Working in php-pecl-event extension, which uses libevent and openssl openssl-devel-1.1.0e-1.fc26.x86_64 libevent-devel-2.0.22-1.fc25.x86_64 php-devel-7.1.3-1.fc26.x86_64 $ gdb php (gdb) run -n -d "output_handler=" -d "open_basedir=" -d "disable_functions=" -d "output_buffering=Off" -d "error_reporting=32767" -d "display_errors=1" -d "display_startup_errors=1" -d "log_errors=0" -d "html_errors=0" -d "track_errors=1" -d "report_memleaks=1" -d "report_zend_debug=0" -d "docref_root=" -d "docref_ext=.html" -d "error_prepend_string=" -d "error_append_string=" -d "auto_prepend_file=" -d "auto_append_file=" -d "ignore_repeated_errors=0" -d "precision=14" -d "memory_limit=128M" -d "log_errors_max_len=0" -d "opcache.fast_shutdown=0" -d "opcache.file_update_protection=0" -d "extension=sockets.so" -d "extension=/home/remi/pecl-event/modules/event.so" -d "session.auto_start=0" -d "zlib.output_compression=Off" -f "/home/remi/pecl-event/tests/21-bevent-sslfilter.php" (gdb) bt #0 0x00007fffebfb2d61 in EVP_CIPHER_CTX_cleanup () from /lib64/libcrypto.so.10 #1 0x00007fffec32ca5d in ssl_clear_cipher_ctx () from /lib64/libssl.so.10 #2 0x00007fffec32e23a in SSL_set_accept_state () from /lib64/libssl.so.10 #3 0x00007fffec9a4ea2 in bufferevent_openssl_new_impl (base=0x555555cf6380, underlying=0x555555cd6750, fd=fd@entry=-1, ssl=0x555555ced850, state=BUFFEREVENT_SSL_ACCEPTING, options=<optimized out>) at bufferevent_openssl.c:1337 #4 0x00007fffec9a5b8e in bufferevent_openssl_filter_new (base=<optimized out>, underlying=<optimized out>, ssl=<optimized out>, state=<optimized out>, options=<optimized out>) at bufferevent_openssl.c:1396 #5 0x00007fffecbbe9ce in _create_ssl_filter (execute_data=<optimized out>, return_value=0x7fffffffa210, deprecated=<optimized out>) at /home/remi/pecl-event/php7/classes/buffer_event.c:308 #6 0x0000555555853e80 in ZEND_DO_FCALL_SPEC_RETVAL_UNUSED_HANDLER () at /usr/src/debug/php-7.1.3/Zend/zend_vm_execute.h:970 #7 0x00005555557fb14b in execute_ex (ex=<optimized out>) at /usr/src/debug/php-7.1.3/Zend/zend_vm_execute.h:429 #8 0x0000555555855ec0 in zend_execute (op_array=op_array@entry=0x555555cf5e40, return_value=return_value@entry=0x555555cf6310) at /usr/src/debug/php-7.1.3/Zend/zend_vm_execute.h:474 #9 0x00005555557b1972 in zend_execute_scripts (type=type@entry=8, retval=0x555555cf6310, retval@entry=0x0, file_count=-134995904, file_count@entry=3) at /usr/src/debug/php-7.1.3/Zend/zend.c:1476 #10 0x000055555574e670 in php_execute_script (primary_file=0x7fffffffc830) at /usr/src/debug/php-7.1.3/main/main.c:2537 #11 0x00005555558581f8 in do_cli (argc=60, argv=0x555555bd1db0) at /usr/src/debug/php-7.1.3/sapi/cli/php_cli.c:993 #12 0x0000555555621558 in main (argc=60, argv=0x555555bd1db0) at /usr/src/debug/php-7.1.3/sapi/cli/php_cli.c:1381 Using valgrind (ensuring we are not using PHP allocator) $ export USE_ZEND_ALLOC=0 $ valgrind /usr/bin/php -n -d "output_handler=" -d "open_basedir=" -d "disable_functions=" -d "output_buffering=Off" -d "error_reporting=32767" -d "display_errors=1" -d "display_startup_errors=1" -d "log_errors=0" -d "html_errors=0" -d "track_errors=1" -d "report_memleaks=1" -d "report_zend_debug=0" -d "docref_root=" -d "docref_ext=.html" -d "error_prepend_string=" -d "error_append_string=" -d "auto_prepend_file=" -d "auto_append_file=" -d "ignore_repeated_errors=0" -d "precision=14" -d "memory_limit=128M" -d "log_errors_max_len=0" -d "opcache.fast_shutdown=0" -d "opcache.file_update_protection=0" -d "extension=sockets.so" -d "extension=/home/remi/pecl-event/modules/event.so" -d "session.auto_start=0" -d "zlib.output_compression=Off" -f "/home/remi/pecl-event/tests/21-bevent-sslfilter.php" ==20455== Memcheck, a memory error detector ==20455== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al. ==20455== Using Valgrind-3.12.0 and LibVEX; rerun with -h for copyright info ==20455== Command: /usr/bin/php -n -d output_handler= -d open_basedir= -d disable_functions= -d output_buffering=Off -d error_reporting=32767 -d display_errors=1 -d display_startup_errors=1 -d log_errors=0 -d html_errors=0 -d track_errors=1 -d report_memleaks=1 -d report_zend_debug=0 -d docref_root= -d docref_ext=.html -d error_prepend_string= -d error_append_string= -d auto_prepend_file= -d auto_append_file= -d ignore_repeated_errors=0 -d precision=14 -d memory_limit=128M -d log_errors_max_len=0 -d opcache.fast_shutdown=0 -d opcache.file_update_protection=0 -d extension=sockets.so -d extension=/home/remi/pecl-event/modules/event.so -d session.auto_start=0 -d zlib.output_compression=Off -f /home/remi/pecl-event/tests/21-bevent-sslfilter.php ==20455== ==20455== Invalid read of size 8 ==20455== at 0x10E50D61: EVP_CIPHER_CTX_cleanup (in /usr/lib64/libcrypto.so.1.0.2j) ==20455== by 0x10AFDA5C: ssl_clear_cipher_ctx (in /usr/lib64/libssl.so.1.0.2j) ==20455== by 0x10AFF239: SSL_set_accept_state (in /usr/lib64/libssl.so.1.0.2j) ==20455== by 0x1046BEA1: bufferevent_openssl_new_impl (bufferevent_openssl.c:1337) ==20455== by 0x102539CD: _create_ssl_filter (buffer_event.c:308) ==20455== by 0x407E7F: ZEND_DO_FCALL_SPEC_RETVAL_UNUSED_HANDLER (zend_vm_execute.h:970) ==20455== by 0x3AF14A: execute_ex (zend_vm_execute.h:429) ==20455== by 0x409EBF: zend_execute (zend_vm_execute.h:474) ==20455== by 0x365971: zend_execute_scripts (zend.c:1476) ==20455== by 0x30266F: php_execute_script (main.c:2537) ==20455== by 0x40C1F7: do_cli (php_cli.c:993) ==20455== by 0x1D5557: main (php_cli.c:1381) ==20455== Address 0xffffffff00000000 is not stack'd, malloc'd or (recently) free'd ==20455== I'm not sure where the bug is (php-pecl-event, libevent or openssl), but this only happen with OpenSSL 1.1, everything works as expected with OpenSSL 1.0. Any help welcome on this issue.
BTW, just noticed libevent is FTBFS in rawhide... so still use older openssl library... see #1423849
This is most probably a conflict between the old and new openssl being simultaneously used in a single process. In most cases this works fine, but there might be use-cases where it does not. I'll look at patching libevent to use the 1.1.0.
Notice: from a quick test - latest libevent 2.1.8 just build fine in F26 (but introduce a soname bump from 5 to 6) - the pecl/event test suite passes without any segfault > This is most probably a conflict between the old and new openssl being simultaneously used in a single process. Indeed.
php-pecl-event rebuild in rawhide, "full" test suite passes without any segfault. Thanks for the quick fix.
libevent-2.0.22-3.fc26 has been pushed to the Fedora 26 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2017-f1d16808df
Of course at least in Rawhide it would be much better if libevent was updated to current upstream version. But I suppose doing soname bump in F26 branch is not a good idea.
(In reply to Tomas Mraz from comment #6) > Of course at least in Rawhide it would be much better if libevent was > updated to current upstream version. But I suppose doing soname bump in F26 > branch is not a good idea. +1
libevent-2.0.22-3.fc26 has been pushed to the Fedora 26 stable repository. If problems still persist, please make note of it in this bug report.