More poisoning

Author: danog

Zend/zend_alloc.c

@@ -1659,6 +1659,8 @@ static zend_never_inline void *zend_mm_realloc_huge(zend_mm_heap *heap, void *pt
 #else
 			zend_mm_change_huge_block_size(heap, ptr, new_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
 #endif
+			ZEND_ASAN_POISON_MEMORY_REGION(ptr, new_size);
+			ZEND_ASAN_UNPOISON_MEMORY_REGION(ptr, size);
 			return ptr;
 		} else if (new_size < old_size) {
 			/* unmup tail */
@@ -1674,6 +1676,8 @@ static zend_never_inline void *zend_mm_realloc_huge(zend_mm_heap *heap, void *pt
 #else
 				zend_mm_change_huge_block_size(heap, ptr, new_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
 #endif
+				ZEND_ASAN_POISON_MEMORY_REGION(ptr, old_size);
+				ZEND_ASAN_UNPOISON_MEMORY_REGION(ptr, size);
 				return ptr;
 			}
 		} else /* if (new_size > old_size) */ {
@@ -1706,6 +1710,9 @@ static zend_never_inline void *zend_mm_realloc_huge(zend_mm_heap *heap, void *pt
 #else
 				zend_mm_change_huge_block_size(heap, ptr, new_size ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_ORIG_RELAY_CC);
 #endif
+				ZEND_ASAN_POISON_MEMORY_REGION(ptr, new_size);
+				ZEND_ASAN_UNPOISON_MEMORY_REGION(ptr, size);
+
 				return ptr;
 			}
 		}