On Mon, 21 Nov 2022 09:05:43 +0100 David Hildenbrand <david@xxxxxxxxxx> wrote: > >> MikeK do you have test cases? > > > > Sorry, I do not have any test cases. > > > > I can ask one of our product groups about their usage. But, that would > > certainly not be a comprehensive view. > > With > > https://lkml.kernel.org/r/20221116102659.70287-1-david@xxxxxxxxxx > > on it's way, the RDMA concern should be gone, hopefully. > > @Andrew, can you queue this one? Thanks. This is all a little tricky. It's not good that 6.0 and earlier permit unprivileged userspace to trigger a WARN. But we cannot backport this fix into earlier kernels because it requires the series "mm/gup: remove FOLL_FORCE usage from drivers (reliable R/O long-term pinning)". Is it possible to come up with a fix for 6.1 and earlier which won't break RDMA?
