE);

Review comment:
       was the following `free` failing here?




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