Bug #81394 [NEW]: Apache faults when using cURL with IMAP enabled

From: chauncey at mcaskill dot ca Operating system: macOS PHP version: Irrelevant Package: cURL related Bug Type: Bug Bug description:Apache faults when using cURL with IMAP enabled 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 bug report at https://bugs.php.net/bug.php?id=81394&edit=1 -- Fix committed: https://bugs.php.net/fix.php?id=81394&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=81394&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=81394&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=81394&r=needscript Try newer version: https://bugs.php.net/fix.php?id=81394&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=81394&r=support Expected behavior: https://bugs.php.net/fix.php?id=81394&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=81394&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=81394&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=81394&r=globals PHP version support discontinued: https://bugs.php.net/fix.php?id=81394&r=phptooold Daylight Savings: https://bugs.php.net/fix.php?id=81394&r=dst IIS Stability: https://bugs.php.net/fix.php?id=81394&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=81394&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=81394&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=81394&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=81394&r=mysqlcfg