[PATCH net-next] vhost_net: add a missing error return

[Dan Carpenter <dan.carpenter@xxxxxxxxxx>]

We accidentally left out this error return so it leads to some use after
free bugs later on.

Fixes: 0a0be13b8fe2 ("vhost_net: batch submitting XDP buffers to underlayer sockets")
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index dd4e0a301635..1bff6bc8161a 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -1244,6 +1244,7 @@ static int vhost_net_open(struct inode *inode, struct file *f)
 		kfree(vqs);
 		kvfree(n);
 		kfree(queue);
+		return -ENOMEM;
 	}
 	n->vqs[VHOST_NET_VQ_TX].xdp = xdp;
 
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