Bug #81394 [Fbk->Opn]: Apache faults when using cURL with IMAP enabled

Edit report at https://bugs.php.net/bug.php?id=81394&edit=1 ID: 81394 User updated by: chauncey at mcaskill dot ca Reported by: chauncey at mcaskill dot ca Summary: Apache faults when using cURL with IMAP enabled -Status: Feedback +Status: Open Type: Bug Package: cURL related Operating System: macOS PHP Version: Irrelevant Block user comment: N Private report: N New Comment: Yes, the issue still occurs without XDebug. I normally have the following enabled: ACPu, IMagick, IMAP, Memcache, Redis, and XDebug. I tested HTTPD/PHP with and without each of these extensions (tried when not installed, when installed but disabled, and when enabled) and the fault only occurs when IMAP is enabled. Additional details about the IMAP extension installation: ``` brew deps --tree imap@8.0 shivammathur/extensions/imap@8.0 (installed: 8.0.10) ├── imap-uw (installed: 2007f) │ └── openssl@1.1 (installed: 1.1.1l) ├── openssl@1.1 └── krb5 (installed: 1.19.2) └── openssl@1.1 ``` Previous Comments: ------------------------------------------------------------------------ [2021-08-27 20:07:42] requinix@php.net Does it still happen without XDebug? ------------------------------------------------------------------------ [2021-08-27 19:14:17] chauncey at mcaskill dot ca Description: ------------ While running a PHP script via Apache2: * When the IMAP extension is enabled, calling curl_exec() immediately kills the PHP script. PHP does not log any errors, Apache log's a segmentation fault (see below). If HTTPD is running as root, calling curl_exec() works as expected. If running the script via PHP binary, calling curl_exec() works as expected. * When the IMAP extension is disabled (or not installed), calling curl_exec() works as expected with or without HTTPD running as root. Affects PHP 5.6 → 8.1, Intel and Silicon, Mojave to Big Sur, installed via Homebrew. Using Homebrew's HTTPD. Using Shivam Mathur's PHP and PHP extensions. ``` IMAP c-Client Version: 2007f SSL Support: enabled Kerberos Support: enabled ``` ``` cURL Version: 7.78.0 SSL Version: (SecureTransport) OpenSSL/1.1.1l ZLib Version: 1.2.11 libSSH Version: libssh2/1.9.0 ``` Initial GitHub issue: https://github.com/shivammathur/homebrew-php/issues/454 Related GitHub issue: https://github.com/Homebrew/homebrew-core/issues/80460 Related PHP bug report: https://bugs.php.net/bug.php?id=76507 Test script: --------------- <?php $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, 'https://duckduckgo.com'); curl_exec($ch); curl_close($ch); ?> Via PHP CLI, cURL request works: php test.php Via Apache, the cURL request fails: any browser or curl http://localhost/test.php or wget http://localhost/test.php Expected result: ---------------- The snippet should output the HTML response for the DuckDuckGo home page. Actual result: -------------- Empty response from server. Apache log: ``` [Mon Aug 23 12:16:18.240389 2021] [core:notice] [pid 19198] AH00052: child pid 19371 exit signal Segmentation fault (11) ``` Crash report (summary): ``` Thread 0 Crashed:: Dispatch queue: com.apple.root.utility-qos 0 libdispatch.dylib 0x000000018dfdbe3c dispatch_apply_f + 716 1 libdispatch.dylib 0x000000018dfdbe18 dispatch_apply_f + 680 2 com.apple.CoreFoundation 0x000000018e38f464 __104-[CFPrefsSearchListSource synchronouslySendDaemonMessage:andAgentMessage:andDirectMessage:replyHandler:]_block_invoke.98 + 132 3 com.apple.CoreFoundation 0x000000018e228e78 CFPREFERENCES_IS_WAITING_FOR_SYSTEM_AND_USER_CFPREFSDS + 100 4 com.apple.CoreFoundation 0x000000018e228cb8 -[CFPrefsSearchListSource synchronouslySendDaemonMessage:andAgentMessage:andDirectMessage:replyHandler:] + 232 5 com.apple.CoreFoundation 0x000000018e227468 -[CFPrefsSearchListSource alreadylocked_generationCountFromListOfSources:count:] + 252 6 com.apple.CoreFoundation 0x000000018e227144 -[CFPrefsSearchListSource alreadylocked_getDictionary:] + 468 7 com.apple.CoreFoundation 0x000000018e226cf0 -[CFPrefsSearchListSource alreadylocked_copyValueForKey:] + 176 8 com.apple.CoreFoundation 0x000000018e226c20 -[CFPrefsSource copyValueForKey:] + 60 9 com.apple.CoreFoundation 0x000000018e226bcc __76-[_CFXPreferences copyAppValueForKey:identifier:container:configurationURL:]_block_invoke + 44 10 com.apple.CoreFoundation 0x000000018e21fd98 __108-[_CFXPreferences(SearchListAdditions) withSearchListForIdentifier:container:cloudConfigurationURL:perform:]_block_invoke + 384 11 com.apple.CoreFoundation 0x000000018e38fd3c -[_CFXPreferences withSearchListForIdentifier:container:cloudConfigurationURL:perform:] + 392 12 com.apple.CoreFoundation 0x000000018e21f750 -[_CFXPreferences copyAppValueForKey:identifier:container:configurationURL:] + 168 13 com.apple.CoreFoundation 0x000000018e21f66c _CFPreferencesCopyAppValueWithContainerAndConfiguration + 128 14 com.apple.SystemConfiguration 0x000000018ecd5030 SCDynamicStoreCopyProxiesWithOptions + 180 15 libcurl.4.dylib 0x0000000102302950 Curl_resolv + 296 16 libcurl.4.dylib 0x00000001023302e0 create_conn + 11444 17 libcurl.4.dylib 0x000000010232d58c Curl_connect + 96 18 libcurl.4.dylib 0x0000000102317564 multi_runsingle + 444 19 libcurl.4.dylib 0x00000001023172b4 curl_multi_perform + 152 20 libcurl.4.dylib 0x00000001022f8f18 curl_easy_perform + 280 21 libphp7.so 0x0000000100e7549c zif_curl_exec + 104 22 xdebug.so 0x000000010493271c xdebug_execute_internal + 584 23 libphp7.so 0x00000001011b6bf0 ZEND_DO_FCALL_SPEC_RETVAL_UNUSED_HANDLER + 376 24 libphp7.so 0x000000010117da44 execute_ex + 88 25 xdebug.so 0x0000000104932408 xdebug_execute_ex + 780 26 libphp7.so 0x00000001011b7018 ZEND_DO_FCALL_SPEC_RETVAL_USED_HANDLER + 472 27 libphp7.so 0x000000010117da44 execute_ex + 88 28 xdebug.so 0x0000000104932408 xdebug_execute_ex + 780 29 libphp7.so 0x00000001011b7018 ZEND_DO_FCALL_SPEC_RETVAL_USED_HANDLER + 472 30 libphp7.so 0x000000010117da44 execute_ex + 88 31 xdebug.so 0x0000000104932408 xdebug_execute_ex + 780 32 libphp7.so 0x00000001011b7018 ZEND_DO_FCALL_SPEC_RETVAL_USED_HANDLER + 472 33 libphp7.so 0x000000010117da44 execute_ex + 88 34 xdebug.so 0x0000000104932408 xdebug_execute_ex + 780 35 libphp7.so 0x00000001011b7018 ZEND_DO_FCALL_SPEC_RETVAL_USED_HANDLER + 472 36 libphp7.so 0x000000010117da44 execute_ex + 88 37 xdebug.so 0x0000000104932408 xdebug_execute_ex + 780 38 libphp7.so 0x00000001011b7018 ZEND_DO_FCALL_SPEC_RETVAL_USED_HANDLER + 472 39 libphp7.so 0x000000010117da44 execute_ex + 88 40 xdebug.so 0x0000000104932408 xdebug_execute_ex + 780 41 libphp7.so 0x00000001011b7018 ZEND_DO_FCALL_SPEC_RETVAL_USED_HANDLER + 472 42 libphp7.so 0x000000010117da44 execute_ex + 88 43 xdebug.so 0x0000000104932408 xdebug_execute_ex + 780 44 libphp7.so 0x00000001011b7018 ZEND_DO_FCALL_SPEC_RETVAL_USED_HANDLER + 472 45 libphp7.so 0x000000010117da44 execute_ex + 88 46 xdebug.so 0x0000000104932408 xdebug_execute_ex + 780 47 libphp7.so 0x00000001011b6cac ZEND_DO_FCALL_SPEC_RETVAL_UNUSED_HANDLER + 564 48 libphp7.so 0x000000010117da44 execute_ex + 88 49 xdebug.so 0x0000000104932408 xdebug_execute_ex + 780 50 libphp7.so 0x00000001011b6cac ZEND_DO_FCALL_SPEC_RETVAL_UNUSED_HANDLER + 564 51 libphp7.so 0x000000010117da44 execute_ex + 88 52 xdebug.so 0x0000000104932408 xdebug_execute_ex + 780 53 libphp7.so 0x00000001011b6cac ZEND_DO_FCALL_SPEC_RETVAL_UNUSED_HANDLER + 564 54 libphp7.so 0x000000010117da44 execute_ex + 88 55 xdebug.so 0x0000000104932408 xdebug_execute_ex + 780 56 libphp7.so 0x00000001011bb5e8 ZEND_INCLUDE_OR_EVAL_SPEC_TMPVAR_HANDLER + 624 57 libphp7.so 0x000000010117da44 execute_ex + 88 58 xdebug.so 0x0000000104932408 xdebug_execute_ex + 780 59 libphp7.so 0x00000001011bb5e8 ZEND_INCLUDE_OR_EVAL_SPEC_TMPVAR_HANDLER + 624 60 libphp7.so 0x000000010117da44 execute_ex + 88 61 xdebug.so 0x0000000104932408 xdebug_execute_ex + 780 62 libphp7.so 0x00000001011bb300 ZEND_INCLUDE_OR_EVAL_SPEC_CONST_HANDLER + 584 63 libphp7.so 0x000000010117da44 execute_ex + 88 64 xdebug.so 0x0000000104932408 xdebug_execute_ex + 780 65 libphp7.so 0x00000001011bb300 ZEND_INCLUDE_OR_EVAL_SPEC_CONST_HANDLER + 584 66 libphp7.so 0x000000010117da44 execute_ex + 88 67 xdebug.so 0x0000000104932408 xdebug_execute_ex + 780 68 libphp7.so 0x000000010117db88 zend_execute + 272 69 libphp7.so 0x00000001011417a0 zend_execute_scripts + 152 70 libphp7.so 0x00000001010ee330 php_execute_script + 532 71 libphp7.so 0x00000001011fc6c0 php_handler + 916 72 httpd 0x0000000100682e70 ap_run_handler + 64 73 httpd 0x0000000100683558 ap_invoke_handler + 268 74 httpd 0x00000001006b98d0 ap_internal_redirect + 60 75 mod_rewrite.so 0x0000000100e03bc0 handler_redirect + 136 76 httpd 0x0000000100682e70 ap_run_handler + 64 77 httpd 0x0000000100683558 ap_invoke_handler + 268 78 httpd 0x00000001006b948c ap_process_async_request + 792 79 httpd 0x00000001006b953c ap_process_request + 24 80 httpd 0x00000001006b63d4 ap_process_http_connection + 344 81 httpd 0x0000000100693e6c ap_run_process_connection + 64 82 mod_mpm_prefork.so 0x0000000100886530 child_main + 1032 83 mod_mpm_prefork.so 0x0000000100885ff4 make_child + 432 84 mod_mpm_prefork.so 0x0000000100885a58 prefork_run + 2056 85 httpd 0x00000001006964e8 ap_run_mpm + 84 86 httpd 0x0000000100689ea4 main + 1924 87 libdyld.dylib 0x000000018e195430 start + 4 ``` ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=81394&edit=1