cryptodev/vhost: allocate CryptoDevBackendVhost using g_mem0()

The function `vhost_dev_init()` expects the `struct vhost_dev`
(passed as a parameter) to be fully initialized. This is important
because some parts of the code check whether `vhost_dev->config_ops`
is NULL to determine if it has been set (e.g. later via
`vhost_dev_set_config_notifier`).

To ensure this initialization, it’s better to allocate the entire
`CryptoDevBackendVhost` structure (which includes `vhost_dev`) using
`g_mem0()`, following the same approach used for other vhost devices,
such as in `vhost_net_init()`.

Fixes: 042cea274c ("cryptodev: add vhost-user as a new cryptodev backend")
Cc: qemu-stable@nongnu.org
Reported-by: myluo24@m.fudan.edu.cn
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-Id: <20250211135523.101203-1-sgarzare@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 83cb18ac4500f3a14067b19408705068647cb0c5)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

diff --git a/backends/cryptodev-vhost.c b/backends/cryptodev-vhost.c
index 93523732f39ffdd4b53891a4d004ec53d5f202d8..5901b3ec4ce7b897c1cdbd79c04a211ae4a4cfbc 100644 (file)
--- a/backends/cryptodev-vhost.c
+++ b/backends/cryptodev-vhost.c
@@ -53,7 +53,7 @@ cryptodev_vhost_init(
     CryptoDevBackendVhost *crypto;
     Error *local_err = NULL;
 
-    crypto = g_new(CryptoDevBackendVhost, 1);
+    crypto = g_new0(CryptoDevBackendVhost, 1);
     crypto->dev.max_queues = 1;
     crypto->dev.nvqs = 1;
     crypto->dev.vqs = crypto->vqs;