Guard var_dump()/debug_zval_dump() against native stack overflow - #190
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Guard var_dump()/debug_zval_dump() against native stack overflow#190iliaal wants to merge 1 commit into
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php_object_property_dump() and serialize() already check ZEND_CHECK_STACK_LIMIT before recursing, but php_array_element_dump() and both debug_zval_dump() element helpers do not, so a deeply nested array or object crashes the process instead of printing "nesting level too deep". Add the same guard to those three helpers. var_export() overflows the same way but needs a throw-based guard, left for a separate change.
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Promoted upstream: php#22871 |
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A deeply nested array or object passed to var_dump() or debug_zval_dump() overflows the native C stack and segfaults. The object path of var_dump() and serialize() already guard their recursion with ZEND_CHECK_STACK_LIMIT and degrade to "nesting level too deep" or a controlled Error; the array element helper and both debug_zval_dump() helpers were missing the check. This adds it to the three unguarded helpers. var_export() overflows the same way but emits PHP code, so it needs a throw rather than an inline notice, left for a separate change.