tree 9c258040d8dce825dc6abf72f719670b09b54a14
parent 13c789a6b219aa23f917466c7e630566106b14c2
author Harald Freudenberger <freude@linux.vnet.ibm.com> 1389884471 +0100
committer Herbert Xu <herbert@gondor.apana.org.au> 1391089508 +0800

crypto: s390 - fix concurrency issue in aes-ctr mode

The aes-ctr mode uses one preallocated page without any concurrency
protection. When multiple threads run aes-ctr encryption or decryption
this can lead to data corruption.

The patch introduces locking for the page and a fallback solution with
slower en/decryption performance in concurrency situations.

Cc: stable@vger.kernel.org
Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>