#36928 [Opn]: error_log with invalid arguments crashes PHP

ID: 36928 User updated by: michaelw at webcentral dot com dot au Reported By: michaelw at webcentral dot com dot au Status: Open Bug Type: Reproducible crash Operating System: Solaris 9 / PHP Version: 4.4.2 New Comment: I've verified I can reproduce it with the latest CVS snapshot with a compile string of: ./configure --prefix=/opt/php --with-nsapi=/opt/sunapps/web --enable-debug Its probably also worth noting I can replicate it using the CLI.. # gdb sapi/cli/php GNU gdb 6.0 Copyright 2003 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "sparc-sun-solaris2.9"...set (gdb) set args /webdocs/school-hosting/centraloffice/mis-webcentral/www/crash2.php (gdb) run Starting program: /opt/admin/build/php4-STABLE-200603310035/sapi/cli/php /webdocs/school-hosting/centraloffice/mis-webcentral/www/crash2.php Program received signal SIGSEGV, Segmentation fault. 0xff13451c in strlen () from /usr/lib/libc.so.1 (gdb) bt #0 0xff13451c in strlen () from /usr/lib/libc.so.1 #1 0xff186f88 in _doprnt () from /usr/lib/libc.so.1 #2 0xff1889e4 in fprintf () from /usr/lib/libc.so.1 #3 0x0009c374 in php_mail (to=0x0, subject=0x15c8e0 "To: %s\n", message=0x0, headers=0xff1bc000 "", extra_cmd=0x2134a8 "s\022øÜ", tsrm_ls=0x1a6278) at /opt/admin/build/php4-STABLE-200603310035/ext/standard/mail.c:228 Previous Comments: ------------------------------------------------------------------------ [2006-03-31 03:50:28] michaelw at webcentral dot com dot au Hey, This is a better 'Reproduce Code' (it doesn't attempt to send an email if the 2nd variable is a 0, and hence doesn't crash, so depending on what $_SERVER['HTTPS'] evaluated to for you, it might not have errored..): <html> <body> <?php error_log("commas can crash ",1); ?> <p> Test..</p> </body> </html> I'm currently compiling the suggested CVS snapshot and will let you know when I have a result. ------------------------------------------------------------------------ [2006-03-31 03:32:05] bjori@php.net Please try using this CVS snapshot: http://snaps.php.net/php4-STABLE-latest.tar.gz For Windows: http://snaps.php.net/win32/php4-win32-STABLE-latest.zip Can't reproduce ------------------------------------------------------------------------ [2006-03-31 03:08:23] michaelw at webcentral dot com dot au Description: ------------ This was noticed by a developer making a typo ( , instead of . ) when attempting to concat strings within the parameters of error_log. It is reported as a bug because it causes a segfault in PHP which causes the webserver to crash. Reproduce code: --------------- <html> <body> <?php error_log("commas can crash ",($_SERVER['HTTPS'] != 'off')); ?> <p> Test..</p> </body> </html> Expected result: ---------------- Presumably an error indicating that the 2nd parameter passed to error_log is invalid. Actual result: -------------- Program received signal SIGSEGV, Segmentation fault. (gdb) bt #0 0xfedb451c in strlen () from /usr/lib/libc.so.1 #1 0xfee06f88 in _doprnt () from /usr/lib/libc.so.1 #2 0xfee089e4 in fprintf () from /usr/lib/libc.so.1 #3 0x000d0970 in php_mail (to=0x0, subject=0x193868 "To: %s\n", message=0x0, headers=0x0, extra_cmd=0x0, tsrm_ls=0x0) at /opt/admin/build/php-4.4.2/ext/standard/mail.c:228 Presumably the variable should be sanity checked both in php_mail and the error_log function.. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=36928&edit=1