|Summary:||ext4_block_to_path block too big cause cpu to burn|
|Product:||File System||Reporter:||David Maciejak (dmaciejak)|
|Component:||ext4||Assignee:||Theodore Tso (tytso)|
kernel log extract
ext4 image poc
Patch to address this bug
Description David Maciejak 2009-01-07 02:56:33 UTC
Latest working kernel version: none Earliest failing kernel version: unknow Distribution: ubuntu Hardware Environment: dell optiplex 740 Software Environment: Problem Description: 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 Regards, David Maciejak Fortinet's FortiGuard Global Security Research Team
Comment 1 David Maciejak 2009-01-07 02:57:13 UTC
Created attachment 19685 [details] kernel log extract
Comment 3 Theodore Tso 2009-01-17 15:44:48 UTC
Created attachment 19872 [details] Patch to address this bug This patch should address this bug. Thanks for reporting it!
Comment 4 Theodore Tso 2009-02-03 11:20:31 UTC
This patch has been merged into the Linux mainline and will be 2.6.29-rc4 and newer releases.