On Mon, Mar 05, 2018 at 12:50:33PM -0800, Linus Torvalds wrote: > On Mon, Mar 5, 2018 at 12:38 PM, Brian Gerst <brgerst@xxxxxxxxx> wrote: > > > > There already is a test: single_step_syscall.c > > Ahh, good. So presumably Joerg actually did check it, just didn't even notice ;) Yeah, sort of. I ran the test, but it didn't catch the failure case in previous versions which was return to user with kernel-cr3 :) I could probably add some debug instrumentation to check for that in my future testing, as there is no NX protection in the user address-range for the kernel-cr3. Joerg -- 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>
