Bug #69149 [Com]: The PCRE extension crashes seeminglessly due to memory leaks or double free

Edit report at https://bugs.php.net/bug.php?id=69149&edit=1 ID: 69149 Comment by: hzmester at freemail dot hu Reported by: gregory at luni dot fr Summary: The PCRE extension crashes seeminglessly due to memory leaks or double free Status: Verified Type: Bug Package: *Regular Expressions Operating System: OSX, Linux PHP Version: master-Git-2015-02-28 (Git) Block user comment: N Private report: N New Comment: Which pcre version? As far as I remember 8.35 has an alternative compiling bug. Previous Comments: ------------------------------------------------------------------------ [2015-03-01 15:27:29] laruence@php.net seems it's a bug in pcrelib .. anyway, must related to pcre jit we introduced recently. php -d pcre.jit=0 runs fine.. ==6629== Invalid write of size 8 ==6629== at 0x4DEDE6: _pcre_jit_compile (pcre_jit_compile.c:10313) ==6629== by 0x4B532E: php_pcre_study (pcre_study.c:1585) ==6629== by 0x4E440D: pcre_get_compiled_regex_cache (php_pcre.c:420) ==6629== by 0x4E4F46: php_do_pcre_match (php_pcre.c:570) ==6629== by 0x4E6861: zif_preg_match (php_pcre.c:904) ==6629== by 0xA86BE2: ZEND_DO_ICALL_SPEC_HANDLER (zend_vm_execute.h:511) ==6629== by 0xA863E8: execute_ex (zend_vm_execute.h:352) ==6629== by 0xA86543: zend_execute (zend_vm_execute.h:381) ==6629== by 0xA36775: zend_execute_scripts (zend.c:1282) ==6629== by 0x9A8220: php_execute_script (main.c:2527) ==6629== by 0xAE349D: do_cli (php_cli.c:979) ==6629== by 0xAE452E: main (php_cli.c:1355) ==6629== Address 0x11a2bc88 is 24 bytes before a block of size 120 alloc'd ==6629== at 0x4A078B8: malloc (vg_replace_malloc.c:270) ==6629== by 0x4B701C: sljit_create_compiler (sljitLir.c:335) ==6629== by 0x4DD55B: _pcre_jit_compile (pcre_jit_compile.c:9964) ==6629== by 0x4B532E: php_pcre_study (pcre_study.c:1585) ==6629== by 0x4E440D: pcre_get_compiled_regex_cache (php_pcre.c:420) ==6629== by 0x4E4F46: php_do_pcre_match (php_pcre.c:570) ==6629== by 0x4E6861: zif_preg_match (php_pcre.c:904) ==6629== by 0xA86BE2: ZEND_DO_ICALL_SPEC_HANDLER (zend_vm_execute.h:511) ==6629== by 0xA863E8: execute_ex (zend_vm_execute.h:352) ==6629== by 0xA86543: zend_execute (zend_vm_execute.h:381) ==6629== by 0xA36775: zend_execute_scripts (zend.c:1282) ==6629== by 0x9A8220: php_execute_script (main.c:2527) ------------------------------------------------------------------------ [2015-03-01 00:15:44] gregory at luni dot fr the error does not occur with this similar regex : /(?:(?:public|protected|private)\s+)(?:(?:final|abstract|static)\s+)?\s+function\s+test\([^\)]*\)\s*(?:\{(?:[^{}]*|(?R))*\})/sm ------------------------------------------------------------------------ [2015-02-28 23:49:37] gregory at luni dot fr Added backtrace : (gdb) backtrace #0 0x00007fff9b897286 in __pthread_kill () from /usr/lib/system/libsystem_kernel.dylib #1 0x00007fff9631942f in pthread_kill () from /usr/lib/system/libsystem_pthread.dylib #2 0x00007fff8d8d3b53 in abort () from /usr/lib/system/libsystem_c.dylib #3 0x00007fff8d89bc39 in __assert_rtn () from /usr/lib/system/libsystem_c.dylib #4 0x000000010071c97c in zend_function_dtor (zv=0x7fff5fbfe058) at Zend/zend_opcode.c:122 #5 0x000000010074b680 in _zend_hash_del_el_ex (ht=0x101413a70, idx=1462, p=0x101854ac0, prev=0x0) at Zend/zend_hash.c:845 #6 0x000000010074cb69 in _zend_hash_del_el (ht=0x101413a70, idx=1462, p=0x101854ac0) at Zend/zend_hash.c:869 #7 0x000000010074d33c in zend_hash_reverse_apply (ht=0x101413a70, apply_func=0x1007151a0 <clean_non_persistent_function>) at Zend/zend_hash.c:1384 #8 0x0000000100714e59 in shutdown_executor () at Zend/zend_execute_API.c:345 #9 0x000000010073349e in zend_deactivate () at Zend/zend.c:890 #10 0x00000001006823d2 in php_request_shutdown (dummy=0x0) at main/main.c:1850 #11 0x00000001007fe1be in do_cli (argc=2, argv=0x101413760) at sapi/cli/php_cli.c:1156 #12 0x00000001007fc313 in main (argc=2, argv=0x101413760) at sapi/cli/php_cli.c:1355 ------------------------------------------------------------------------ [2015-02-28 23:19:40] gregory at luni dot fr Changed title ------------------------------------------------------------------------ [2015-02-28 23:18:01] gregory at luni dot fr Description: ------------ There is an error on the PCRE extension and memory management, I can't determine exactly what's happening, I have These 2 types of messages : php7(42118,0x7fff7e1dd300) malloc: *** error for object 0x7f8022f02b28: incorrect checksum for freed object - object was probably modified after being freed. *** set a breakpoint in malloc_error_break to debug Abort trap: 6 Assertion failed: (function->type == 1), function zend_function_dtor, file /Users/gplanchat/CLionProjects/php-src/Zend/zend_opcode.c, line 122. Abort trap: 6 This is the configure command I used on my mac : ./configure --prefix=$HOME/tmp/usr --with-config-file-path=$HOME/tmp/usr/etc --enable-mbstring --enable-zip --enable-bcmath --enable-pcntl --enable-ftp --enable-exif --enable-calendar --enable-sysvmsg --enable-sysvsem --enable-sysvshm --enable-wddx --with-curl --with-mcrypt --with-iconv --with-gmp --with-gd --with-jpeg-dir=/usr/local/opt/jpeg/include/ --with-png-dir=/usr/local/opt/libpng/include/ --with-zlib-dir=/usr --with-freetype-dir=/usr --with-t1lib=/usr --enable-gd-native-ttf --enable-gd-jis-conv --with-openssl --with-pdo-mysql=mysqlnd --with-gettext=/usr/local/opt/gettext/ --with-zlib=/usr --with-bz2=/usr --with-recode=/usr --with-mysqli=mysqlnd --enable-debug --enable-maintainer-mode I'm using OSX 10.10 Yosemite, with the latest master (34ff6bbb0df152694e648161b149d41270fccdcb). Test script: --------------- <?php $buffer = 'public function test(){return true;}'; preg_match('/(?:public|protected|private|final|abstract|static)*?' . '\s+function\s+test\([^\)]*\)\s*(?:\{(?:[^{}]*|(?R))*\})/sm', $buffer, $matches); var_dump($matches[0]); Expected result: ---------------- string(36) "public function test(){return true;}" Actual result: -------------- Either : php7(42118,0x7fff7e1dd300) malloc: *** error for object 0x7f8022f02b28: incorrect checksum for freed object - object was probably modified after being freed. *** set a breakpoint in malloc_error_break to debug Abort trap: 6 Or either : Assertion failed: (function->type == 1), function zend_function_dtor, file /Users/gplanchat/CLionProjects/php-src/Zend/zend_opcode.c, line 122. Abort trap: 6 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=69149&edit=1