Property attributes of internal classes are never freed.

[ju1ius]

Description

In zend_opcode.c, the prop_info->attributes hashtable is not released for internal classes.

Here's an excerpt of the current code (comments added):

ZEND_HASH_MAP_FOREACH_PTR(&ce->properties_info, prop_info) {
  if (prop_info->ce == ce) {
    zend_string_release(prop_info->name);
    zend_type_release(prop_info->type, /* persistent */ 1);
    // ----------
    // Notice the missing if(prop_info->attributes) zend_hash_release(prop_info->attributes);
    // ----------
    free(prop_info);
  }
} ZEND_HASH_FOREACH_END();

Excerpt of the memcheck report:

==1815282== 32 bytes in 1 blocks are indirectly lost in loss record 1 of 2
==1815282==    at 0x48407B4: malloc (vg_replace_malloc.c:381)
==1815282==    by 0x758E63: __zend_malloc (zend_alloc.c:3116)
==1815282==    by 0x7CE6E6: zend_add_attribute (zend_attributes.c:284)
==1815282==    by 0x7862B61: zend_add_property_attribute (zend_attributes.h:112)

PHP Version

PHP 8.3-dev

Operating System

irrelevant