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Fix use-after-free in zend_compile_const_decl() under opcache #25302

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Fix use-after-free in zend_compile_const_decl() under opcache #25302

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7 changes: 5 additions & 2 deletions Zend/zend_compile.c
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Original file line number Diff line number Diff line change
Expand Up @@ -9483,12 +9483,15 @@ static void zend_compile_const_decl(zend_ast *ast) /* {{{ */
}
}

/* Register before the literal takes the name: interning it there may
* release it, when opcache has put the same string in shared memory
* since the call above. */
zend_register_seen_symbol(name, ZEND_SYMBOL_CONST);

name_node.op_type = IS_CONST;
ZVAL_STR(&name_node.u.constant, name);

zend_emit_op(NULL, ZEND_DECLARE_CONST, &name_node, &value_node);

zend_register_seen_symbol(name, ZEND_SYMBOL_CONST);
}
}
/* }}}*/
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