Bug #79128 [Com]: Preloading segfaults if preload_user is used

Edit report at https://bugs.php.net/bug.php?id=79128&edit=1 ID: 79128 Comment by: dotbox at gmail dot com Reported by: dotbox at gmail dot com Summary: Preloading segfaults if preload_user is used Status: Closed Type: Bug Package: opcache Operating System: Debian Buster PHP Version: 7.4.2 Assigned To: nikic Block user comment: N Private report: N New Comment: I can confirm this works. You ROCK! :-D Previous Comments: ------------------------------------------------------------------------ [2020-01-24 15:24:54] nikic@php.net Related To: Bug #79043 ------------------------------------------------------------------------ [2020-01-24 15:20:37] nikic@php.net Automatic comment on behalf of nikita.ppv@gmail.com Revision: http://git.php.net/?p=php-src.git;a=commit;h=3291891408556cb412bf1093a6112951dec1421e Log: Fixed bug #79128 ------------------------------------------------------------------------ [2020-01-24 15:10:19] nikic@php.net Here is the valgrind trace: ==375== Invalid write of size 8 ==375== at 0x126BA2AA: _zend_hash_append_ex (zend_hash.h:1126) ==375== by 0x126C5EEE: preload_load (ZendAccelerator.c:4217) ==375== by 0x126C7906: accel_finish_startup (ZendAccelerator.c:4657) ==375== by 0x126C1FBD: accel_post_startup (ZendAccelerator.c:3032) ==375== by 0x93BE3F: zend_post_startup (zend.c:1002) ==375== by 0x89F166: php_module_startup (main.c:2356) ==375== by 0xA1C48F: php_cli_startup (php_cli.c:407) ==375== by 0xA1E62A: main (php_cli.c:1319) ==375== Address 0x115818a0 is 0 bytes after a block of size 10,240 alloc'd ==375== at 0x4C2FB0F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==375== by 0x903A4E: __zend_malloc (zend_alloc.c:2975) ==375== by 0x9540EE: zend_hash_do_resize (zend_hash.c:1160) ==375== by 0x952D91: _zend_hash_add_or_update_i (zend_hash.c:772) ==375== by 0x953345: zend_hash_update (zend_hash.c:879) ==375== by 0x93E9C0: zend_hash_update_ptr (zend_hash.h:647) ==375== by 0x94928F: do_register_internal_class (zend_API.c:2713) ==375== by 0x94943D: zend_register_internal_class (zend_API.c:2757) ==375== by 0x6BB2C9: spl_register_std_class (spl_functions.c:44) ==375== by 0x6DB4C6: zm_startup_spl_observer (spl_observer.c:1338) ==375== by 0x6BAFDA: zm_startup_spl (php_spl.c:1008) ==375== by 0x945EFA: zend_startup_module_ex (zend_API.c:1860) ------------------------------------------------------------------------ [2020-01-24 14:46:49] nikic@php.net I was able to reproduce this issue outside Docker using "sudo !! -d opcache.preload_user=root". ------------------------------------------------------------------------ [2020-01-24 11:12:49] dotbox at gmail dot com As PHP 7.4.2 was released, although the changes between 7.4.2rc1 and 7.4.2 are minimal, I gave it a try with the new docker images available and I have the exact same segfault. ------------------------------------------------------------------------ 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=79128 -- Edit this bug report at https://bugs.php.net/bug.php?id=79128&edit=1