crypto: qat - check cipher length for aead AES-CBC-HMAC-SHA

Return -EINVAL for authenc(hmac(sha1),cbc(aes)),
authenc(hmac(sha256),cbc(aes)) and authenc(hmac(sha512),cbc(aes))
if the cipher length is not multiple of the AES block.
This is to prevent an undefined device behaviour.

Fixes: d370cec32194 ("crypto: qat - Intel(R) QAT crypto interface")
Cc: <stable@vger.kernel.org>
Signed-off-by: Dominik Przychodni <dominik.przychodni@intel.com>
[giovanni.cabiddu@intel.com: reworded commit message]
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/drivers/crypto/qat/qat_common/qat_algs.c b/drivers/crypto/qat/qat_common/qat_algs.c
index 72753b8..d552dbc 100644 (file)
--- a/drivers/crypto/qat/qat_common/qat_algs.c
+++ b/drivers/crypto/qat/qat_common/qat_algs.c
@@ -828,6 +828,11 @@ static int qat_alg_aead_dec(struct aead_request *areq)
        struct icp_qat_fw_la_bulk_req *msg;
        int digst_size = crypto_aead_authsize(aead_tfm);
        int ret, ctr = 0;
+       u32 cipher_len;
+
+       cipher_len = areq->cryptlen - digst_size;
+       if (cipher_len % AES_BLOCK_SIZE != 0)
+               return -EINVAL;
 
        ret = qat_alg_sgl_to_bufl(ctx->inst, areq->src, areq->dst, qat_req);
        if (unlikely(ret))
@@ -842,7 +847,7 @@ static int qat_alg_aead_dec(struct aead_request *areq)
        qat_req->req.comn_mid.src_data_addr = qat_req->buf.blp;
        qat_req->req.comn_mid.dest_data_addr = qat_req->buf.bloutp;
        cipher_param = (void *)&qat_req->req.serv_specif_rqpars;
-       cipher_param->cipher_length = areq->cryptlen - digst_size;
+       cipher_param->cipher_length = cipher_len;
        cipher_param->cipher_offset = areq->assoclen;
        memcpy(cipher_param->u.cipher_IV_array, areq->iv, AES_BLOCK_SIZE);
        auth_param = (void *)((u8 *)cipher_param + sizeof(*cipher_param));
@@ -871,6 +876,9 @@ static int qat_alg_aead_enc(struct aead_request *areq)
        u8 *iv = areq->iv;
        int ret, ctr = 0;
 
+       if (areq->cryptlen % AES_BLOCK_SIZE != 0)
+               return -EINVAL;
+
        ret = qat_alg_sgl_to_bufl(ctx->inst, areq->src, areq->dst, qat_req);
        if (unlikely(ret))
                return ret;