Insufficient file size checks resulted in a denial of service risk in the file picker's unzip functionality.
https://moodle.org/mod/forum/discuss.php?d=455634
https://bugzilla.redhat.com/show_bug.cgi?id=2264074
http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-74641