#28639 [Fbk->NoF]: imageCreateFromGif infinite loop. max processor

ID: 28639 Updated by: php-bugs@lists.php.net Reported By: jim at bluedojo dot com -Status: Feedback +Status: No Feedback Bug Type: GD related Operating System: Windows XP PHP Version: 4.3.7 New Comment: No feedback was provided for this bug for over a week, so it is being suspended automatically. If you are able to provide the information that was originally requested, please do so and change the status of the bug back to "Open". Previous Comments: ------------------------------------------------------------------------ [2005-01-14 18:51:50] sniper@php.net Please try using this CVS snapshot: http://snaps.php.net/php4-STABLE-latest.tar.gz For Windows: http://snaps.php.net/win32/php4-win32-STABLE-latest.zip Can not reproduce. ------------------------------------------------------------------------ [2004-06-18 17:15:21] scottmacvicar at ntlworld dot com Problem is in GetDataBlock_ it doesn't even return -1 so constantly loops within the end code handling part of LWZReadByte_ while ((count = GetDataBlock(fd, buf)) > 0) is the loop in question in libgd/gd_gif_in.c I dont have enough time to see whats wrong with that function but its there its looping. ------------------------------------------------------------------------ [2004-06-15 12:45:03] iridium at beyondunreal dot com I have reproduced this bug using php -r "imagecreatefromgif('http://members.tripod.com/~TyroneZero/drstrangelove.gif');" on both windows xp in PHP 5.0.0rc2 and linux with 4.3.6 (both command line). The above command causes it to hang. Tracing through the code using a debugger it does look a lot like an infinate loop, though it could just be a really long one. I believe the infinate loop starts at line 155 in gd_gif_in.c at for (;;) { - I think it may just not be reaching an exit condition. I may investigate more later. Very strangely, if I download the gif and run the same command without going to the site at runtime, there is no such problem. Irid. ------------------------------------------------------------------------ [2004-06-14 14:02:11] vrana@php.net It seems this is Windows specific issue caused most probably by php_gd2.dll. ------------------------------------------------------------------------ [2004-06-06 20:04:26] jim at bluedojo dot com Yes, the images are corrupt. I believe that is why the function imageCreateFromGif() is going into an infinite loop. I need to have the function just exit and not loop infinitely. When I run the php page from the command line it goes into an infinite loop. When I load the php page from an Apache web server, it causes Apache to stall infinitely. My processor maxes out and I have to go to the Windows Task Menu to cancel the process. I am running the following: Windows XP Apache/1.3.28 PHP/4.3.7 GD library is turned on in php.ini Any help would be greatful. Thanks. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at http://bugs.php.net/28639 -- Edit this bug report at http://bugs.php.net/?id=28639&edit=1