On Thu, Aug 20, 2020 at 01:36:17AM -0700, Nicolin Chen wrote: > Took a quick look -- the boundary_size is seemingly passed from > https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/tree/arch/powerpc/kernel/iommu.c#n240 > > boundary_size = ALIGN(dma_get_seg_boundary(dev) + 1, > 1 << tbl->it_page_shift); > > Looks like an overflow happens due to (ULONG_MAX + 1). Should > we fix here instead (or also)? Yes, please. I'll drop the patch again for now, but once we've got this sorted out I'll readd it.
