My bad. I mistakenly omitted to and cc for the cover letter. Fixed. On Thu, Mar 10, 2022 at 9:55 PM Michael S. Tsirkin <mst@xxxxxxxxxx> wrote: > > On Thu, Mar 10, 2022 at 07:53:25AM -0500, Michael S. Tsirkin wrote: > > This message had > > In-Reply-To: <20220310124936.4179591-1-jiyong@xxxxxxxxxx> > > in its header but 20220310124936.4179591-2-jiyong@xxxxxxxxxx was > > not sent to the list. > > Please don't do that. Instead, please write and send a proper > > cover letter. Thanks! > > > > > Also, pls version in subject e.g. PATCH v2, and include > full changelog in the cover letter. Thanks! > > > On Thu, Mar 10, 2022 at 09:49:35PM +0900, Jiyong Park wrote: > > > When iterating over sockets using vsock_for_each_connected_socket, make > > > sure that a transport filters out sockets that don't belong to the > > > transport. > > > > > > There actually was an issue caused by this; in a nested VM > > > configuration, destroying the nested VM (which often involves the > > > closing of /dev/vhost-vsock if there was h2g connections to the nested > > > VM) kills not only the h2g connections, but also all existing g2h > > > connections to the (outmost) host which are totally unrelated. > > > > > > Tested: Executed the following steps on Cuttlefish (Android running on a > > > VM) [1]: (1) Enter into an `adb shell` session - to have a g2h > > > connection inside the VM, (2) open and then close /dev/vhost-vsock by > > > `exec 3< /dev/vhost-vsock && exec 3<&-`, (3) observe that the adb > > > session is not reset. > > > > > > [1] https://android.googlesource.com/device/google/cuttlefish/ > > > > > > Fixes: c0cfa2d8a788 ("vsock: add multi-transports support") > > > Signed-off-by: Jiyong Park <jiyong@xxxxxxxxxx> > > > --- > > > drivers/vhost/vsock.c | 4 ++++ > > > net/vmw_vsock/virtio_transport.c | 7 +++++++ > > > net/vmw_vsock/vmci_transport.c | 5 +++++ > > > 3 files changed, 16 insertions(+) > > > > > > diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c > > > index 37f0b4274113..853ddac00d5b 100644 > > > --- a/drivers/vhost/vsock.c > > > +++ b/drivers/vhost/vsock.c > > > @@ -722,6 +722,10 @@ static void vhost_vsock_reset_orphans(struct sock *sk) > > > * executing. > > > */ > > > > > > + /* Only handle our own sockets */ > > > + if (vsk->transport != &vhost_transport.transport) > > > + return; > > > + > > > /* If the peer is still valid, no need to reset connection */ > > > if (vhost_vsock_get(vsk->remote_addr.svm_cid)) > > > return; > > > diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c > > > index fb3302fff627..61b24eb31d4b 100644 > > > --- a/net/vmw_vsock/virtio_transport.c > > > +++ b/net/vmw_vsock/virtio_transport.c > > > @@ -24,6 +24,7 @@ > > > static struct workqueue_struct *virtio_vsock_workqueue; > > > static struct virtio_vsock __rcu *the_virtio_vsock; > > > static DEFINE_MUTEX(the_virtio_vsock_mutex); /* protects the_virtio_vsock */ > > > +static struct virtio_transport virtio_transport; /* forward declaration */ > > > > > > struct virtio_vsock { > > > struct virtio_device *vdev; > > > @@ -357,11 +358,17 @@ static void virtio_vsock_event_fill(struct virtio_vsock *vsock) > > > > > > static void virtio_vsock_reset_sock(struct sock *sk) > > > { > > > + struct vsock_sock *vsk = vsock_sk(sk); > > > + > > > /* vmci_transport.c doesn't take sk_lock here either. At least we're > > > * under vsock_table_lock so the sock cannot disappear while we're > > > * executing. > > > */ > > > > > > + /* Only handle our own sockets */ > > > + if (vsk->transport != &virtio_transport.transport) > > > + return; > > > + > > > sk->sk_state = TCP_CLOSE; > > > sk->sk_err = ECONNRESET; > > > sk_error_report(sk); > > > diff --git a/net/vmw_vsock/vmci_transport.c b/net/vmw_vsock/vmci_transport.c > > > index 7aef34e32bdf..cd2f01513fae 100644 > > > --- a/net/vmw_vsock/vmci_transport.c > > > +++ b/net/vmw_vsock/vmci_transport.c > > > @@ -803,6 +803,11 @@ static void vmci_transport_handle_detach(struct sock *sk) > > > struct vsock_sock *vsk; > > > > > > vsk = vsock_sk(sk); > > > + > > > + /* Only handle our own sockets */ > > > + if (vsk->transport != &vmci_transport) > > > + return; > > > + > > > if (!vmci_handle_is_invalid(vmci_trans(vsk)->qp_handle)) { > > > sock_set_flag(sk, SOCK_DONE); > > > > > > -- > > > 2.35.1.723.g4982287a31-goog >
