[PATCH v5 0/2] Improve code in zcrypt msg type 6 handling

[Harald Freudenberger <freude@linux.ibm.com>]

Rework the limit and overflow checks in the both functions
xcrb_msg_to_type6_ep11cprb_msgx() and xcrb_msg_to_type6cprb_msgx().

Changelog:

v1: initial version, one patch dealing with overflow checks around
    the use of the CEIL4 macro in zcrypt_msgtype6.c
v2: Sashiko found a regression: The check
      if (ap_msg->len > ap_msg->bufsize)
    was missing in the rework. Added again this important check.
v3: - Split into two patches  - one for CCA one for EP11
    - rework upper limit/overflow check 
    - add lower limit check
v4: - tried to address all the remaining complains from sashiko.
v5: - Yea, sashiko still found out that the min req size needs
      to take the minimal payload header into account. Fixed.

Harald Freudenberger (2):
  s390/zcrypt: Improve CCA CPRB length and overflow checks
  s390/zcrypt: Improve EP11 CPRB length and overflow checks

 drivers/s390/crypto/zcrypt_msgtype6.c | 98 ++++++++++++++-------------
 1 file changed, 52 insertions(+), 46 deletions(-)

-- 
2.43.0