net/vhost-vdpa: fix memory leak in vhost_vdpa_get_max_queue_pairs()

Use g_autofree to ensure that `config` is freed when
vhost_vdpa_get_max_queue_pairs() returns.

Reported-by: Coverity (CID 1465228: RESOURCE_LEAK)
Fixes: 402378407d ("vhost-vdpa: multiqueue support")
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-Id: <20211102155157.241034-1-sgarzare@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>

diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index 49ab322511aa704596e806f0e2f77b0011f192bf..373b706b907df3e7f304ca12f892634a2686458c 100644 (file)
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -214,7 +214,7 @@ static NetClientState *net_vhost_vdpa_init(NetClientState *peer,
 static int vhost_vdpa_get_max_queue_pairs(int fd, int *has_cvq, Error **errp)
 {
     unsigned long config_size = offsetof(struct vhost_vdpa_config, buf);
-    struct vhost_vdpa_config *config;
+    g_autofree struct vhost_vdpa_config *config = NULL;
     __virtio16 *max_queue_pairs;
     uint64_t features;
     int ret;