ID: 35886
Updated by: tony2001@php.net
Reported By: chris at lodesys dot com
-Status: Verified
+Status: Assigned
Bug Type: Reproducible crash
Operating System: win32 only
PHP Version: 5CVS-2006-01-03 (snap)
-Assigned To:
+Assigned To: wez
New Comment:
Assigned to the maintainer.
Previous Comments:
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[2006-01-05 02:21:26] nlopess@php.net
OK, the problem is in the MapViewOfFile() call in
php_stdiop_set_option(), because it is mapping less data than we've
asked.
It seems a windows problem to me, but I'm leaving open because this can
be a serious bug (although I'm not able to fix it..).
------------------------------------------------------------------------
[2006-01-05 00:26:24] nlopess@php.net
OK, back from the school exams, the problem seems to be in
php_stdiop_set_option(), because it is allocating one less byte than it
should. (and that mmap code is specific for windows).
I'll try to investigate the problem further and produce a patch.
------------------------------------------------------------------------
[2006-01-04 01:25:08] sniper@php.net
Nuno, if you can reproduce -> provide the backtrace.
------------------------------------------------------------------------
[2006-01-04 00:11:14] nlopess@php.net
I'm able to reproduce the crash on Windows XP.
------------------------------------------------------------------------
[2006-01-03 20:01:56] chris at lodesys dot com
Description:
------------
This one is weird. For some value of offset & maxlen,
file_get_contents will fail and crash PHP. (I'm running under Apache
1.3.34 and get a Dr. Watson). The combination may have something to do
with offset + maxlen just above 4096, but even that's not consistant.
Reproduce code:
---------------
$x = file_get_contents("C:/php/news.txt", FALSE, NULL, 500, 3596); //
WORKS
$x = file_get_contents("C:/php/news.txt", FALSE, NULL, 500, 3597); //
FAILS
$x = file_get_contents("C:/php/news.txt", FALSE, NULL, 500, 4096); //
FAILS
$x = file_get_contents("C:/php/news.txt", FALSE, NULL, 500, 4097); //
WORKS
$x = file_get_contents("C:/php/news.txt", FALSE, NULL, 1000, 4096); //
FAILS
$x = file_get_contents("C:/php/news.txt", FALSE, NULL, 1000, 4097); //
WORKS
$x = file_get_contents("C:/php/news.txt", FALSE, NULL, 0, 4096); //
WORKS
$x = file_get_contents("C:/php/news.txt", FALSE, NULL, 0, 4097); //
WORKS
Expected result:
----------------
All combinations of offset & maxlen should work as news.txt is 74 KB
long.
Actual result:
--------------
PHP fails in some instances (see above) with Dr. Watson reporting
"Application exception occurred: App: (pid=1828)[apache.exe] Exception
number: c0000005 (access violation)"
Using
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Edit this bug report at http://bugs.php.net/?id=35886&edit=1