linux-kernel - [PATCH 05/10] virtio/vsock: add copy_peercred() to virtio

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Date:   Thu, 21 Oct 2021 16:37:09 +0400
From:   Marc-André Lureau <marcandre.lureau@...hat.com>
To:     netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, sgarzare@...hat.com,
        davem@...emloft.net, kuba@...nel.org,
        Marc-André Lureau <marcandre.lureau@...hat.com>
Subject: [PATCH 05/10] virtio/vsock: add copy_peercred() to virtio_transport

Signed-off-by: Marc-André Lureau <marcandre.lureau@...hat.com>
---
 include/linux/virtio_vsock.h            | 2 ++
 net/vmw_vsock/virtio_transport_common.c | 9 +++++++++
 2 files changed, 11 insertions(+)

diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h
index 35d7eedb5e8e..2445bece9216 100644
--- a/include/linux/virtio_vsock.h
+++ b/include/linux/virtio_vsock.h
@@ -69,6 +69,8 @@ struct virtio_transport {
 
 	/* Takes ownership of the packet */
 	int (*send_pkt)(struct virtio_vsock_pkt *pkt);
+	/* Set peercreds on socket created after listen recv */
+	void (*copy_peercred)(struct sock *sk, struct virtio_vsock_pkt *pkt);
 };
 
 ssize_t
diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
index 59ee1be5a6dd..611d25e80723 100644
--- a/net/vmw_vsock/virtio_transport_common.c
+++ b/net/vmw_vsock/virtio_transport_common.c
@@ -1194,6 +1194,15 @@ virtio_transport_recv_listen(struct sock *sk, struct virtio_vsock_pkt *pkt,
 		return -ENOMEM;
 	}
 
+	if (t->copy_peercred) {
+		t->copy_peercred(child, pkt);
+	} else {
+		put_pid(child->sk_peer_pid);
+		child->sk_peer_pid = NULL;
+		put_cred(child->sk_peer_cred);
+		child->sk_peer_cred = NULL;
+	}
+
 	sk_acceptq_added(sk);
 
 	lock_sock_nested(child, SINGLE_DEPTH_NESTING);
-- 
2.33.0.721.g106298f7f9