On Wed, Mar 25, 2020 at 10:57:02PM -0700, Kees Cook wrote: > > In the meantime I can still change objtool to ignore unreachable UD2s if > > there aren't any better ideas. > > It'll still need the objtool change for CONFIG_UBSAN_TRAP, though based on > the clang bug discussion, I'll probably _also_ be adding CONFIG_UBSAN_WARN > which won't have an unreachable (and won't bloat the kernel). Testing > still under way... it is possible that CONFIG_UBSAN_TRAP will go away > in the future, though. If that happens, should I also remove the change > at that time? I'll go ahead and make the patch and post it soon. It should be pretty trivial. We can always revert it if CONFIG_UBSAN_TRAP goes away. -- Josh
