Bug #76844 [Ana->Csd]: PHP crashes on big file with array inside

Edit report at https://bugs.php.net/bug.php?id=76844&edit=1 ID: 76844 Updated by: nielsdos@php.net Reported by: denis at bitrix dot ru Summary: PHP crashes on big file with array inside -Status: Analyzed +Status: Closed Type: Bug Package: opcache Operating System: Ubuntu 14.04.5 LTS PHP Version: 7.2.9 -Assigned To: +Assigned To: nielsdos Block user comment: N Private report: N New Comment: The fix for this bug has been committed. If you are still experiencing this bug, try to check out latest source from https://github.com/php/php-src and re-test. Thank you for the report, and for helping us make PHP better. Fixed by Dmitry via https://github.com/php/php-src/commit/bd185c3dd5f8811319db442ba6f8dd3d15515f3f Previous Comments: ------------------------------------------------------------------------ [2021-07-08 14:09:37] cmb@php.net Related To: Bug #77620 ------------------------------------------------------------------------ [2019-06-29 13:09:02] cmb@php.net Related To: Bug #77620 ------------------------------------------------------------------------ [2018-09-06 08:40:52] nikic@php.net @rhsoft: The interned strings buffer is not really relevant to this issue. As @cmb pointed out, this is a stack overflow in zend_ssa_check_scc_var. The test script has a very long (and linear) chain of uses, each of which results in another recursive call. This could be resolved either by making the algorithm non-recursive or adding / changing some limits. E.g. we might want to punt on SSA optimizations if there are too many SSA vars. ------------------------------------------------------------------------ [2018-09-06 08:31:07] spam2 at rhsoft dot net "Fatal Error Zend OPcache cannot allocate buffer for interned strings" clearly indicates that "opcache.memory_consumption" is way too small frankly if you can allocate 18 MB i guess someone has lowered the default value ------ -rw-r--r-- 1 root root 198K 2018-03-05 16:37 /usr/share/phpMyAdmin/vendor/tecnickcom/tcpdf/fonts/dejavusans.ph /usr/share/phpMyAdmin/vendor/tecnickcom/tcpdf/fonts/dejavusans.php allocates 1,36 MB in opcache so your guess 16M should be enough for 12M file is pretty wrong ------------------------------------------------------------------------ [2018-09-06 08:24:47] denis at bitrix dot ru opcache.interned_strings_buffer doesn't seem to affect: $ php -i|grep opcache.interned_strings_buffer opcache.interned_strings_buffer => 8 => 8 $ php -d opcache.enable_cli=1 -d opcache.interned_strings_buffer=16 restore.file_list.php Segmentation fault I guess, 16M should be enough for 12M file. And further I got an error: $ php -d opcache.enable_cli=1 -d opcache.interned_strings_buffer=18 restore.file_list.php Thu Sep 6 10:19:14 2018 (12707): Fatal Error Zend OPcache cannot allocate buffer for interned strings ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=76844 -- Edit this bug report at https://bugs.php.net/bug.php?id=76844&edit=1