dirtycow kernel fs memory corruption

[fr0zenrain]

dirtycow can root,but can not mount the system partition,it seems destory the kernel page
dmesg show as follows
<2>[ 82.453104] EXT4-fs (mmcblk0p12): ext4_da_writepages: jbd2_start: 2048 pages, ino 283; err -30
<2>[ 87.463150] EXT4-fs (mmcblk0p12): ext4_da_writepages: jbd2_start: 2048 pages, ino 283; err -30
<2>[ 92.483165] EXT4-fs (mmcblk0p12): ext4_da_writepages: jbd2_start: 2048 pages, ino 283; err -30

some one met this problem?

[lucasa831]

try to give setuid and other run permission to some file at /data/local/tmp
just like
chmod 4777 /data/local/tmp/run-as
then you reboot and run it