Latest working kernel version: none
Earliest failing kernel version: unknow
Hardware Environment: dell optiplex 740
when mounting specially crafted ext4 image, after some few seconds (5s), kern.log is filled with some data and cpu reaches 100%
Steps to reproduce:
bunzip the image file enclosed and mount the image with mount -t ext4 -o loop ext4.img /media/tmp
note: i also tried the 2.6.28-ext4-3 patch but it does not help
Fortinet's FortiGuard Global Security Research Team
Created attachment 19685 [details]
kernel log extract
Created attachment 19686 [details]
ext4 image poc
Created attachment 19872 [details]
Patch to address this bug
This patch should address this bug. Thanks for reporting it!
This patch has been merged into the Linux mainline and will be 2.6.29-rc4 and newer releases.