From c010f378caa66e18145d94e35a7123e9209f46d1 Mon Sep 17 00:00:00 2001
From: Giovanni Di Sirio <gdisirio@gmail.com>
Date: Mon, 20 Nov 2017 18:28:56 +0000
Subject: Fixed bug #804.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@11046 35acf78f-673a-0410-8e92-d51de3d6d3f4
---
 os/common/oslib/include/chheap.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'os/common/oslib/include/chheap.h')

diff --git a/os/common/oslib/include/chheap.h b/os/common/oslib/include/chheap.h
index 7c85efe7f..6cce85b3c 100644
--- a/os/common/oslib/include/chheap.h
+++ b/os/common/oslib/include/chheap.h
@@ -173,7 +173,7 @@ static inline void *chHeapAlloc(memory_heap_t *heapp, size_t size) {
  */
 static inline size_t chHeapGetSize(const void *p) {
 
-  return ((heap_header_t *)p)->used.size;
+  return ((heap_header_t *)p - 1U)->used.size;
 }
 
 #endif /* CH_CFG_USE_HEAP == TRUE */
-- 
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