On Mon, Aug 19, 2019 at 07:44:20PM +0800, Walter Wu wrote: > __arm_v7s_unmap() call iopte_deref() to translate pyh_to_virt address, > but it will modify pointer tag into 0xff, so there is a false positive. > > When enable tag-based kasan, phys_to_virt() function need to rewrite > its original pointer tag in order to avoid kasan report an incorrect > memory corruption.
Hmm. Which tree did you see this on? We've recently queued a load of fixes in this area, but I /thought/ they were only needed after the support for 52-bit virtual addressing in the kernel. Will
