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Bug #48993 Opening error_log causes segfault
Submitted: 2009-07-20 22:37 UTC Modified: 2009-07-21 13:30 UTC
From: rick at bluehost dot com Assigned:
Status: Closed Package: Reproducible crash
PHP Version: 5.2.10 OS: CentOS 5.3
Private report: No CVE-ID: None
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From: rick at bluehost dot com
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 [2009-07-20 22:37 UTC] rick at bluehost dot com 
Description:
------------
With 5.2.10 I am receiving a segfault whenever the error_log file is opened.  If recompiled on the same server with php 5.2.9, it completes with an successful entry in the error_log.  If the facility is changed to syslog in 5.2.10, it completes successfully with an entry sent to syslog.

Reproduce code:
---------------
Any error causing entry in php.ini will trigger the segfault.  IE, "extension=bogus.so".  php -v will cause a segfault with that in the ini file.

Expected result:
----------------
An entry successfully appended to ./error_log stating the error.

Actual result:
--------------
strace of php -v with "extension=bogus.so" in ./php.ini

~~~~~~~
open("/usr/local/lib/php/extensions/no-debug-zts-20060613/bogus.so", O_RDONLY) = -1 ENOENT (No such file or directory)
lstat("/home1", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat("/home1/bluehost", {st_mode=S_IFDIR|0710, st_size=4096, ...}) = 0
lstat("/home1/bluehost/public_html", {st_mode=S_IFDIR|0755, st_size=4096, ...}) = 0
lstat("/home1/bluehost/public_html/error_log", 0x7fff4cd2c760) = -1 ENOENT (No such file or directory)
open("/home1/bluehost/public_html/error_log", O_WRONLY|O_CREAT|O_APPEND, 0644) = 3
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++

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 [2009-07-21 13:30 UTC] jani@php.net 
This bug has been fixed in SVN.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
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