On Wed, Jun 23, 2021 at 10:00:29PM +0300, Oded Gabbay wrote: > I understand the argument and I agree that for the generic case, the > top of the stack can't assume anything. > Having said that, in this case the SGL is encapsulated inside a dma-buf object. But the scatterlist is defined to have a valid page. If in dma-bufs you can't do that dmabufs are completely broken. Apparently the gpu folks can somehow live with that and deal with the pitfals, but for dma-buf users outside of their little fiefdom were they arbitrarily break rules it simply is not acceptable.
