Bug #77465 [Com]: Segfault with PHP built-in server

Edit report at https://bugs.php.net/bug.php?id=77465&edit=1 ID: 77465 Comment by: girgias@php.net Reported by: girgias@php.net Summary: Segfault with PHP built-in server Status: Open Type: Bug Package: Built-in web server Operating System: WSL with Ubuntu 18.04 PHP Version: 7.3.1 Block user comment: N Private report: N New Comment: So this is not related to Guzzle, it segfault during an instantiation of an object. This example code: <?php $object = new stdClass(); Will output the following gdb trace: gdb --args php -S localhost:8000 -t public/ -d display_errors=1 GNU gdb (Ubuntu 8.1-0ubuntu3) 8.1.0.20180409-git Copyright (C) 2018 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from php...(no debugging symbols found)...done. (gdb) r Starting program: /usr/bin/php -S localhost:8000 -t public/ -d display_errors=1 [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". PHP 7.3.1-1+ubuntu18.04.1+deb.sury.org+1 Development Server started at Wed Jan 16 12:29:10 2019 Listening on http://localhost:8000 Document root is /mnt/c/Dev/Sites/test-bug/public Press Ctrl-C to quit. [Wed Jan 16 12:29:15 2019] 127.0.0.1:57012 [200]: / [Wed Jan 16 12:29:16 2019] 127.0.0.1:57013 [404]: /favicon.ico - No such file or directory Program received signal SIGPIPE, Broken pipe. 0x00007ffffd2f2c4d in __libc_send (fd=5, buf=0x8ace8f8, len=55, flags=0) at ../sysdeps/unix/sysv/linux/send.c:28 28 ../sysdeps/unix/sysv/linux/send.c: No such file or directory. (gdb) Previous Comments: ------------------------------------------------------------------------ [2019-01-16 11:23:59] girgias@php.net Okay, I think I have narrowed down from where the problem comes. Or it comes from Guzzle ("guzzlehttp/psr7": "^1.5") Or it comes from first instantiating an object. gdb backtrace for the following code example: <?php require '../vendor/autoload.php'; $response = new GuzzleHttp\Psr7\Response(200, [], 'Hello World'); gdb output: gdb --args php -S localhost:8000 -t public/ -d display_errors=1 GNU gdb (Ubuntu 8.1-0ubuntu3) 8.1.0.20180409-git Copyright (C) 2018 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from php...(no debugging symbols found)...done. (gdb) r Starting program: /usr/bin/php -S localhost:8000 -t public/ -d display_errors=1 [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". PHP 7.3.1-1+ubuntu18.04.1+deb.sury.org+1 Development Server started at Wed Jan 16 12:19:29 2019 Listening on http://localhost:8000 Document root is /mnt/c/Dev/Sites/test-bug/public Press Ctrl-C to quit. [Wed Jan 16 12:19:30 2019] 127.0.0.1:56899 [200]: / [Wed Jan 16 12:19:30 2019] 127.0.0.1:56900 [404]: /favicon.ico - No such file or directory Program received signal SIGPIPE, Broken pipe. 0x00007ffffd2f2c4d in __libc_send (fd=5, buf=0x8a1aaf8, len=55, flags=0) at ../sysdeps/unix/sysv/linux/send.c:28 28 ../sysdeps/unix/sysv/linux/send.c: No such file or directory. I will try to figure out if it's only related to Guzzle or if it's a general problem. ------------------------------------------------------------------------ [2019-01-16 11:01:40] girgias@php.net So it does not crash on *any* file, an empty file and a simple echo "Hello World"; work just fine. Will dig deeper and see if it's related to the fact that I'm using http-interop Http\Response\send function with a PSR-7 object instead of a simple echo to display output. ------------------------------------------------------------------------ [2019-01-16 10:25:39] girgias@php.net I just run the command by running it directly under gdb and got this output: gdb --args php -S localhost:8000 -t public/ -d display_errors=1 GNU gdb (Ubuntu 8.1-0ubuntu3) 8.1.0.20180409-git Copyright (C) 2018 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from php...(no debugging symbols found)...done. (gdb) r Starting program: /usr/bin/php -S localhost:8000 -t public/ -d display_errors=1 [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". PHP 7.3.1-1+ubuntu18.04.1+deb.sury.org+1 Development Server started at Wed Jan 16 11:22:50 2019 Listening on http://localhost:8000 Document root is /mnt/c/Dev/Sites/personal/public Press Ctrl-C to quit. Program received signal SIGSEGV, Segmentation fault. 0x000000000831c508 in ?? () I will try if this applies even to an empty PHP file. ------------------------------------------------------------------------ [2019-01-16 08:07:44] nikic@php.net When you say "any web page" is that really *any* (e.g. an empty php file)? Is it possible to get a backtrace by directly running under gdb? (gdb --args php -S localhost:8000 -t public/ -d display_errors=1 and then "r") ------------------------------------------------------------------------ [2019-01-16 06:09:30] girgias@php.net Also seems like this issue on Zend framework is related to this. https://github.com/zendframework/zend-diactoros/issues/343 And for a gdb backtrace seems like it's impossible with WSL (c.f. https://github.com/Microsoft/WSL/issues/1262 ). ------------------------------------------------------------------------ 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=77465 -- Edit this bug report at https://bugs.php.net/bug.php?id=77465&edit=1