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authorStefano Garzarella <sgarzare@redhat.com>2019-12-06 15:39:12 +0100
committerDavid S. Miller <davem@davemloft.net>2019-12-07 11:59:51 -0800
commit8a3cc29c316c17de590e3ff8b59f3d6cbfd37b0a (patch)
treec7a7a62ee049ad105dae9ec0ae6943549e375f34
parentfafc5db28a2ff39092bafe8ac9b8b19c4904f633 (diff)
downloadlinux-stericsson-8a3cc29c316c17de590e3ff8b59f3d6cbfd37b0a.tar.gz
vhost/vsock: accept only packets with the right dst_cid
When we receive a new packet from the guest, we check if the src_cid is correct, but we forgot to check the dst_cid. The host should accept only packets where dst_cid is equal to the host CID. Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/vhost/vsock.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c
index 50de0642dea6..c2d7d57e98cf 100644
--- a/drivers/vhost/vsock.c
+++ b/drivers/vhost/vsock.c
@@ -480,7 +480,9 @@ static void vhost_vsock_handle_tx_kick(struct vhost_work *work)
virtio_transport_deliver_tap_pkt(pkt);
/* Only accept correctly addressed packets */
- if (le64_to_cpu(pkt->hdr.src_cid) == vsock->guest_cid)
+ if (le64_to_cpu(pkt->hdr.src_cid) == vsock->guest_cid &&
+ le64_to_cpu(pkt->hdr.dst_cid) ==
+ vhost_transport_get_local_cid())
virtio_transport_recv_pkt(&vhost_transport, pkt);
else
virtio_transport_free_pkt(pkt);