Re: [syzbot] [crypto?] general protection fault in scatterwalk_copychunks (5)

[Nhat Pham]

On Tue, Dec 26, 2023 at 3:30 PM Chris Li <chrisl@xxxxxxxxxx> wrote:
>
> Again, sorry I was looking at the decompression side rather than the
> compression side. The compression side does not even offer a safe
> version of the compression function.
> That seems to be dangerous. It seems for now we should make the zswap
> roll back to 2 page buffer until we have a safe way to do compression
> without overwriting the output buffers.

Unfortunately, I think this is the way - at least until we rework the
crypto/compression API (if that's even possible?).
I still think the 2 page buffer is dumb, but it is what it is :(