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authorStefano Garzarella <sgarzare@redhat.com>2019-11-14 12:57:49 +0300
committerDavid S. Miller <davem@davemloft.net>2019-11-15 05:12:18 +0300
commit36c5b48b91ac56762ef87e4af76350ed50f119b5 (patch)
treeb647773d8a6e2ea023cfec82be93d32265a22b79 /net/vmw_vsock/af_vsock.c
parent6a2c0962105ae8ceba182c4f616e0e41d7755591 (diff)
downloadlinux-36c5b48b91ac56762ef87e4af76350ed50f119b5.tar.xz
vsock: fix bind() behaviour taking care of CID
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. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Jorgen Hansen <jhansen@vmware.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/vmw_vsock/af_vsock.c')
-rw-r--r--net/vmw_vsock/af_vsock.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/net/vmw_vsock/af_vsock.c b/net/vmw_vsock/af_vsock.c
index 5cb0ae42d916..cc8659838bf2 100644
--- a/net/vmw_vsock/af_vsock.c
+++ b/net/vmw_vsock/af_vsock.c
@@ -228,10 +228,16 @@ 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;
}