Re: [PATCH v3 0/2] Fix minor LLM findings in zcrypt dd

[Heiko Carstens <hca@linux.ibm.com>]

On Thu, Oct 08, 2026 at 08:02:25PM +0200, Heiko Carstens wrote:
> On Tue, Oct 06, 2026 at 05:46:01PM +0200, Harald Freudenberger wrote:
> > Fix some minor LLM findings related to the zcrypt device driver.
> > 
> > Changelog:
> > v1: Two patches:
> >     - The first patch fixes a gap related to speculative execution
> >       with the domain index.
> >     - The second patch fixes a length/pointer check with parsing the
> >       FQ reply from a CCA card.
> > v2: Fix a complain from Sashiko about silently dropping invalid
> >     domains down to domain value 0. So now a explicit check makes
> >     sure domain is either AUTOSEL_DOM or in range 0...255.
> >     2nd patch unchanged.
> > v3: Well this spectre thing points out to be really wired. So here is
> >     again a rework claiming it shall protect against speculative
> >     execution with respect to the domain value.
> >     2nd patch unchanged.
> > 
> > Harald Freudenberger (2):
> >   s390/zcrypt: Guard domain index uses against speculative bypass
> >   s390/zcrypt: Fix out-of-bounds ptr advance in
> >     cca_query_crypto_facility()
> > 
> >  drivers/s390/crypto/zcrypt_api.c     | 35 ++++++++++++++++++++--------
> >  drivers/s390/crypto/zcrypt_ccamisc.c | 22 +++++++++++++++--
> >  2 files changed, 45 insertions(+), 12 deletions(-)
> 
> Fixed typed reported by Holger, and applied. Thanks!
        ^^^^^
typos... :)