diff mbox series

[bpf,v2,3/4] vsock: Update msg_count on read_skb()

Message ID 20241013-vsock-fixes-for-redir-v2-3-d6577bbfe742@rbox.co (mailing list archive)
State Accepted
Commit 6dafde852df8de3617d4b9f835b629aaeaccd01d
Delegated to: BPF
Headers show
Series bpf, vsock: Fixes related to sockmap/sockhash redirection | expand

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Commit Message

Michal Luczaj Oct. 13, 2024, 4:26 p.m. UTC 
Dequeuing via vsock_transport::read_skb() left msg_count outdated, which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 <mhal@rbox.co>
---
 net/vmw_vsock/virtio_transport_common.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

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);