file_get_contents causes bus error on certain offsets
| Bug #39673 | file_get_contents causes bus error on certain offsets | ||||
|---|---|---|---|---|---|
| Submitted: | 2006-11-29 02:07 UTC | Modified: | 2006-11-29 11:13 UTC | ||
| From: | cstdenis at ctgameinfo dot com | Assigned: | tony2001 (profile) | ||
| Status: | Closed | Package: | Filesystem function related | ||
| PHP Version: | 5CVS-2006-11-29 (snap) | OS: | FreeBSD 6.1-RELEASE | ||
| Private report: | No | CVE-ID: | None | ||
[2006-11-29 02:07 UTC] cstdenis at ctgameinfo dot com
Description:
------------
Note: this MAY be the same bug as #37866 but it was closed due to lack of CVS testing and I can not add a comment to it.
May also be related to #35886 but its marked fixed in cvs and win32 only.
Example background
------------------
karin# ll cache/profiles/c/cstdenis.html
-rw-r--r-- 1 www site5 23177 Nov 28 16:54 cache/profiles/c/cstdenis.html
All tests done via CLI. Not tested under apache
Reproduce code:
---------------
Code
----
<?php
echo file_get_contents('cache/profiles/c/cstdenis.html', false, null, 1399);
?>
outputs contents of file from offset 1399
<?php
echo file_get_contents('cache/profiles/c/cstdenis.html', false, null, 1400);
?>
Bus error
Expected result:
----------------
File contents from offset
Actual result:
--------------
Bus Error
Backtrace of core
-----------------
#0 0x28588322 in memcpy () from /lib/libc.so.6
[New LWP 100443]
(gdb) bt
#0 0x28588322 in memcpy () from /lib/libc.so.6
Cannot access memory at address 0xbfbfd29c
Latest CVS snap still has the same problem.
Backtrace of 5.2.1-dev core
----------------------------
#0 0x2869c329 in memcpy () from /lib/libc.so.6
(gdb) bt
#0 0x2869c329 in memcpy () from /lib/libc.so.6
Cannot access memory at address 0xbfbfd25c
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[2006-11-29 11:13 UTC] tony2001@php.net