Re: [syzbot] KASAN: use-after-free Read in disk_part_iter_next (2)

On 3/21/21 7:35 PM, Ming Lei wrote:

On Mon, Mar 22, 2021 at 7:03 AM Bart Van Assche [off-list ref] wrote:

quoted

On 3/14/21 4:08 AM, syzbot wrote:

quoted

syzbot found the following issue on:

HEAD commit:    280d542f Merge tag 'drm-fixes-2021-03-05' of git://anongit..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15ade5aed00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=952047a9dbff6a6a
dashboard link: https://syzkaller.appspot.com/bug?extid=8fede7e30c7cee0de139

#syz test: https://github.com/bvanassche/linux a5f35387ebdc

It should be the same issue which was addressed by

   aebf5db91705 block: fix use-after-free in disk_part_iter_next

but converting to xarray introduced the issue again.

Hi Ming,

Since that patch does not re-apply cleanly, do you want to convert that
patch to the latest kernel version or do you perhaps expect me to do that?

Thanks,

Bart.