Bug #73968 [NEW]: Premature failing of XBM reading
From: cmb
Operating system: *
PHP version: 7.0Git-2017-01-20 (snap)
Package: GD related
Bug Type: Bug
Bug description:Premature failing of XBM reading
Description:
------------
libgd's XBM reader calculates the maximum number of image data
bytes to read in advance. However, it doesn't take into account
the line padding, so reading of XBM files with a width that is not
a multiple of 8 is likely to fail, for instance with the following
test.xbm:
#define test_width 10
#define test_height 10
static unsigned char test_bits[] = {
0xFF, 0x03, 0x00, 0x00, 0xFF, 0x03, 0x00, 0x00, 0xFF, 0x03, 0x00,
0x00,
0xFF, 0x03, 0x00, 0x00, 0xFF, 0x03, 0x00, 0x00};
Test script:
---------------
<?php
$im = imagecreatefromxbm(__DIR__ . '/test.xbm');
var_dump($im);
Expected result:
----------------
resource(%d) of type (gd)
Actual result:
--------------
Warning: imagecreatefromxbm(): EOF before image was complete in %s on
line %d
Warning: imagecreatefromxbm(): '%s' is not a valid XBM file in %s on
line %d
bool(false)
--
Edit bug report at https://bugs.php.net/bug.php?id=73968&edit=1
--
Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=73968&r=trysnapshot54
Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=73968&r=trysnapshot55
Try a snapshot (trunk): https://bugs.php.net/fix.php?id=73968&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=73968&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=73968&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=73968&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=73968&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=73968&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=73968&r=support
Expected behavior: https://bugs.php.net/fix.php?id=73968&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=73968&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=73968&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=73968&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=73968&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=73968&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=73968&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=73968&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=73968&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=73968&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=73968&r=mysqlcfg
Thread (3 messages)
- cmb@php.net