[Stable-9.2.3,15/51] cryptodev/vhost: allocate CryptoDevBackendVhost using g_mem0()

Commit Message

Michael Tokarev March 15, 2025, 6:17 a.m. UTC

From: Stefano Garzarella <[e-mail]>

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: [e-mail]
Reported-by: [e-mail]
Signed-off-by: Stefano Garzarella <[e-mail]>
Message-Id: <[e-mail]>
Reviewed-by: Michael S. Tsirkin <[e-mail]>
Signed-off-by: Michael S. Tsirkin <[e-mail]>
(cherry picked from commit 83cb18ac4500f3a14067b19408705068647cb0c5)
Signed-off-by: Michael Tokarev <[e-mail]>

Patch

diff --git a/backends/cryptodev-vhost.c b/backends/cryptodev-vhost.c
index 93523732f3..5901b3ec4c 100644
--- 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;