[PATCH] net/virtio-user: fix leak when initialisation fails

[David Marchand]

Caught with ASan.
If initialising a virtio_user port fails, we may leak the ifname passed
via a devargs.

Fixes: 4214a1b493f2 ("net/virtio-user: support changing tap interface name")
Cc: stable at dpdk.org

Signed-off-by: David Marchand <david.marchand at redhat.com>
---
 drivers/net/virtio/virtio_user/virtio_user_dev.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/net/virtio/virtio_user/virtio_user_dev.c b/drivers/net/virtio/virtio_user/virtio_user_dev.c
index f46a131b5c..744f3c30d2 100644
--- a/drivers/net/virtio/virtio_user/virtio_user_dev.c
+++ b/drivers/net/virtio/virtio_user/virtio_user_dev.c
@@ -696,11 +696,7 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char *path, uint16_t queues,
 	dev->frontend_features = 0;
 	dev->unsupported_features = 0;
 	dev->backend_type = backend_type;
-
-	if (*ifname) {
-		dev->ifname = *ifname;
-		*ifname = NULL;
-	}
+	dev->ifname = *ifname;
 
 	if (virtio_user_dev_setup(dev) < 0) {
 		PMD_INIT_LOG(ERR, "(%s) backend set up fails", dev->path);
@@ -794,6 +790,7 @@ virtio_user_dev_init(struct virtio_user_dev *dev, char *path, uint16_t queues,
 		}
 	}
 
+	*ifname = NULL;
 	return 0;
 
 notify_uninit:
-- 
2.39.2