[PATCH v6 7/9] kselftest/arm64/mte: add verification for address tag in signal handler

[Yeoreum Yun]

Hi Mark,

> On Wed, Jun 11, 2025 at 10:41:05AM +0100, Yeoreum Yun wrote:
> > Add the address tag [63:60] verification when synchronous mte fault is happen.
> > when signal handler is registered with SA_EXPOSE_TAGBITS,
> > address includes not only memory tag [59:56] but also address tag.
> > Therefore, when verify fault address location, remove both tags
>
> Reviewed-by: Mark Brown <broonie at kernel.org>

Thanks :D

> though if you're doing a new version there's minor stylistic stuff:
>
> >  		/* Compare the context for precise error */
> >  		else if (si->si_code == SEGV_MTESERR) {
> > +		 	if ((!mtefar_support && si_atag) || (si_atag != MT_FETCH_ATAG(cur_mte_cxt.trig_addr))) {
> > +			  ksft_print_msg("Invalid MTE synchronous exception caught for address tag! si_tag=%x, si_atag: %x\n", si_tag, si_atag);
> > +			  exit(KSFT_FAIL);
> > +			}
>
> Indentation seems off, also there's ksft_exit_fail_msg() but either way
> works.

I'll fix the indentation next round. Thanks to let me know.

--
Sincerely,
Yeoreum Yun