Fix

danog · danog · commit 246b27583374 · 2025-07-23T12:28:39.000+02:00
diff --git a/Zend/zend_alloc.c b/Zend/zend_alloc.c
@@ -1999,6 +1999,7 @@ static zend_always_inline void *zend_mm_realloc_heap(zend_mm_heap *heap, void *p
 					} else {
 						/* reallocation in-place */
 						ret = ptr;
+						ZEND_MM_POISON(ret, old_size)
 						ZEND_MM_UNPOISON(ret, size);
 					}
 				} else if (size <= ZEND_MM_MAX_SMALL_SIZE) {

Original file line number	Diff line number	Diff line change
`@@ -1999,6 +1999,7 @@ static zend_always_inline void zend_mm_realloc_heap(zend_mm_heap heap, void *p`
`1999`	`1999`	`} else {`
`2000`	`2000`	`/* reallocation in-place */`
`2001`	`2001`	`ret = ptr;`
	`2002`	`+ ZEND_MM_POISON(ret, old_size)`
`2002`	`2003`	`ZEND_MM_UNPOISON(ret, size);`
`2003`	`2004`	`}`
`2004`	`2005`	`} else if (size <= ZEND_MM_MAX_SMALL_SIZE) {`