On Wed, Aug 28, 2019 at 10:56:25AM -0700, Randy Dunlap wrote: > >> drivers/xen/gntdev.o: warning: objtool: gntdev_copy()+0x229: call to __ubsan_handle_out_of_bounds() with UACCESS enabled > > > > Easy one :-) > > > > diff --git a/tools/objtool/check.c b/tools/objtool/check.c > > index 0c8e17f946cd..6a935ab93149 100644 > > --- a/tools/objtool/check.c > > +++ b/tools/objtool/check.c > > @@ -483,6 +483,7 @@ static const char *uaccess_safe_builtin[] = { > > "ubsan_type_mismatch_common", > > "__ubsan_handle_type_mismatch", > > "__ubsan_handle_type_mismatch_v1", > > + "__ubsan_handle_out_of_bounds", > > /* misc */ > > "csum_partial_copy_generic", > > "__memcpy_mcsafe", > > > > > then I get this one: > > lib/ubsan.o: warning: objtool: __ubsan_handle_out_of_bounds()+0x5d: call to ubsan_prologue() with UACCESS enabled And of course I jinxed it by calling it easy. Peter, how do you want to handle this? Should we just disable UACCESS checking in lib/ubsan.c? -- Josh