[PATCH bpf v2 3/4] vsock: Update msg_count on read_skb()
From: Michal Luczaj <hidden>
Date: 2024-10-13 16:27:22
Also in:
bpf
Subsystem:
networking [general], the rest, virtio and vhost vsock driver, virtio core, vm sockets (af_vsock) · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Stefan Hajnoczi, Stefano Garzarella, "Michael S. Tsirkin", Jason Wang, Eugenio Pérez
Dequeuing via vsock_transport::read_skb() left msg_count outdated, which
then confused SOCK_SEQPACKET recv(). Decrease the counter.
Fixes: 634f1a7110b4 ("vsock: support sockmap")
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Michal Luczaj <redacted>
---
net/vmw_vsock/virtio_transport_common.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
index 2e5ad96825cc0988c9e1b3f8a8bfcff2ef00a2b2..ccbd2bc0d2109aea4f19e79a0438f85893e1d89c 100644
--- a/net/vmw_vsock/virtio_transport_common.c
+++ b/net/vmw_vsock/virtio_transport_common.c@@ -1723,6 +1723,9 @@ int virtio_transport_read_skb(struct vsock_sock *vsk, skb_read_actor_t recv_acto } hdr = virtio_vsock_hdr(skb); + if (le32_to_cpu(hdr->flags) & VIRTIO_VSOCK_SEQ_EOM) + vvs->msg_count--; + virtio_transport_dec_rx_pkt(vvs, le32_to_cpu(hdr->len)); spin_unlock_bh(&vvs->rx_lock);
--
2.46.2