[RFC PATCH 13/13] vsock: fix bind() behaviour taking care of CID
From: Stefano Garzarella <sgarzare@redhat.com>
Date: 2019-09-27 11:28:50
Also in:
kvm, lkml, netdev
Subsystem:
networking [general], the rest, vm sockets (af_vsock) · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Stefano Garzarella
When we are looking for a socket bound to a specific address, we also have to take into account the CID. This patch is useful with multi-transports support because it allows the binding of the same port with different CID, and it prevents a connection to a wrong socket bound to the same port, but with different CID. Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> --- net/vmw_vsock/af_vsock.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index 750b62711b01..bffa6fa7b8e5 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c@@ -230,10 +230,16 @@ static struct sock *__vsock_find_bound_socket(struct sockaddr_vm *addr) { struct vsock_sock *vsk; - list_for_each_entry(vsk, vsock_bound_sockets(addr), bound_table) - if (addr->svm_port == vsk->local_addr.svm_port) + list_for_each_entry(vsk, vsock_bound_sockets(addr), bound_table) { + if (vsock_addr_equals_addr(addr, &vsk->local_addr)) return sk_vsock(vsk); + if (addr->svm_port == vsk->local_addr.svm_port && + (vsk->local_addr.svm_cid == VMADDR_CID_ANY || + addr->svm_cid == VMADDR_CID_ANY)) + return sk_vsock(vsk); + } + return NULL; }
--
2.21.0