On Tue, Oct 24, 2023 at 10:17:42PM +0300, Alexandru Matei wrote:

Once VQs are filled with empty buffers and we kick the host, it can send
connection requests. If the_virtio_vsock is not initialized before,
replies are silently dropped and do not reach the host.

virtio_transport_send_pkt() can queue packets once the_virtio_vsock is
set, but they won't be processed until vsock->tx_run is set to true. We
queue vsock->send_pkt_work when initialization finishes to send those
packets queued earlier.

Fixes: 0deab087b16a ("vsock/virtio: use RCU to avoid use-after-free on the_virtio_vsock")
Signed-off-by: Alexandru Matei <redacted>
---
v4:
- moved queue_work for send_pkt_work in vqs_start and added comment explaining why
v3:
- renamed vqs_fill to vqs_start and moved tx_run initialization to it
- queued send_pkt_work at the end of initialization to send packets queued earlier
v2:
- split virtio_vsock_vqs_init in vqs_init and vqs_fill and moved
 the_virtio_vsock initialization after vqs_init

net/vmw_vsock/virtio_transport.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)

LGTM!

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>