[incubator-nuttx] branch master updated: mm: fix realloc overwrite memcpy when use a new block

[xi...@apache.org]

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xiaoxiang pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git


The following commit(s) were added to refs/heads/master by this push:
     new 3615592  mm: fix realloc overwrite memcpy when use a new block
3615592 is described below

commit 3615592e82a1083dbe8c65ac4154369f0aff473e
Author: ligd <li...@xiaomi.com>
AuthorDate: Tue Oct 26 16:10:39 2021 +0800

    mm: fix realloc overwrite memcpy when use a new block
    
    Signed-off-by: ligd <li...@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 093446e..bfaf2e6 100644
--- a/mm/mm_heap/mm_realloc.c
+++ b/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);
           mm_free(heap, oldmem);
         }