#36363 [Opn]: php gets segv in _php_stream_read/memcpy
| From: | pajoye@php.net | Date: | Sat, 11 Feb 2006 00:47:10 +0000 |
| Subject: | #36363 [Opn]: php gets segv in _php_stream_read/memcpy | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-93149@lists.php.net to get a copy of this message | ||
ID: 36363
Updated by: pajoye@php.net
Reported By: holgerk44 at freenet dot de
Status: Open
Bug Type: Reproducible crash
Operating System: RHEL 4
PHP Version: 5.1.2
New Comment:
It should not segfault but I think you misuse fread. I suppose your
"photo" field is a binary object containing images? Then simply use
file_put_contents to store them back to the filesystem.
As a sidenote, use error_reporting(E_ALL) in you script.
Previous Comments:
------------------------------------------------------------------------
[2006-02-11 00:25:09] holgerk44 at freenet dot de
Description:
------------
trying to read large database objects (>64K) via PDO from an informix
database via a stream causes a crash of the php executable
Reproduce code:
---------------
$query=$dbh->query("select * from large ");
$row=$query->fetch(PDO::FETCH_ASSOC);
while ( $row ) {
$file = fopen ("/tmp/large.photo.$count","w");
$test=fread($row["PHOTO"],20000);
while($test) {
fwrite ( $file, $test) ;
$test=fread($row["PHOTO"],20000);
}
fclose ( $file);
}
Expected result:
----------------
an error in case of misprogramming.
Actual result:
--------------
#0 0x007933dc in memcpy () from /lib/tls/libc.so.6
#1 0x081db395 in _php_stream_read (stream=0x97a4ffd, buf=0x9794d3d
"",
size=3219790640)
at /home/php/main/streams/streams.c:618
#2 0x08180fa3 in zif_fread (ht=2, return_value=0x9760b6c,
return_value_ptr=0x0, this_ptr=0x0, return_value_used=1)
at /home/php/ext/standard/file.c:1811
#3 0x082192ec in zend_do_fcall_common_helper_SPEC
(execute_data=0xbfeaa650)
at /home/php/Zend/zend_vm_execute.h:192
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=36363&edit=1