On Mon, Jan 11, 2016 at 4:51 AM, Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> wrote: > Currently we clear kasan_zero_page before __flush_tlb_all(). This > works with current implementation of native_flush_tlb[_global]() > because it doesn't cause do any writes to kasan shadow memory. > But any subtle change made in native_flush_tlb*() could break this. > Also current code seems doesn't work for paravirt guests (lguest). > > Only after the TLB flush we can be sure that kasan_zero_page is not > used as early shadow anymore (instrumented code will not write to it). > So it should cleared it only after the TLB flush. This seems to fix the issue with my patch set. Thanks. Tested-by: Andy Lutomirski <luto@xxxxxxxxxx> --Andy -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>