Bug #13806 Updated: zlib compression is broken?

ID: 13806 User updated by: yasuo_ohgaki@yahoo.com Reported By: yasuo_ohgaki@yahoo.com Status: Open Bug Type: Reproducible crash Operating System: Linux 2.4.14-pre3/glibc 2.2.2 PHP Version: 4.1.0 RC CVS-2001-10-24 New Comment: Problem is appearent if output is larger than output buffer size. httpd exits with code 01 with following script (No output) <?php for ($i=0; $i < 1024; $i++) echo 'abcd'; ?> but it not with (Output is correct) <?php for ($i=0; $i < 1023; $i++) echo 'abcd'; ?> It exits with code 01 with more complex script w/o output, though. Previous Comments: ------------------------------------------------------------------------ [2001-10-28 08:50:56] yasuo_ohgaki@yahoo.com Upgraded from apache 1.3.20 to 1.3.22. httpd exited with status code 01 while running under gdb. (gdb) run -X Starting program: /usr/sbin/httpd -X Program exited with code 01. (gdb) ------------------------------------------------------------------------ [2001-10-28 07:29:53] yasuo_ohgaki@yahoo.com via-rihine chipset NIC dvriver seems to be fixed in 2.4.13, finanlly :) I could upgrade kernel from 2.4.4 to 2.4.14-pre3. It seems many *.c files are not modified for new asm/*.h files, yet. (It was the same, when I tried 2.4.13) Therefore, I couldn't use the same config as 2.4.4. I was using 2.4.4 kernel that comes with my distribution. Most of kernel drivers/options are compiled in or compiled as module. I'm using kernel optimized for my test PC now. Kernel may crash with other options/modules... Anyway, PHP behaves much better with newer kernel. New behavior is as follows. * PHP outputs the top part of the test script "<?php phpinfo(); ?>" correctly. * PHP sends a lot of garbages with the test script. * Kernel seems to stop freezing. + PHP stopped complaining about many memory leaks at shutdown. Problem: * When memory limit is enabled, PHP do not terminate script execution even if it is already exhausted memory. (I get multiple error message for a single execution as attached apache error log) * PHP can't send proper phpinfo() output. * PHP segfaults with my scripts. I changed bug type form Zlib Related to Reproducible crash. If your PHP does not segfault easily, please let me know. I'll send back trace. == apache error log start == /home/yohgaki/public_html/test/phpinfo.php(1) : Fatal error - Allowed memory size of 8388608 bytes exhausted at zlib.c:995 (tried to allocate 2915587 bytes) /home/yohgaki/public_html/test/phpinfo.php(1) : Fatal error - Allowed memory size of 8388608 bytes exhausted at zlib.c:995 (tried to allocate 2915587 bytes) /home/yohgaki/public_html/test/phpinfo.php(1) : Fatal error - Allowed memory size of 8388608 bytes exhausted at zlib.c:995 (tried to allocate 2915587 bytes) /home/yohgaki/public_html/test/phpinfo.php(1) : Fatal error - Allowed memory size of 8388608 bytes exhausted at zlib.c:995 (tried to allocate 2915587 bytes) /home/yohgaki/public_html/test/phpinfo.php(1) : Fatal error - Allowed memory size of 8388608 bytes exhausted at zlib.c:995 (tried to allocate 2915587 bytes) /home/yohgaki/public_html/test/phpinfo.php(1) : Fatal error - Allowed memory size of 8388608 bytes exhausted at zlib.c:995 (tried to allocate 2915587 bytes) /home/yohgaki/public_html/test/phpinfo.php(1) : Fatal error - Allowed memory size of 8388608 bytes exhausted at zlib.c:995 (tried to allocate 2915587 bytes) /home/yohgaki/public_html/test/phpinfo.php(1) : Fatal error - Allowed memory size of 8388608 bytes exhausted at zlib.c:995 (tried to allocate 2915587 bytes) /home/yohgaki/public_html/test/phpinfo.php(1) : Fatal error - Allowed memory size of 8388608 bytes exhausted at zlib.c:995 (tried to allocate 2915587 bytes) /home/yohgaki/public_html/test/phpinfo.php(1) : Fatal error - Allowed memory size of 8388608 bytes exhausted at zlib.c:995 (tried to allocate 2915587 bytes) == end == ------------------------------------------------------------------------ [2001-10-27 16:24:56] yasuo_ohgaki@yahoo.com Just an update. Better procedure to reproduce this bug. I can reproduce this bug on RedHat 7.1(kernel 2.4.7) and Kondara 2.0(Kernel 2.4.4) I think this bug is *critical* and better to be fixed/workarounded before 4.1.0 release.... (Or disable zlib.output_compression?) Caution: This can crash your linux kernel and may crash filesystem. 1) Get 4.1.0RC CVS source 2) Copy php.ini-recommend to php.ini and enable zlib.output_compression zlib.output_compression=On 3) configure/build/install PHP 4.1.0RC './configure' \ '--with-apxs' \ '--disable-short-tags' \ '--without-mysql' \ '--without-pear' \ '--with-zlib' \ '--enable-debug' 4) Create test php script containing <?php phpinfo(); ?> 5) restart httpd, diplay the test script 6) Stop httpd and check apache error log see if memory leak is reported or not. ------------------------------------------------------------------------ [2001-10-27 16:09:07] yasuo_ohgaki@yahoo.com This bug may be related to following bugs. http://bugs.php.net/bug.php?id=12270 http://bugs.php.net/bug.php?id=13698 ------------------------------------------------------------------------ [2001-10-24 08:46:19] yasuo_ohgaki@yahoo.com This is not exactly what I've reported, but if following problem is fixed, this bug may be fixed. Fixing this may fix bug #13698, also. (CGI version segfaults at shutdown) php.ini: php.ini-recommened. Only change I've made is enable ZLIB compression. If zlib compression is off, it seems working. Script: <?php phpinfo(); ?> Configure: './configure' \ '--with-apxs' \ '--disable-short-tags' \ '--without-mysql' \ '--without-pear' \ '--with-zlib' \ '--enable-debug' PHP: 4.1.0RC CVS (today) Env: Linux 2.4.4/glibc 2.2.2/zlib 1.1.3 Apache 1.3.20/modssl 2.8.4 Apache error log: Unknown(0) : Fatal error - Maximum execution time of 30 seconds exceeded output.c(307) : Freeing 0x418D502C (9105409 bytes), script=/home/yohgaki/public_html/test/phpinfo.php zlib.c(995) : Freeing 0x4147A02C (4565991 bytes), script=/home/yohgaki/public_html/test/phpinfo.php Last leak repeated 10 times output.c(289) : Freeing 0x081ADD4C (6144 bytes), script=/home/yohgaki/public_html/test/phpinfo.php zend_stack.c(45) : Freeing 0x081AC4BC (40 bytes), script=/home/yohgaki/public_html/test/phpinfo.php zend_stack.c(27) : Freeing 0x081AC38C (256 bytes), script=/home/yohgaki/public_html/test/phpinfo.php Last leak repeated 7 times zend_hash.c(176) : Freeing 0x081AC2F4 (32 bytes), script=/home/yohgaki/public_html/test/phpinfo.php Last leak repeated 9 times zend_hash.c(260) : Freeing 0x081AC244 (44 bytes), script=/home/yohgaki/public_html/test/phpinfo.php Last leak repeated 40 times main.c(1159) : Freeing 0x081AC194 (44 bytes), script=/home/yohgaki/public_html/test/phpinfo.php zend_API.c(561) : Actual location (location was relayed) main.c(1158) : Freeing 0x081AC154 (12 bytes), script=/home/yohgaki/public_html/test/phpinfo.php main.c(1141) : Freeing 0x081ABC04 (44 bytes), script=/home/yohgaki/public_html/test/phpinfo.php zend_API.c(561) : Actual location (location was relayed) main.c(1140) : Freeing 0x081ABBC4 (12 bytes), script=/home/yohgaki/public_html/test/phpinfo.php php_variables.c(170) : Freeing 0x081ABB24 (12 bytes), script=/home/yohgaki/public_html/test/phpinfo.php Last leak repeated 27 times php_variables.c(47) : Freeing 0x081ABAD4 (27 bytes), script=/home/yohgaki/public_html/test/phpinfo.php Last leak repeated 27 times zend_hash.c(438) : Freeing 0x081AB10C (128 bytes), script=/home/yohgaki/public_html/test/phpinfo.php main.c(1022) : Freeing 0x081AA11C (44 bytes), script=/home/yohgaki/public_html/test/phpinfo.php zend_API.c(561) : Actual location (location was relayed) main.c(1021) : Freeing 0x081AA0DC (12 bytes), script=/home/yohgaki/public_html/test/phpinfo.php php_variables.c(229) : Freeing 0x081AA04C (12 bytes), script=/home/yohgaki/public_html/test/phpinfo.php Last leak repeated 1 time php_variables.c(230) : Freeing 0x081A9F94 (44 bytes), script=/home/yohgaki/public_html/test/phpinfo.php zend_API.c(561) : Actual location (location was relayed) Last leak repeated 1 time output.c(325) : Freeing 0x081A86FC (6145 bytes), script=/home/yohgaki/public_html/test/phpinfo.php zend_ptr_stack.c(29) : Freeing 0x081A857C (256 bytes), script=/home/yohgaki/public_html/test/phpinfo.php Last leak repeated 2 times zend_ini.c(193) : Freeing 0x081A7744 (31 bytes), script=/home/yohgaki/public_html/test/phpinfo.php Last leak repeated 2 times [Wed Oct 24 19:24:43 2001] [warn] child process 4029 still did not exit, sending a SIGTERM [Wed Oct 24 19:24:47 2001] [error] child process 4029 still did not exit, sending a SIGKILL [Wed Oct 24 19:24:47 2001] [notice] caught SIGTERM, shutting down ------------------------------------------------------------------------ The remainder of the comments for this report are too long. 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