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vsock: Update msg_count on read_skb()

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Dequeuing via vsock_transport::read_skb() left msg_count outdated, which
then confused SOCK_SEQPACKET recv(). Decrease the counter.

Fixes: 634f1a7110 ("vsock: support sockmap")
Signed-off-by: Michal Luczaj <mhal@rbox.co>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/bpf/20241013-vsock-fixes-for-redir-v2-3-d6577bbfe742@rbox.co
This commit is contained in:
Michal Luczaj 2024-10-13 18:26:41 +02:00 committed by Daniel Borkmann
parent 3543152f2d
commit 6dafde852d
1 changed files with 3 additions and 0 deletions
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3
net/vmw_vsock/virtio_transport_common.c
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@ -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);