Bug #72819 [NEW]: EXIF thumbnails not read anymore

From: Date: Fri, 12 Aug 2016 04:45:22 +0000
Subject: Bug #72819 [NEW]: EXIF thumbnails not read anymore
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-203199@lists.php.net to get a copy of this message 
From:             php dot bohwaz at miam dot kd2 dot org
Operating system: Debian Linux Jessie
PHP version:      5.6.24
Package:          EXIF related
Bug Type:         Bug
Bug description:EXIF thumbnails not read anymore

Description:
------------
I am using PHP to extract thumbnails from JPEG files, and this used to
work fine, but I upgraded to PHP 5.6 (from 5.4) and now it seems that
exif_* functions are unable to find thumbnail data in every JPEG file
I'm trying.

Works:

$ php -v && php -r
'var_dump(strlen(exif_thumbnail("http://www.exiv2.org/include/img_1771.jpg")));'
PHP 5.4.45-0+deb7u4 (cli) (built: Jun 29 2016 14:51:18) 
Copyright (c) 1997-2014 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2014 Zend Technologies
int(5448)

Doesn't work:

$ php -v && php -r
'var_dump(strlen(exif_thumbnail("http://www.exiv2.org/include/img_1771.jpg")));'
PHP 5.6.24-0+deb8u1 (cli) (built: Jul 26 2016 08:17:07) 
Copyright (c) 1997-2016 The PHP Group
Zend Engine v2.6.0, Copyright (c) 1998-2016 Zend Technologies
    with Zend OPcache v7.0.6-dev, Copyright (c) 1999-2016, by Zend
Technologies
PHP Warning:  exif_thumbnail(img_1771.jpg): IFD data bad offset:
0xFFFFFC52 length 0x01C2 in Command line code on line 1

Warning: exif_thumbnail(img_1771.jpg): IFD data bad offset: 0xFFFFFC52
length 0x01C2 in Command line code on line 1
int(0)

Same result with exif_read_image_data(), the THUMBNAIL section is never
populated.

Other examples from other cameras:
http://bohwaz.net/photos/2014/02-fevrier/p20140219_193908.jpg
(Panasonic
Lumix GF5)
http://bohwaz.net/photos/2014/01-janvier/p20140117_080901.jpg
(Nokia E7
phone)
http://bohwaz.net/photos/2014/01-janvier/12-Val_Suzon/p20140112_140758.jpg
(Fujifilm HS20 EXR)


Test script:
---------------
var_dump(strlen(exif_thumbnail("http://www.exiv2.org/include/img_1771.jpg")));

Expected result:
----------------
int(5448)

Actual result:
--------------
PHP Warning:  exif_thumbnail(img_1771.jpg): IFD data bad offset:
0xFFFFFC52 length 0x01C2 in Command line code on line 1

Warning: exif_thumbnail(img_1771.jpg): IFD data bad offset: 0xFFFFFC52
length 0x01C2 in Command line code on line 1
int(0)


-- 
Edit bug report at https://bugs.php.net/bug.php?id=72819&edit=1
-- 
Try a snapshot (PHP 5.4):   https://bugs.php.net/fix.php?id=72819&r=trysnapshot54
Try a snapshot (PHP 5.5):   https://bugs.php.net/fix.php?id=72819&r=trysnapshot55
Try a snapshot (trunk):     https://bugs.php.net/fix.php?id=72819&r=trysnapshottrunk
Fixed in SVN:               https://bugs.php.net/fix.php?id=72819&r=fixed
Fixed in release:           https://bugs.php.net/fix.php?id=72819&r=alreadyfixed
Need backtrace:             https://bugs.php.net/fix.php?id=72819&r=needtrace
Need Reproduce Script:      https://bugs.php.net/fix.php?id=72819&r=needscript
Try newer version:          https://bugs.php.net/fix.php?id=72819&r=oldversion
Not developer issue:        https://bugs.php.net/fix.php?id=72819&r=support
Expected behavior:          https://bugs.php.net/fix.php?id=72819&r=notwrong
Not enough info:            https://bugs.php.net/fix.php?id=72819&r=notenoughinfo
Submitted twice:            https://bugs.php.net/fix.php?id=72819&r=submittedtwice
register_globals:           https://bugs.php.net/fix.php?id=72819&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=72819&r=php4
Daylight Savings:           https://bugs.php.net/fix.php?id=72819&r=dst
IIS Stability:              https://bugs.php.net/fix.php?id=72819&r=isapi
Install GNU Sed:            https://bugs.php.net/fix.php?id=72819&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=72819&r=float
No Zend Extensions:         https://bugs.php.net/fix.php?id=72819&r=nozend
MySQL Configuration Error:  https://bugs.php.net/fix.php?id=72819&r=mysqlcfg

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