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

Christoph Hellwig
2022-06-15T13:21:57Z

On Tue, Jun 14, 2022 at 04:50:22PM +0800, Qu Wenruo wrote:
> The same way as data?
>
> map-logical to find the location of a mirror, write 4 bytes of zero into
> the location, then call it a day.
>
> Although for metadata, you may want to choose a metadata that would
> definitely get read.
> Thus tree root is a good candidate.

And how do I find out the logic address of the tree root?