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commitd07f951903upstream. When processing the last block, the s390 ctr code will always read a whole block, even if there isn't a whole block of data left. Fix this by using the actual length left and copy it into a buffer first for processing. Fixes:0200f3ecc1("crypto: s390 - add System z hardware support for CTR mode") Cc: <stable@vger.kernel.org> Reported-by: Guangwu Zhang <guazhang@redhat.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Reviewd-by: Harald Freudenberger <freude@de.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>