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When a CURLMOPT_PUSHFUNCTION callback keeps the pushed CurlHandle and denies the push, libcurl frees the easy handle and the wrapper is left with ch->cp set to NULL. curl_easy_reset() and curl_easy_duphandle() do not accept a NULL handle, so curl_reset(), curl_copy_handle() and clone on the kept handle crash. Skip the libcurl reset and take the existing duplication failure exits when there is no easy handle.
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Submitted upstream as php#24323. |
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Follow-up to php#23850, stacked on its branch. When a CURLMOPT_PUSHFUNCTION callback keeps the pushed handle and denies the push, libcurl frees the easy handle and the CurlHandle is left with a NULL ch->cp. curl_reset(), curl_copy_handle() and clone pass that NULL to curl_easy_reset() and curl_easy_duphandle() and segfault. This predates php#23850 (reproduced on 5714009); the other CurlHandle entry points already fail cleanly without an easy handle.
The test depends on the dtor change in php#23850: without it the kept handle's handlers leak and a debug build reports it.
Not included: curl_getinfo() with CURLINFO_CERTINFO leaks the array it initialised when curl_easy_getinfo() fails, reachable through the same kept handle. That is a separate fix.