diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2019-11-09 18:09:27 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-31 12:37:42 +0100 |
| commit | 50806c4aa26f941ef665bfd9c2d70a16d8d6e304 (patch) | |
| tree | b62eb37de9290647b579505cd8911f48c6921639 /drivers/crypto | |
| parent | c4fd0e76e47195b9096f7334102d5e115cd91feb (diff) | |
crypto: virtio - deal with unsupported input sizes
[ Upstream commit 19c5da7d4a2662e85ea67d2d81df57e038fde3ab ]
Return -EINVAL for input sizes that are not a multiple of the AES
block size, since they are not supported by our CBC chaining mode.
While at it, remove the pr_err() that reports unsupported key sizes
being used: we shouldn't spam the kernel log with that.
Fixes: dbaf0624ffa5 ("crypto: add virtio-crypto driver")
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Gonglei <arei.gonglei@huawei.com>
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/virtio/virtio_crypto_algs.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/crypto/virtio/virtio_crypto_algs.c b/drivers/crypto/virtio/virtio_crypto_algs.c index 5035b0dc1e40..e2231a1a05a1 100644 --- a/drivers/crypto/virtio/virtio_crypto_algs.c +++ b/drivers/crypto/virtio/virtio_crypto_algs.c @@ -110,8 +110,6 @@ virtio_crypto_alg_validate_key(int key_len, uint32_t *alg) *alg = VIRTIO_CRYPTO_CIPHER_AES_CBC; break; default: - pr_err("virtio_crypto: Unsupported key length: %d\n", - key_len); return -EINVAL; } return 0; @@ -485,6 +483,11 @@ static int virtio_crypto_ablkcipher_encrypt(struct ablkcipher_request *req) /* Use the first data virtqueue as default */ struct data_queue *data_vq = &vcrypto->data_vq[0]; + if (!req->nbytes) + return 0; + if (req->nbytes % AES_BLOCK_SIZE) + return -EINVAL; + vc_req->dataq = data_vq; vc_req->alg_cb = virtio_crypto_dataq_sym_callback; vc_sym_req->ablkcipher_ctx = ctx; @@ -505,6 +508,11 @@ static int virtio_crypto_ablkcipher_decrypt(struct ablkcipher_request *req) /* Use the first data virtqueue as default */ struct data_queue *data_vq = &vcrypto->data_vq[0]; + if (!req->nbytes) + return 0; + if (req->nbytes % AES_BLOCK_SIZE) + return -EINVAL; + vc_req->dataq = data_vq; vc_req->alg_cb = virtio_crypto_dataq_sym_callback; vc_sym_req->ablkcipher_ctx = ctx; |