Bug #75366 [NEW]: Raising memory_limit causes script to fail with no error.

From: vasilios at betoglou dot com Operating system: Linux helios 4.4.0-89-generic #1 PHP version: 7.0.24 Package: Reproducible crash Bug Type: Bug Bug description:Raising memory_limit causes script to fail with no error. Description: ------------ I have a script that searches through files on the local system for a particular string and returns the results. The form page does an ajax call to the function page. This uses shell_exec to run the command locally. If, while the command is running, the results get too large, an error like this is thrown: [Thu Oct 12 12:21:49.963798 2017] [:error] [pid 16001] [client 172.19.32.179:50338] PHP Fatal error: Allowed memory size of 41943040 bytes exhausted (tried to allocate 23068704 bytes) in /var/www/html/wp-content/themes/twentyfourteen-child/results.php on line 28, referer: https://<url>/metadata-search/ I upped the memory limit from 512M to 1024M I get an OOM error. I upped the limit to 2048M, no error is logged, but the script just stops as if it had crashed. Any value above ~1400M seems to be causing this issue, where the script returns no results and nothing is logged. If I search for a term that returns smaller results, everything works fine: (find command run CLI for example as to what the script is dealing with) <user>@<host>:~$ find /home/metadata/arl.data/arlindex.xml -type f | xargs grep -E 'host' /dev/null -nr |wc -l 863439 > OOM with memory_limit < ~1400M, script just dies if > ~1400M, no error thrown. <user>@<host>:~$ find /home/metadata/arl.data/arlindex.xml -type f | xargs grep -E 'betoglo' /dev/null -nr |wc -l 11 > WORKS FINE Test script: --------------- $cmd="find $directory$filename -type f | xargs grep -E '$terms' $range /dev/null -nr"; $link=shell_exec($cmd); Expected result: ---------------- I expect to see an OOM error or correct results. Actual result: -------------- I see no OOM error in /var/log/apache/error.log, the script dies with no results. -- Edit bug report at https://bugs.php.net/bug.php?id=75366&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=75366&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=75366&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=75366&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=75366&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=75366&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=75366&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=75366&r=needscript Try newer version: https://bugs.php.net/fix.php?id=75366&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=75366&r=support Expected behavior: https://bugs.php.net/fix.php?id=75366&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=75366&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=75366&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=75366&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=75366&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=75366&r=dst IIS Stability: https://bugs.php.net/fix.php?id=75366&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=75366&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=75366&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=75366&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=75366&r=mysqlcfg