qemu: Fix CVE-2023-3180

qemu: Fix CVE-2023-3180

A flaw was found in the QEMU virtual crypto device while handling
data encryption/decryption requests in virtio_crypto_handle_sym_req.
There is no check for the value of `src_len` and `dst_len` in
virtio_crypto_sym_op_helper, potentially leading to a heap buffer
overflow when the two values differ.

References:
https://nvd.nist.gov/vuln/detail/CVE-2023-3180

Signed-off-by: Soumya Sambu <soumya.sambu@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>