On Thu, Nov 16, 2023 at 10:04 AM Alexander Potapenko <glider@xxxxxxxxxx> wrote: > > On Wed, Nov 15, 2023 at 9:35 PM Ilya Leoshkevich <iii@xxxxxxxxxxxxx> wrote: > > > > The unwind code can read uninitialized frames. Furthermore, even in > > the good case, KMSAN does not emit shadow for backchains. Therefore > > disable it for the unwinding functions. > > > > Signed-off-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx> > > --- > > arch/s390/kernel/unwind_bc.c | 2 ++ > > 1 file changed, 2 insertions(+) > > > > diff --git a/arch/s390/kernel/unwind_bc.c b/arch/s390/kernel/unwind_bc.c > > index 0ece156fdd7c..7ecaab24783f 100644 > > --- a/arch/s390/kernel/unwind_bc.c > > +++ b/arch/s390/kernel/unwind_bc.c > > @@ -49,6 +49,7 @@ static inline bool is_final_pt_regs(struct unwind_state *state, > > READ_ONCE_NOCHECK(regs->psw.mask) & PSW_MASK_PSTATE; > > } > > > > +__no_kmsan_checks > > Please add some comments to the source file to back this annotation, > so that the intent is not lost in git history. Apart from that, Reviewed-by: Alexander Potapenko <glider@xxxxxxxxxx> -- Alexander Potapenko Software Engineer Google Germany GmbH Erika-Mann-Straße, 33 80636 München Geschäftsführer: Paul Manicle, Liana Sebastian Registergericht und -nummer: Hamburg, HRB 86891 Sitz der Gesellschaft: Hamburg
