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[2012-02-14 17:33 UTC] pada at hrz dot tu-chemnitz dot de
[2012-05-25 20:46 UTC] alexkress at rogers dot com
[2013-02-05 15:23 UTC] rene dot kerner at trivago dot com
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Last updated: Sun Jan 24 19:01:22 2021 UTC |
Description: ------------ We are experiencing segmentation faults on an internal website. An object oriented framework fetches objects (containing several arrays and pointers) from a database, and writes them to memcache. Memcache client will segfault while accessing Z_TYPE_P(result[0]). Everytime, we end up in the following code of memcache.c: /usr/src/debug/php-pecl-memcache-3.0.5/memcache-3.0.5/memcache.c:1509 1509 if (Z_TYPE_P(result[0]) != IS_ARRAY) { Any hints what could be the origin for these SegFaults or how one can reproduce this behaviour? OS: CentOS Linux 6.0 x86_64 PHP: 5.3.3 PECL Memcache: 3.0.5 (affected) PECL Memcache: 3.0.6 (affected) Configure Line: './configure' '--build=x86_64-koji-linux-gnu' '--host=x86_64- koji-linux-gnu' '--target=x86_64-redhat-linux-gnu' '--program-prefix=' '-- prefix=/usr' '--exec-prefix=/usr' '--bindir=/usr/bin' '--sbindir=/usr/sbin' '-- sysconfdir=/etc' '--datadir=/usr/share' '--includedir=/usr/include' '-- libdir=/usr/lib64' '--libexecdir=/usr/libexec' '--localstatedir=/var' '-- sharedstatedir=/var/lib' '--mandir=/usr/share/man' '--infodir=/usr/share/info' '--cache-file=../config.cache' '--with-libdir=lib64' '--with-config-file- path=/etc' '--with-config-file-scan-dir=/etc/php.d' '--disable-debug' '--with- pic' '--disable-rpath' '--without-pear' '--with-bz2' '--with-exec-dir=/usr/bin' '--with-freetype-dir=/usr' '--with-png-dir=/usr' '--with-xpm-dir=/usr' '-- enable-gd-native-ttf' '--without-gdbm' '--with-gettext' '--with-gmp' '--with- iconv' '--with-jpeg-dir=/usr' '--with-openssl' '--with-pcre-regex=/usr' '--with- zlib' '--with-layout=GNU' '--enable-exif' '--enable-ftp' '--enable-magic-quotes' '--enable-sockets' '--enable-sysvsem' '--enable-sysvshm' '--enable-sysvmsg' '-- with-kerberos' '--enable-ucd-snmp-hack' '--enable-shmop' '--enable-calendar' '-- without-sqlite' '--with-libxml-dir=/usr' '--enable-xml' '--with-system-tzdata' '--enable-force-cgi-redirect' '--enable-pcntl' '--with-imap=shared' '--with- imap-ssl' '--enable-mbstring=shared' '--enable-mbregex' '--with-gd=shared' '-- enable-bcmath=shared' '--enable-dba=shared' '--with-db4=/usr' '--with- xmlrpc=shared' '--with-ldap=shared' '--with-ldap-sasl' '--with- mysql=shared,/usr' '--with-mysqli=shared,/usr/lib64/mysql/mysql_config' '-- enable-dom=shared' '--with-pgsql=shared' '--enable-wddx=shared' '--with- snmp=shared,/usr' '--enable-soap=shared' '--with-xsl=shared,/usr' '--enable- xmlreader=shared' '--enable-xmlwriter=shared' '--with-curl=shared,/usr' '-- enable-fastcgi' '--enable-pdo=shared' '--with-pdo-odbc=shared,unixODBC,/usr' '-- with-pdo-mysql=shared,/usr/lib64/mysql/mysql_config' '--with-pdo- pgsql=shared,/usr' '--with-pdo-sqlite=shared,/usr' '--with-sqlite3=shared,/usr' '--enable-json=shared' '--enable-zip=shared' '--without-readline' '--with- libedit' '--with-pspell=shared' '--enable-phar=shared' '--with-tidy=shared,/usr' '--enable-sysvmsg=shared' '--enable-sysvshm=shared' '--enable-sysvsem=shared' '- -enable-posix=shared' '--with-unixODBC=shared,/usr' '--enable-fileinfo=shared' '--enable-intl=shared' '--with-icu-dir=/usr' '--with-enchant=shared,/usr' '-- with-recode=shared,/usr' Test script: --------------- No test script yet, but reproducible with a non-public website. Please ask if you need more information. Expected result: ---------------- No segmentation fault Actual result: -------------- core file: core.httpd.14261 zend stack backtrace: [New Thread 14261] [New Thread 11400] [Thread debugging using libthread_db enabled] Core was generated by `/usr/sbin/httpd'. Program terminated with signal 11, Segmentation fault. #0 0x00007f344e7c5ad2 in mmc_value_handler_multi (key=0x7fffa42d6c80 "EXP4_MC_20120213162906:1f8b7944ec23744ccf2f0259c5d4ba662e3d4083", key_len=63, value=0x7fffa42d6c30, flags=1, cas=0, param=<value optimized out>) at /usr/src/debug/php-pecl-memcache-3.0.5/memcache-3.0.5/memcache.c:1509 1509 if (Z_TYPE_P(result[0]) != IS_ARRAY) { [0x7f345f85a2e0] set("EXP4_MC_20120213162906:1f8b7944ec23744ccf2f0259c5d4ba662e3d4083", object[0x7f345f6e3f38], 0, 3600) /var/www/plugins/comDBPlugin/lib/comMemcache.class.php:358 [0x7f345f85a0d8] set("tag:1:707", object[0x7f345f6e3f38], 3600) /var/www/plugins/comDBPlugin/lib/comPeer.class.php:448 [0x7f345f859598] storeInMemcache(object[0x7f345f6e3f38]) /var/www/plugins/comDBPlugin/lib/comObject.class.php:212 [0x7f345f858650] hydrate(707, array(0)[0x7f345f721270], array(0) [0x7f345f7214f0], array(13)[0x7f345f7397a0]) /var/www/plugins/comDBPlugin/lib/comObject.class.php:127 [0x7f345f8580a0] __construct("707") /var/www/plugins/areaBasePlugin/lib/model/tag.class.php:58 [0x7f345f8576b8] __construct("707") /var/www/plugins/comDBPlugin/lib/comPeer.class.php:214 [0x7f345f857340] ids2objectsWithIds(array(17)[0x7f345f6e0c90]) /var/www/plugins/comDBPlugin/lib/comPeer.class.php:174 [0x7f345f856f90] ids2objects(array(17)[0x7f345f6e0c90]) /var/www/plugins/areaBasePlugin/lib/model/comBaseAsset.class.php:1254 [0x7f345f856c90] getTags(37) /var/www/plugins/areaBasePlugin/lib/model/comBaseAsset.class.php:1286 [0x7f345f856ae8] getTagsString(37) /var/www/plugins/areaBasePlugin/lib/model/contentAsset.class.php:1555 [0x7f345f855f88] getMetaKeywords() /var/www/plugins/areaBasePlugin/modules/progContent/lib/comprogContentActions.cl ass.php:128 [0x7f345f854c70] setupMetaForContent(object[0x7f345f6b8208]) /var/www/plugins/areaBasePlugin/modules/progContent/actions/actions.class.php:13 26 [0x7f345f853f00] renderContent() /var/www/plugins/areaBasePlugin/modules/progContent/actions/actions.class.php:23 9 [0x7f345f853838] executeView(object[0x7f345f6d0750]) /var/www/cache/sf/abc/prod/config/config_core_compile.yml.php:459 [0x7f345f853568] execute(object[0x7f345f6d0750]) /var/www/cache/sf/abc/prod/config/config_core_compile.yml.php:952 [0x7f345f853210] executeAction(object[0x7f345f925090]) /var/www/cache/sf/abc/prod/config/config_core_compile.yml.php:947 [0x7f345f852ab8] handleAction(object[0x7f345fce7858], object[0x7f345f925090]) /var/www/cache/sf/abc/prod/config/config_core_compile.yml.php:933 [0x7f345f8525a0] execute(object[0x7f345fce7858]) /var/www/cache/sf/abc/prod/config/config_core_compile.yml.php:1031 [0x7f345f851f38] execute() /var/www/lib/vendor/symfony/lib/filter/sfCommonFilter.class.php:29 [0x7f345f851a20] execute(object[0x7f345fce7858]) /var/www/cache/sf/abc/prod/config/config_core_compile.yml.php:1031 [0x7f345f8510e8] execute() /var/www/plugins/comDBPlugin/lib/filter/comIPFilter.class.php:109 [0x7f345f850bd0] execute(object[0x7f345fce7858]) /var/www/cache/sf/abc/prod/config/config_core_compile.yml.php:1031 [0x7f345f850818] execute() /var/www/cache/sf/abc/prod/config/config_core_compile.yml.php:995 [0x7f345f850300] execute(object[0x7f345fce7858]) /var/www/cache/sf/abc/prod/config/config_core_compile.yml.php:1031 [0x7f345f84ee40] execute() /var/www/cache/sf/abc/prod/config/config_core_compile.yml.php:665 [0x7f345f84e040] forward("progContent", "view") /var/www/plugins/areaBasePlugin/lib/controller/areaWebController.php:62 [0x7f345f84df00] dispatch() /var/www/lib/vendor/symfony/lib/util/sfContext.class.php:170 [0x7f345f84da70] dispatch() /var/www/htdocs/index.php:21 full backtrace: [New Thread 14261] [New Thread 11400] [Thread debugging using libthread_db enabled] Core was generated by `/usr/sbin/httpd'. Program terminated with signal 11, Segmentation fault. #0 0x00007f344e7c5ad2 in mmc_value_handler_multi (key=0x7fffa42d6c80 "EXP4_MC_20120213162906:1f8b7944ec23744ccf2f0259c5d4ba662e3d4083", key_len=63, value=0x7fffa42d6c30, flags=1, cas=0, param=<value optimized out>) at /usr/src/debug/php-pecl-memcache-3.0.5/memcache-3.0.5/memcache.c:1509 1509 if (Z_TYPE_P(result[0]) != IS_ARRAY) { #0 0x00007f344e7c5ad2 in mmc_value_handler_multi (key=0x7fffa42d6c80 "EXP4_MC_20120213162906:1f8b7944ec23744ccf2f0259c5d4ba662e3d4083", key_len=63, value=0x7fffa42d6c30, flags=1, cas=0, param=<value optimized out>) at /usr/src/debug/php-pecl-memcache-3.0.5/memcache-3.0.5/memcache.c:1509 arrval = 0x7f345f7216a0 result = 0x7fffa42d6f00 #1 0x00007f344e7c9588 in mmc_unpack_value (mmc=<value optimized out>, request=0x7f345f5fa7a0, buffer=0x7f345f5fa7c8, key=0x7f345f5fa958 "EXP4_MC_20120213162906:1f8b7944ec23744ccf2f0259c5d4ba662e3d4083", key_len=63, flags=1, cas=0, bytes=787) at /usr/src/debug/php-pecl-memcache-3.0.5/memcache- 3.0.5/memcache_pool.c:490 var_hash = {first = 0x7f345f73b658, first_dtor = 0x7f345f73d6e8} key_tmp = "EXP4_MC_20120213162906:1f8b7944ec23744ccf2f0259c5d4ba662e3d4083\000\000\000\000 \000\000\000\000\000\377\017\000\000\000\000\000\000xu2_4\177\000\000\240\247__4 \177\000\000\320\020\225_4\177\000\000\001", '\000' <repeats 15 times>, "8\260\264\\4\177\000\000\020\000\000\000\060\000\000\000\340m- \244\377\177\000\000 m- \244\377\177\000\000\000\020\000\000\000\000\000\000(\021\225_4\177\000\000\000\ 000\000\000\000\000\000\000X\251__4\177\000\000T\252__4\177\000\000X\252__4\177\ 000\000`\252__4\177\000\000M\000\000\000\000\000\000\000(\021\225_4\177\000\000\ 000\000\000\000\000\000\000\000\270"... buffer_tmp = {value = {c = 0x7f345f67afe8 "O:3:\"tag\":10:{s:21:\"", len = 0, a = 3181}, idx = 0} p = 0x7f345f67b2fb "\r\ng\";}\r\n3:\"int\";}s:8:\"vote_cnt\";a:1: {s:1:\"t\";s:3:\"int\";}s:13:\"favourite_cnt\";a:1: {s:1:\"t\";s:3:\"int\";}s:8:\"view_cnt\";a:2: {s:1:\"t\";s:3:\"int\";s:1:\"n\";i:1;}s:13:\"navigation_id\";a:1: {s:1:\"t\";s:3:\"int\";}s:1"... object = 0x7fffa42d6c30 value_handler = 0x7f344e7c5a70 <mmc_value_handler_multi> value_handler_param = 0x7fffa42d6f00 data = 0x7f345f67afe8 "O:3:\"tag\":10:{s:21:\"" data_len = 787 value = {value = {lval = 299, dval = 1.4772562810653272e-321, str = {val = 0x12b <Address 0x12b out of bounds>, len = 1417720512}, ht = 0x12b, obj = {handle = 299, handlers = 0x7f345480b2c0}}, refcount__gc = 1, type = 5 '\005', is_ref__gc = 0 '\000'} #2 0x00007f344e7ce117 in mmc_server_read_value (mmc=0x7f345f9510d0, request=0x7f345f5fa7a0) at /usr/src/debug/php-pecl-memcache-3.0.5/memcache- 3.0.5/memcache_ascii_protocol.c:187 result = <value optimized out> req = 0x7f345f5fa7a0 #3 0x00007f344e7cb16b in mmc_pool_select (pool=0x7f345f5ee0c8) at /usr/src/debug/php-pecl-memcache-3.0.5/memcache-3.0.5/memcache_pool.c:1584 i = <value optimized out> result = <value optimized out> mmc = 0x7f345f9510d0 sending = <value optimized out> reading = <value optimized out> #4 0x00007f344e7cb8d8 in mmc_pool_run (pool=0x7f345f5ee0c8) at /usr/src/debug/php-pecl-memcache-3.0.5/memcache-3.0.5/memcache_pool.c:1670 mmc = <value optimized out> #5 0x00007f344e7c5d32 in php_mmc_store (ht=<value optimized out>, return_value=0x7f345f721720, return_value_ptr=<value optimized out>, this_ptr= <value optimized out>, return_value_used=<value optimized out>, op=1) at /usr/src/debug/php-pecl-memcache-3.0.5/memcache-3.0.5/memcache.c:520 pool = 0x7f345f5ee0c8 request = <value optimized out> keys = 0x7f345f721820 value = 0x7f345f6e3f38 mmc_object = 0x7f345f5f2700 flags = 0 exptime = 3600 cas = 0 #6 0x00007f34544eda58 in zend_do_fcall_common_helper_SPEC (execute_data=<value optimized out>) at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:316 opline = <value optimized out> should_change_scope = 1 '\001' #7 0x00007f34544c4d80 in execute (op_array=0x7f345f5f3320) at /usr/src/debug/php-5.3.3/Zend/zend_vm_execute.h:107 ret = <value optimized out> execute_data = 0x7f345f85a2e0 nested = 1 '\001' original_in_execution = 0 '\000' #8 0x00007f345449f47d in zend_execute_scripts (type=8, retval=0x0, file_count=3) at /usr/src/debug/php-5.3.3/Zend/zend.c:1194 files = {{gp_offset = 40, fp_offset = 32767, overflow_arg_area = 0x7fffa42d71c0, reg_save_area = 0x7fffa42d7150}} i = <value optimized out> file_handle = 0x7fffa42d94e0 orig_op_array = 0x0 orig_retval_ptr_ptr = 0x0 #9 0x00007f345444d748 in php_execute_script (primary_file=0x7fffa42d94e0) at /usr/src/debug/php-5.3.3/main/main.c:2260 realfile = "\377\377\377\377\377\177\000\000\000\000\000\000\000\000\000\000\214\206- \244\377\177\000\000\234\204- \244\001\000\000\000\030\000\000\000\377\177\000\000p\204-\244\377\177\000\000 \204-\244\377\177\000\000XYE_4\177\000\000\340\332v_4\177\000\000\350\204- \244\377\177\000\000XYE_4\177\000\000\v", '\000' <repeats 15 times>, "C\274\n]4\177\000\000<?php\000\nini_set('memory_limit', '512M');\nmb_internal_encoding('U\000\000\000\000\000\000\000\000\000\261\365\37 1c;T\212\231\006\000\000\000\004\000\000\000\070\202G_4\177\000\000\000\205- \244\377\177\000\000\377\377\377\377\000\000\000\000\070\000\000\000\000\000\000 \000\350FY^4\177\000\000\030\365\177^4\177"... __orig_bailout = 0x7fffa42d9410 __bailout = {{__jmpbuf = {139862732847936, 1758628069745435855, 139862913548856, 0, -4294967295, 139862900471064, 1758628066459198671, 1869000699703272655}, __mask_was_saved = 0, __saved_mask = {__val = {139862913535504, 139862927498320, 139862876011587, 139862913535592, 139862886427163, 0, 140735947833992, 0, 0, 0, 0, 139862913523208, 139862886426286, 0, 139862913523208, 140735947834144}}}} prepend_file_p = <value optimized out> append_file_p = 0x0 prepend_file = {type = ZEND_HANDLE_FILENAME, filename = 0x0, opened_path = 0x0, handle = {fd = 0, fp = 0x0, stream = {handle = 0x0, isatty = 0, mmap = {len = 0, pos = 0, map = 0x0, buf = 0x0, old_handle = 0x0, old_closer = 0}, reader = 0, fsizer = 0, closer = 0}}, free_filename = 0 '\000'} append_file = {type = ZEND_HANDLE_FILENAME, filename = 0x0, opened_path = 0x0, handle = {fd = 0, fp = 0x0, stream = {handle = 0x0, isatty = 0, mmap = {len = 0, pos = 0, map = 0x0, buf = 0x0, old_handle = 0x0, old_closer = 0}, reader = 0, fsizer = 0, closer = 0}}, free_filename = 0 '\000'} old_cwd = 0x7fffa42d71d0 "/" use_heap = 0 '\000' retval = 0 #10 0x00007f3454528425 in php_handler (r=0x7f345f478238) at /usr/src/debug/php- 5.3.3/sapi/apache2handler/sapi_apache2.c:669 zfd = {type = ZEND_HANDLE_FILENAME, filename = 0x7f34601d29e8 "/var/www/app/www.example.org/current/htdocs/index.php", opened_path = 0x0, handle = {fd = 1593208992, fp = 0x7f345ef670a0, stream = {handle = 0x7f345ef670a0, isatty = 0, mmap = {len = 139862913548856, pos = 139862913341960, map = 0x7f345f4784b0, buf = 0x7f345f445a88 "0bD_4\177", old_handle = 0x7f345e5dca31, old_closer = 0x7f345f478238}, reader = 0x7f345f455cb8, fsizer = 0x7fffa42d9590, closer = 0x7f345f4784c0}}, free_filename = 0 '\000'} __orig_bailout = 0x0 __bailout = {{__jmpbuf = {139862907840360, -1758463573704891185, 139862913548856, 0, -4294967295, 139862900471064, 1758628069571372239, 1869000539895047375}, __mask_was_saved = 0, __saved_mask = {__val = {139861315026952, 0, 139862913547752, 139862913407320, 139862913407320, 139862913547064, 139862916651656, 38654705664, 11063748048646174129, 18446744073709551615, 139862784509049, 18446744073709551615, 18446744073709551615, 139862927550952, 139862769682950, 18446744073709551615}}}} ctx = 0x7f345f76de30 conf = 0x7f345f04db08 brigade = 0x7f345f76e918 bucket = <value optimized out> rv = <value optimized out> parent_req = 0x0 #11 0x00007f345e5d1980 in ?? () No symbol table info available. #12 0x00007f345f478238 in ?? () No symbol table info available. #13 0x00007f345f109998 in ?? () No symbol table info available. #14 0x00007f345f4559d8 in ?? () No symbol table info available. #15 0x00007f345e5d523e in ?? () No symbol table info available. #16 0x0000000000000000 in ?? () No symbol table info available.