Bug #66443 [Opn->Fbk]: Corrupt EXIF header: maximum directory nesting level reached for some cameras.

From: Date: Wed, 03 Aug 2016 10:00:58 +0000
Subject: Bug #66443 [Opn->Fbk]: Corrupt EXIF header: maximum directory nesting level reached for some cameras.
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-202871@lists.php.net to get a copy of this message 
Edit report at https://bugs.php.net/bug.php?id=66443&edit=1

 ID:                 66443
 Updated by:         kalle@php.net
 Reported by:        ianbeckett dot 0405 at gmail dot com
 Summary:            Corrupt EXIF header: maximum directory nesting level
                     reached for some cameras.
-Status:             Open
+Status:             Feedback
 Type:               Bug
 Package:            EXIF related
 Operating System:   Linux
 PHP Version:        5.5.7
 Block user comment: N
 Private report:     N

 New Comment:

Please try using this snapshot:

  http://snaps.php.net/php-trunk-latest.tar.gz
 
For Windows:

  http://windows.php.net/snapshots/

I just committed a fix for adding support for Panasonic formats, which involved increasing this
limit to 150, can you confirm this still works with that, or do you need it to be 200 for the
Fujifilm format to work?


Previous Comments:
------------------------------------------------------------------------
[2014-10-06 19:57:48] ianbeckett dot 0405 at gmail dot com

I don't know why a fix is not included, it seems to be a very straightforward change with no
side-effects.

I have been applying the fix I described originally every time I upgrade php and it works very well.

------------------------------------------------------------------------
[2014-10-06 11:45:32] deemoos at live dot nl

Why is there no fix included in new PHP versions?

------------------------------------------------------------------------
[2014-08-22 10:15:42] hello at wentsch dot me

Thanks for your patch, took me a while to figure out it's a problem with the EXIF produced by
my camera, which is a Fujifilm X10 fyi.

------------------------------------------------------------------------
[2014-01-08 19:42:41] ianbeckett dot 0405 at gmail dot com

Description:
------------
EXIF data from certain cameras is not read correctly by exif_read_data(), it fails part way through
with the error "Corrupt EXIF header: maximum directory nesting level reached".

My camera is a Fujifilm F770EXR and the two links below are additional reports of the same problem
with Fujifilm cameras. I don't know if any other makes are affected.

http://stackoverflow.com/questions/11584238/php-corrupt-exif-data-error-with-fulifilm-photos

http://stackoverflow.com/questions/10075066/issues-extracting-exif-data-for-exif-2-3-using-php-version-5-2-9

I think the problem is due to the amount of extra tags Fujifilm include, causing the code in exif.c
to think the header is corrupt before it finishes reading it all.

I think it can be fixed by increasing the value of MAX_IFD_NESTING_LEVEL defined in ext/exif/exif.c.
I used a value of 200 and it appears to have resolved the problem on my installation.






------------------------------------------------------------------------



--
Edit this bug report at https://bugs.php.net/bug.php?id=66443&edit=1

Thread (9 messages)

« previous php.bugs (#202871) next »