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

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

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!