[PATCH v2 0/1] Close speculative mem read possibility

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

The domain value is extracted from a given CCA or EP11 ioctl struct
when a CPRB is about to be sent. Thus this is a user controlled value.
Under some special conditions (custom device node used, administrative
load) this value is used as an array index after bounds checking, but
without speculation barrier.

Add the missing array_index_nospec() call to prevent speculative
execution where this domain value is used.

Changelog:
v1: initial version
v2: Rephrased patch header text, added Finn's Reviewed-by, no code changes.

Harald Freudenberger (1):
  s390/zcrypt: Close speculative mem read possibility

 drivers/s390/crypto/zcrypt_api.c | 2 ++
 1 file changed, 2 insertions(+)

-- 
2.43.0