On Sun, Mar 19, 2023 at 09:52:19PM +0300, Arseniy Krasnov wrote:
This prints WARN() and returns from stream dequeue callback when socket's
queue is empty, but 'rx_bytes' still non-zero.
Signed-off-by: Arseniy Krasnov <AVKrasnov@xxxxxxxxxxxxxx>
---
net/vmw_vsock/virtio_transport_common.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
index 3c75986e16c2..c35b03adad8d 100644
--- a/net/vmw_vsock/virtio_transport_common.c
+++ b/net/vmw_vsock/virtio_transport_common.c
@@ -388,6 +388,13 @@ virtio_transport_stream_do_dequeue(struct vsock_sock *vsk,
u32 free_space;
spin_lock_bh(&vvs->rx_lock);
+
+ if (skb_queue_empty(&vvs->rx_queue) && vvs->rx_bytes) {
+ WARN(1, "No skbuffs with non-zero 'rx_bytes'\n");
I would use WARN_ONCE, since we can't recover so we will flood the log.
And you can put the condition in the first argument, I mean something
like this:
if (WARN_ONCE(skb_queue_empty(&vvs->rx_queue) && vvs->rx_bytes,
"rx_queue is empty, but rx_bytes is non-zero\n")) {
Thanks,
Stefano
+ spin_unlock_bh(&vvs->rx_lock);
+ return err;
+ }
+
while (total < len && !skb_queue_empty(&vvs->rx_queue)) {
skb = skb_peek(&vvs->rx_queue);
--
2.25.1
