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dl() modules are MODULE_TEMPORARY. Their function records are freed at request shutdown, but zend_flf_functions keeps those pointers for the process lifetime. A later request can match the stale handler address and use the freed record. Temporary modules leave the frameless info unset, so the call uses the ordinary internal path.
The 32-bit CI job exited 1 with no child output. Probe setarch -R and skip when that personality cannot be set.
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Promoted to php#24008. |
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dl() registers a module as MODULE_TEMPORARY, but zend_register_functions still stored its frameless handlers in the process-global tables. Request shutdown frees those function records, and a later request that maps the extension at the same address dispatches through the freed record. Temporary modules now leave the frameless info unset, so the call uses the ordinary internal path. Persistent modules still receive frameless info.