Bug #77683 [Opn]: Segfault possibly by strange chars

Edit report at https://bugs.php.net/bug.php?id=77683&edit=1 ID: 77683 Updated by: danack@php.net Reported by: pascal dot nobus at webservice dot be Summary: Segfault possibly by strange chars Status: Open Type: Bug Package: *General Issues Operating System: Slackware 14.1 PHP Version: 7.1.26 Block user comment: N Private report: N New Comment: > there is nog imagemagic on this system. Whether or not ImageMagick is on the system, something is called putenv with the string "MAGICK_THREAD_LIMIT=1". From your crash log: #1 0x00007f6db12af58e in zif_putenv (execute_data=<optimized out>, return_value=0x7f6d9eff2730) at /usr/local/src/php-7.1.26/ext/standard/basic_functions.c:4178 setting = 0x7f6d829f19a8 "MAGICK_THREAD_LIMIT=1" setting_len = 21 p = 0x7f6d423e0a4b "" env = 0x7f6d6c02f778 pe = {putenv_string = 0x7f6d8b26b438 "MAGICK_THREAD_LIMIT=1", previous_value = 0x0, key = 0x7f6d423e0a38 "MAGICK_THREAD_LIMIT", key_len = 19} > so no special things that is calling setlocale. Again, the crash log says that's exactly where one of the crashes comes from: #1 0x00007f6db5a80d76 in setlocale () from /lib64/libc.so.6 No symbol table info available. #2 0x00007f6db12e5de0 in zif_setlocale (execute_data=<optimized out>, return_value=0x7f6d9bfec640) For reference, I can see that there are some setlocale calls in Drupal: https://github.com/drupal/core/blob/6864b728155310851b3919e41c0d32941c5e62ae/lib/Drupal/Core/DrupalKernel.php#L1028 It's not guaranteed to be the cause, but seeing as that is where the errors are occurring, it does seem worth the effort to track these down and try removing them to see if that fixes the problem. Previous Comments: ------------------------------------------------------------------------ [2019-03-01 08:52:18] pascal dot nobus at webservice dot be The segfaults are also occurring on apache mpm-prefork, which is non-threaded ------------------------------------------------------------------------ [2019-03-01 08:28:12] nikic@php.net Note that thread-safety in PHP 7.0 and 7.1 is pretty thoroughly broken. If you're running in a threaded environment, then PHP 7.2 (or newer) is needed. ------------------------------------------------------------------------ [2019-03-01 07:15:12] pascal dot nobus at webservice dot be Danack: - there is nog imagemagic on this system. - sites are Wordpress-5.1, Wordpress-4.9.9, Drupal-8.2.6, so no special things that is calling setlocale. It seems to me that disabling opcache helped a bit (4 Segfault in 24h, insteadoff 10-20). Another thought that is was hardware, or the fact that apache is mpm_event (with php compiled as mod_php) was also ruled out because I see the same effect on other servers (also ones compiled with mpm_prefork). ------------------------------------------------------------------------ [2019-03-01 03:16:27] danack@php.net Please could you also try to find what is calling setlocale and seeing if that can be disabled? ------------------------------------------------------------------------ [2019-03-01 03:03:19] danack@php.net So possibly this might be an altering the environment issue. One of the stacks appears to be something writing "MAGICK_THREAD_LIMIT=1" into the environment. This can also be achieve by editing the policy.xml file that was installed by ImageMagick, that will be on your system somewhere. Either editing or adding an entry for thread, like: <policy domain="resource" name="thread" value="1"/> Can you try doing that, and seeing if that at least removes those entries from your system? ------------------------------------------------------------------------ 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=77683 -- Edit this bug report at https://bugs.php.net/bug.php?id=77683&edit=1