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virtio-crypto: fix NULL pointer dereference in virtio_crypto_free_request 

Ensure op_info is not NULL in case of QCRYPTODEV_BACKEND_ALG_SYM algtype.

Fixes: 0e660a6f90 ("crypto: Introduce RSA algorithm")
Signed-off-by: Mauro Matteo Cascella <mcascell@redhat.com>
Reported-by: Yiming Tao <taoym@zju.edu.cn>
Message-Id: <20230509075317.1132301-1-mcascell@redhat.com>
Reviewed-by: Gonglei <arei.gonglei@huawei.com>
Reviewed-by: zhenwei pi<pizhenwei@bytedance.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
master
Mauro Matteo Cascella 2023-05-09 09:53:17 +02:00 committed by Michael S. Tsirkin
parent 1fac00f70b
commit 3e69908907
1 changed files with 10 additions and 8 deletions
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18
hw/virtio/virtio-crypto.c
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@ -476,15 +476,17 @@ static void virtio_crypto_free_request(VirtIOCryptoReq *req)
size_t max_len;
CryptoDevBackendSymOpInfo *op_info = req->op_info.u.sym_op_info;
max_len = op_info->iv_len +
op_info->aad_len +
op_info->src_len +
op_info->dst_len +
op_info->digest_result_len;
if (op_info) {
max_len = op_info->iv_len +
op_info->aad_len +
op_info->src_len +
op_info->dst_len +
op_info->digest_result_len;
/* Zeroize and free request data structure */
memset(op_info, 0, sizeof(*op_info) + max_len);
g_free(op_info);
/* Zeroize and free request data structure */
memset(op_info, 0, sizeof(*op_info) + max_len);
g_free(op_info);
}
} else if (req->flags == QCRYPTODEV_BACKEND_ALG_ASYM) {
CryptoDevBackendAsymOpInfo *op_info = req->op_info.u.asym_op_info;
if (op_info) {