net: Convert proto_ops bind() callbacks to use sockaddr_unsized

Update all struct proto_ops bind() callback function prototypes from
"struct sockaddr *" to "struct sockaddr_unsized *" to avoid lying to the
compiler about object sizes. Calls into struct proto handlers gain casts
that will be removed in the struct proto conversion patch.

No binary changes expected.

Signed-off-by: Kees Cook <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

crypto/af_alg.c

···
 }
 EXPORT_SYMBOL_GPL(af_alg_release_parent);
 
-static int alg_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
+static int alg_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len)
 {
 	const u32 allowed = CRYPTO_ALG_KERN_DRIVER_ONLY;
 	struct sock *sk = sock->sk;

drivers/block/drbd/drbd_receiver.c

···
 	*  a free one dynamically.
 	*/
 	what = "bind before connect";
-	err = sock->ops->bind(sock, (struct sockaddr *) &src_in6, my_addr_len);
+	err = sock->ops->bind(sock, (struct sockaddr_unsized *) &src_in6, my_addr_len);
 	if (err < 0)
 		goto out;
 
···
 	drbd_setbufsize(s_listen, sndbuf_size, rcvbuf_size);
 
 	what = "bind before listen";
-	err = s_listen->ops->bind(s_listen, (struct sockaddr *)&my_addr, my_addr_len);
+	err = s_listen->ops->bind(s_listen, (struct sockaddr_unsized *)&my_addr, my_addr_len);
 	if (err < 0)
 		goto out;
 

drivers/infiniband/hw/erdma/erdma_cm.c

···
 	int ret;
 
 	sock_set_reuseaddr(s->sk);
-	ret = s->ops->bind(s, laddr, laddrlen);
+	ret = s->ops->bind(s, (struct sockaddr_unsized *)laddr, laddrlen);
 	if (ret)
 		return ret;
 	ret = s->ops->connect(s, raddr, raddrlen, flags);
···
 	if (ipv4_is_zeronet(laddr->sin_addr.s_addr))
 		s->sk->sk_bound_dev_if = dev->netdev->ifindex;
 
-	ret = s->ops->bind(s, (struct sockaddr *)laddr,
+	ret = s->ops->bind(s, (struct sockaddr_unsized *)laddr,
 			   sizeof(struct sockaddr_in));
 	if (ret)
 		goto error;

drivers/infiniband/sw/siw/siw_cm.c

···
 			return rv;
 	}
 
-	rv = s->ops->bind(s, laddr, size);
+	rv = s->ops->bind(s, (struct sockaddr_unsized *)laddr, size);
 	if (rv < 0)
 		return rv;
 
···
 				goto error;
 			}
 		}
-		rv = s->ops->bind(s, (struct sockaddr *)laddr,
+		rv = s->ops->bind(s, (struct sockaddr_unsized *)laddr,
 				  sizeof(struct sockaddr_in));
 	} else {
 		struct sockaddr_in6 *laddr = &to_sockaddr_in6(id->local_addr);
···
 				goto error;
 			}
 		}
-		rv = s->ops->bind(s, (struct sockaddr *)laddr,
+		rv = s->ops->bind(s, (struct sockaddr_unsized *)laddr,
 				  sizeof(struct sockaddr_in6));
 	}
 	if (rv) {

drivers/isdn/mISDN/l1oip_core.c

···
 	hc->sin_remote.sin_port = htons((unsigned short)hc->remoteport);
 
 	/* bind to incoming port */
-	if (socket->ops->bind(socket, (struct sockaddr *)&hc->sin_local,
+	if (socket->ops->bind(socket, (struct sockaddr_unsized *)&hc->sin_local,
 			      sizeof(hc->sin_local))) {
 		printk(KERN_ERR "%s: Failed to bind socket to port %d.\n",
 		       __func__, hc->localport);

drivers/isdn/mISDN/socket.c

···
 }
 
 static int
-data_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
+data_sock_bind(struct socket *sock, struct sockaddr_unsized *addr, int addr_len)
 {
 	struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
 	struct sock *sk = sock->sk;
···
 }
 
 static int
-base_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
+base_sock_bind(struct socket *sock, struct sockaddr_unsized *addr, int addr_len)
 {
 	struct sockaddr_mISDN *maddr = (struct sockaddr_mISDN *) addr;
 	struct sock *sk = sock->sk;

drivers/net/ppp/pptp.c

···
 	return NET_RX_DROP;
 }
 
-static int pptp_bind(struct socket *sock, struct sockaddr *uservaddr,
-	int sockaddr_len)
+static int pptp_bind(struct socket *sock, struct sockaddr_unsized *uservaddr,
+		     int sockaddr_len)
 {
 	struct sock *sk = sock->sk;
 	struct sockaddr_pppox *sp = (struct sockaddr_pppox *) uservaddr;

drivers/nvme/host/tcp.c

···
 	sk_set_memalloc(queue->sock->sk);
 
 	if (nctrl->opts->mask & NVMF_OPT_HOST_TRADDR) {
-		ret = kernel_bind(queue->sock, (struct sockaddr *)&ctrl->src_addr,
+		ret = kernel_bind(queue->sock, (struct sockaddr_unsized *)&ctrl->src_addr,
 			sizeof(ctrl->src_addr));
 		if (ret) {
 			dev_err(nctrl->device,

drivers/nvme/target/tcp.c

···
 	if (so_priority > 0)
 		sock_set_priority(port->sock->sk, so_priority);
 
-	ret = kernel_bind(port->sock, (struct sockaddr *)&port->addr,
+	ret = kernel_bind(port->sock, (struct sockaddr_unsized *)&port->addr,
 			sizeof(port->addr));
 	if (ret) {
 		pr_err("failed to bind port socket %d\n", ret);

drivers/target/iscsi/iscsi_target_login.c

···
 	sock_set_reuseaddr(sock->sk);
 	ip_sock_set_freebind(sock->sk);
 
-	ret = kernel_bind(sock, (struct sockaddr *)&np->np_sockaddr, len);
+	ret = kernel_bind(sock, (struct sockaddr_unsized *)&np->np_sockaddr, len);
 	if (ret < 0) {
 		pr_err("kernel_bind() failed: %d\n", ret);
 		goto fail;

drivers/xen/pvcalls-back.c

···
 	if (ret < 0)
 		goto out;
 
-	ret = inet_bind(map->sock, (struct sockaddr *)&req->u.bind.addr,
+	ret = inet_bind(map->sock, (struct sockaddr_unsized *)&req->u.bind.addr,
 			req->u.bind.len);
 	if (ret < 0)
 		goto out;

fs/afs/rxrpc.c

···
 	if (ret < 0)
 		pr_err("Couldn't create RxGK CM key: %d\n", ret);
 
-	ret = kernel_bind(socket, (struct sockaddr *) &srx, sizeof(srx));
+	ret = kernel_bind(socket, (struct sockaddr_unsized *) &srx, sizeof(srx));
 	if (ret == -EADDRINUSE) {
 		srx.transport.sin6.sin6_port = 0;
-		ret = kernel_bind(socket, (struct sockaddr *) &srx, sizeof(srx));
+		ret = kernel_bind(socket, (struct sockaddr_unsized *) &srx, sizeof(srx));
 	}
 	if (ret < 0)
 		goto error_2;
 
 	srx.srx_service = YFS_CM_SERVICE;
-	ret = kernel_bind(socket, (struct sockaddr *) &srx, sizeof(srx));
+	ret = kernel_bind(socket, (struct sockaddr_unsized *) &srx, sizeof(srx));
 	if (ret < 0)
 		goto error_2;
 

fs/dlm/lowcomms.c

···
 		make_sockaddr(&localaddr, port, &addr_len);
 
 		if (!i)
-			result = kernel_bind(sock, addr, addr_len);
+			result = kernel_bind(sock, (struct sockaddr_unsized *)addr, addr_len);
 		else
 			result = sock_bind_add(sock->sk, addr, addr_len);
 
···
 	memcpy(&src_addr, &dlm_local_addr[0], sizeof(src_addr));
 	make_sockaddr(&src_addr, 0, &addr_len);
 
-	result = kernel_bind(sock, (struct sockaddr *)&src_addr,
+	result = kernel_bind(sock, (struct sockaddr_unsized *)&src_addr,
 			     addr_len);
 	if (result < 0) {
 		/* This *may* not indicate a critical error */
···
 
 	/* Bind to our port */
 	make_sockaddr(&dlm_local_addr[0], dlm_config.ci_tcp_port, &addr_len);
-	return kernel_bind(sock, (struct sockaddr *)&dlm_local_addr[0],
+	return kernel_bind(sock, (struct sockaddr_unsized *)&dlm_local_addr[0],
 			   addr_len);
 }
 

fs/ocfs2/cluster/tcp.c

···
 	myaddr.sin_addr.s_addr = mynode->nd_ipv4_address;
 	myaddr.sin_port = htons(0); /* any port */
 
-	ret = sock->ops->bind(sock, (struct sockaddr *)&myaddr,
+	ret = sock->ops->bind(sock, (struct sockaddr_unsized *)&myaddr,
 			      sizeof(myaddr));
 	if (ret) {
 		mlog(ML_ERROR, "bind failed with %d at address %pI4\n",
···
 	INIT_WORK(&o2net_listen_work, o2net_accept_many);
 
 	sock->sk->sk_reuse = SK_CAN_REUSE;
-	ret = sock->ops->bind(sock, (struct sockaddr *)&sin, sizeof(sin));
+	ret = sock->ops->bind(sock, (struct sockaddr_unsized *)&sin, sizeof(sin));
 	if (ret < 0) {
 		printk(KERN_ERR "o2net: Error %d while binding socket at "
 		       "%pI4:%u\n", ret, &addr, ntohs(port)); 

fs/smb/client/connect.c

···
 		struct socket *socket = server->ssocket;
 
 		rc = kernel_bind(socket,
-				 (struct sockaddr *) &server->srcaddr,
+				 (struct sockaddr_unsized *) &server->srcaddr,
 				 sizeof(server->srcaddr));
 		if (rc < 0) {
 			struct sockaddr_in *saddr4;

fs/smb/server/transport_tcp.c

···
 	}
 
 	if (ipv4)
-		ret = kernel_bind(ksmbd_socket, (struct sockaddr *)&sin,
+		ret = kernel_bind(ksmbd_socket, (struct sockaddr_unsized *)&sin,
 				  sizeof(sin));
 	else
-		ret = kernel_bind(ksmbd_socket, (struct sockaddr *)&sin6,
+		ret = kernel_bind(ksmbd_socket, (struct sockaddr_unsized *)&sin6,
 				  sizeof(sin6));
 	if (ret) {
 		pr_err("Failed to bind socket: %d\n", ret);

include/linux/net.h

···
 	struct module	*owner;
 	int		(*release)   (struct socket *sock);
 	int		(*bind)	     (struct socket *sock,
-				      struct sockaddr *myaddr,
+				      struct sockaddr_unsized *myaddr,
 				      int sockaddr_len);
 	int		(*connect)   (struct socket *sock,
 				      struct sockaddr *vaddr,
···
 int kernel_recvmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec,
 		   size_t num, size_t len, int flags);
 
-int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen);
+int kernel_bind(struct socket *sock, struct sockaddr_unsized *addr, int addrlen);
 int kernel_listen(struct socket *sock, int backlog);
 int kernel_accept(struct socket *sock, struct socket **newsock, int flags);
 int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen,

include/net/inet_common.h

···
 int inet_listen(struct socket *sock, int backlog);
 int __inet_listen_sk(struct sock *sk, int backlog);
 void inet_sock_destruct(struct sock *sk);
-int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len);
+int inet_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len);
 int inet_bind_sk(struct sock *sk, struct sockaddr *uaddr, int addr_len);
 /* Don't allocate port at this moment, defer to connect. */
 #define BIND_FORCE_ADDRESS_NO_PORT	(1 << 0)

include/net/ipv6.h

···
 void inet6_cleanup_sock(struct sock *sk);
 void inet6_sock_destruct(struct sock *sk);
 int inet6_release(struct socket *sock);
-int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len);
+int inet6_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len);
 int inet6_bind_sk(struct sock *sk, struct sockaddr *uaddr, int addr_len);
 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
 		  int peer);

include/net/sock.h

···
  * Functions to fill in entries in struct proto_ops when a protocol
  * does not implement a particular function.
  */
-int sock_no_bind(struct socket *, struct sockaddr *, int);
+int sock_no_bind(struct socket *sock, struct sockaddr_unsized *saddr, int len);
 int sock_no_connect(struct socket *, struct sockaddr *, int, int);
 int sock_no_socketpair(struct socket *, struct socket *);
 int sock_no_accept(struct socket *, struct socket *, struct proto_accept_arg *);

net/9p/trans_fd.c

···
 			((struct sockaddr_in *)&stor)->sin_port = htons((ushort)port);
 		else
 			((struct sockaddr_in6 *)&stor)->sin6_port = htons((ushort)port);
-		err = kernel_bind(sock, (struct sockaddr *)&stor, sizeof(stor));
+		err = kernel_bind(sock, (struct sockaddr_unsized *)&stor, sizeof(stor));
 		if (err != -EADDRINUSE)
 			break;
 	}

net/appletalk/ddp.c

···
 }
 
 /* Set the address 'our end' of the connection */
-static int atalk_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
+static int atalk_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len)
 {
 	struct sockaddr_at *addr = (struct sockaddr_at *)uaddr;
 	struct sock *sk = sock->sk;

net/atm/pvc.c

···
 	return 0;
 }
 
-static int pvc_bind(struct socket *sock, struct sockaddr *sockaddr,
+static int pvc_bind(struct socket *sock, struct sockaddr_unsized *sockaddr,
 		    int sockaddr_len)
 {
 	struct sock *sk = sock->sk;
···
 static int pvc_connect(struct socket *sock, struct sockaddr *sockaddr,
 		       int sockaddr_len, int flags)
 {
-	return pvc_bind(sock, sockaddr, sockaddr_len);
+	return pvc_bind(sock, (struct sockaddr_unsized *)sockaddr, sockaddr_len);
 }
 
 static int pvc_setsockopt(struct socket *sock, int level, int optname,

net/atm/svc.c

···
 	return 0;
 }
 
-static int svc_bind(struct socket *sock, struct sockaddr *sockaddr,
+static int svc_bind(struct socket *sock, struct sockaddr_unsized *sockaddr,
 		    int sockaddr_len)
 {
 	DEFINE_WAIT(wait);

net/ax25/af_ax25.c

···
  *	that we've implemented support for SO_BINDTODEVICE. It is however small
  *	and trivially backward compatible.
  */
-static int ax25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
+static int ax25_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len)
 {
 	struct sock *sk = sock->sk;
 	struct full_sockaddr_ax25 *addr = (struct full_sockaddr_ax25 *)uaddr;

net/bluetooth/hci_sock.c

···
 }
 #endif
 
-static int hci_sock_bind(struct socket *sock, struct sockaddr *addr,
+static int hci_sock_bind(struct socket *sock, struct sockaddr_unsized *addr,
 			 int addr_len)
 {
 	struct sockaddr_hci haddr;

net/bluetooth/iso.c

···
 	return 0;
 }
 
-static int iso_sock_bind_bc(struct socket *sock, struct sockaddr *addr,
+static int iso_sock_bind_bc(struct socket *sock, struct sockaddr_unsized *addr,
 			    int addr_len)
 {
 	struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;
···
 	return err;
 }
 
-static int iso_sock_bind(struct socket *sock, struct sockaddr *addr,
+static int iso_sock_bind(struct socket *sock, struct sockaddr_unsized *addr,
 			 int addr_len)
 {
 	struct sockaddr_iso *sa = (struct sockaddr_iso *)addr;

net/bluetooth/l2cap_sock.c

···
 	return 0;
 }
 
-static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
+static int l2cap_sock_bind(struct socket *sock, struct sockaddr_unsized *addr, int alen)
 {
 	struct sock *sk = sock->sk;
 	struct l2cap_chan *chan = l2cap_pi(sk)->chan;

net/bluetooth/rfcomm/core.c

···
 	addr.l2_psm    = 0;
 	addr.l2_cid    = 0;
 	addr.l2_bdaddr_type = BDADDR_BREDR;
-	*err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr));
+	*err = kernel_bind(sock, (struct sockaddr_unsized *)&addr, sizeof(addr));
 	if (*err < 0)
 		goto failed;
 
···
 	addr.l2_psm    = cpu_to_le16(L2CAP_PSM_RFCOMM);
 	addr.l2_cid    = 0;
 	addr.l2_bdaddr_type = BDADDR_BREDR;
-	err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr));
+	err = kernel_bind(sock, (struct sockaddr_unsized *)&addr, sizeof(addr));
 	if (err < 0) {
 		BT_ERR("Bind failed %d", err);
 		goto failed;

net/bluetooth/rfcomm/sock.c

···
 	return 0;
 }
 
-static int rfcomm_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
+static int rfcomm_sock_bind(struct socket *sock, struct sockaddr_unsized *addr, int addr_len)
 {
 	struct sockaddr_rc sa;
 	struct sock *sk = sock->sk;

net/bluetooth/sco.c

···
 	return 0;
 }
 
-static int sco_sock_bind(struct socket *sock, struct sockaddr *addr,
+static int sco_sock_bind(struct socket *sock, struct sockaddr_unsized *addr,
 			 int addr_len)
 {
 	struct sockaddr_sco *sa = (struct sockaddr_sco *) addr;

net/can/isotp.c

···
 	return 0;
 }
 
-static int isotp_bind(struct socket *sock, struct sockaddr *uaddr, int len)
+static int isotp_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int len)
 {
 	struct sockaddr_can *addr = (struct sockaddr_can *)uaddr;
 	struct sock *sk = sock->sk;

net/can/j1939/socket.c

···
 	return 0;
 }
 
-static int j1939_sk_bind(struct socket *sock, struct sockaddr *uaddr, int len)
+static int j1939_sk_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int len)
 {
 	struct sockaddr_can *addr = (struct sockaddr_can *)uaddr;
 	struct j1939_sock *jsk = j1939_sk(sock->sk);

net/can/raw.c

···
 	return 0;
 }
 
-static int raw_bind(struct socket *sock, struct sockaddr *uaddr, int len)
+static int raw_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int len)
 {
 	struct sockaddr_can *addr = (struct sockaddr_can *)uaddr;
 	struct sock *sk = sock->sk;

net/core/sock.c

···
  * function, some default processing is provided.
  */
 
-int sock_no_bind(struct socket *sock, struct sockaddr *saddr, int len)
+int sock_no_bind(struct socket *sock, struct sockaddr_unsized *saddr, int len)
 {
 	return -EOPNOTSUPP;
 }

net/ieee802154/socket.c

···
 	return sk->sk_prot->sendmsg(sk, msg, len);
 }
 
-static int ieee802154_sock_bind(struct socket *sock, struct sockaddr *uaddr,
+static int ieee802154_sock_bind(struct socket *sock, struct sockaddr_unsized *uaddr,
 				int addr_len)
 {
 	struct sock *sk = sock->sk;
 
 	if (sk->sk_prot->bind)
-		return sk->sk_prot->bind(sk, uaddr, addr_len);
+		return sk->sk_prot->bind(sk, (struct sockaddr *)uaddr, addr_len);
 
 	return sock_no_bind(sock, uaddr, addr_len);
 }

net/ipv4/af_inet.c

···
 	return __inet_bind(sk, uaddr, addr_len, flags);
 }
 
-int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
+int inet_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len)
 {
-	return inet_bind_sk(sock->sk, uaddr, addr_len);
+	return inet_bind_sk(sock->sk, (struct sockaddr *)uaddr, addr_len);
 }
 EXPORT_SYMBOL(inet_bind);
 

net/ipv4/udp_tunnel_core.c

···
 	udp_addr.sin_family = AF_INET;
 	udp_addr.sin_addr = cfg->local_ip;
 	udp_addr.sin_port = cfg->local_udp_port;
-	err = kernel_bind(sock, (struct sockaddr *)&udp_addr,
+	err = kernel_bind(sock, (struct sockaddr_unsized *)&udp_addr,
 			  sizeof(udp_addr));
 	if (err < 0)
 		goto error;

net/ipv6/af_inet6.c

···
 }
 
 /* bind for INET6 API */
-int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
+int inet6_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len)
 {
-	return inet6_bind_sk(sock->sk, uaddr, addr_len);
+	return inet6_bind_sk(sock->sk, (struct sockaddr *)uaddr, addr_len);
 }
 EXPORT_SYMBOL(inet6_bind);
 

net/ipv6/ip6_udp_tunnel.c

···
 	memcpy(&udp6_addr.sin6_addr, &cfg->local_ip6,
 	       sizeof(udp6_addr.sin6_addr));
 	udp6_addr.sin6_port = cfg->local_udp_port;
-	err = kernel_bind(sock, (struct sockaddr *)&udp6_addr,
+	err = kernel_bind(sock, (struct sockaddr_unsized *)&udp6_addr,
 			  sizeof(udp6_addr));
 	if (err < 0)
 		goto error;

net/iucv/af_iucv.c

···
 }
 
 /* Bind an unbound socket */
-static int iucv_sock_bind(struct socket *sock, struct sockaddr *addr,
+static int iucv_sock_bind(struct socket *sock, struct sockaddr_unsized *addr,
 			  int addr_len)
 {
 	DECLARE_SOCKADDR(struct sockaddr_iucv *, sa, addr);

net/l2tp/l2tp_core.c

···
 			memcpy(&ip6_addr.l2tp_addr, cfg->local_ip6,
 			       sizeof(ip6_addr.l2tp_addr));
 			ip6_addr.l2tp_conn_id = tunnel_id;
-			err = kernel_bind(sock, (struct sockaddr *)&ip6_addr,
+			err = kernel_bind(sock, (struct sockaddr_unsized *)&ip6_addr,
 					  sizeof(ip6_addr));
 			if (err < 0)
 				goto out;
···
 			ip_addr.l2tp_family = AF_INET;
 			ip_addr.l2tp_addr = cfg->local_ip;
 			ip_addr.l2tp_conn_id = tunnel_id;
-			err = kernel_bind(sock, (struct sockaddr *)&ip_addr,
+			err = kernel_bind(sock, (struct sockaddr_unsized *)&ip_addr,
 					  sizeof(ip_addr));
 			if (err < 0)
 				goto out;

net/llc/af_llc.c

···
  *	otherwise all hell will break loose.
  *	Returns: 0 upon success, negative otherwise.
  */
-static int llc_ui_bind(struct socket *sock, struct sockaddr *uaddr, int addrlen)
+static int llc_ui_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addrlen)
 {
 	struct sockaddr_llc *addr = (struct sockaddr_llc *)uaddr;
 	struct sock *sk = sock->sk;

net/mctp/af_mctp.c

···
 	       !addr->__smctp_pad0[2];
 }
 
-static int mctp_bind(struct socket *sock, struct sockaddr *addr, int addrlen)
+static int mctp_bind(struct socket *sock, struct sockaddr_unsized *addr, int addrlen)
 {
 	struct sock *sk = sock->sk;
 	struct mctp_sock *msk = container_of(sk, struct mctp_sock, sk);

net/mctp/test/route-test.c

···
 	addr.smctp_network = netid;
 	addr.smctp_addr.s_addr = 8;
 	addr.smctp_type = 0;
-	rc = kernel_bind(sock, (struct sockaddr *)&addr, sizeof(addr));
+	rc = kernel_bind(sock, (struct sockaddr_unsized *)&addr, sizeof(addr));
 	KUNIT_ASSERT_EQ(test, rc, 0);
 
 	*devp = dev;

net/mptcp/protocol.c

···
 	.no_autobind	= true,
 };
 
-static int mptcp_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
+static int mptcp_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len)
 {
 	struct mptcp_sock *msk = mptcp_sk(sock->sk);
 	struct sock *ssk, *sk = sock->sk;
···
 	}
 
 	if (sk->sk_family == AF_INET)
-		err = inet_bind_sk(ssk, uaddr, addr_len);
+		err = inet_bind_sk(ssk, (struct sockaddr *)uaddr, addr_len);
 #if IS_ENABLED(CONFIG_MPTCP_IPV6)
 	else if (sk->sk_family == AF_INET6)
-		err = inet6_bind_sk(ssk, uaddr, addr_len);
+		err = inet6_bind_sk(ssk, (struct sockaddr *)uaddr, addr_len);
 #endif
 	if (!err)
 		mptcp_copy_inaddrs(sk, ssk);

net/mptcp/subflow.c

···
 		addrlen = sizeof(struct sockaddr_in6);
 #endif
 	ssk->sk_bound_dev_if = local->ifindex;
-	err = kernel_bind(sf, (struct sockaddr *)&addr, addrlen);
+	err = kernel_bind(sf, (struct sockaddr_unsized *)&addr, addrlen);
 	if (err) {
 		MPTCP_INC_STATS(sock_net(sk), MPTCP_MIB_JOINSYNTXBINDERR);
 		pr_debug("msk=%p local=%d remote=%d bind error: %d\n",

net/netfilter/ipvs/ip_vs_sync.c

···
 	sin.sin_addr.s_addr  = addr;
 	sin.sin_port         = 0;
 
-	return kernel_bind(sock, (struct sockaddr *)&sin, sizeof(sin));
+	return kernel_bind(sock, (struct sockaddr_unsized *)&sin, sizeof(sin));
 }
 
 static void get_mcast_sockaddr(union ipvs_sockaddr *sa, int *salen,
···
 
 	get_mcast_sockaddr(&mcast_addr, &salen, &ipvs->bcfg, id);
 	sock->sk->sk_bound_dev_if = dev->ifindex;
-	result = kernel_bind(sock, (struct sockaddr *)&mcast_addr, salen);
+	result = kernel_bind(sock, (struct sockaddr_unsized *)&mcast_addr, salen);
 	if (result < 0) {
 		pr_err("Error binding to the multicast addr\n");
 		goto error;

net/netlink/af_netlink.c

···
 			nlk->netlink_unbind(sock_net(sk), undo + 1);
 }
 
-static int netlink_bind(struct socket *sock, struct sockaddr *addr,
+static int netlink_bind(struct socket *sock, struct sockaddr_unsized *addr,
 			int addr_len)
 {
 	struct sock *sk = sock->sk;

net/netrom/af_netrom.c

···
 	return 0;
 }
 
-static int nr_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
+static int nr_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len)
 {
 	struct sock *sk = sock->sk;
 	struct nr_sock *nr = nr_sk(sk);

net/nfc/llcp_sock.c

···
 	.obj_size = sizeof(struct nfc_llcp_sock),
 };
 
-static int llcp_sock_bind(struct socket *sock, struct sockaddr *addr, int alen)
+static int llcp_sock_bind(struct socket *sock, struct sockaddr_unsized *addr, int alen)
 {
 	struct sock *sk = sock->sk;
 	struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk);
···
 	return ret;
 }
 
-static int llcp_raw_sock_bind(struct socket *sock, struct sockaddr *addr,
+static int llcp_raw_sock_bind(struct socket *sock, struct sockaddr_unsized *addr,
 			      int alen)
 {
 	struct sock *sk = sock->sk;

net/packet/af_packet.c

···
  *	Bind a packet socket to a device
  */
 
-static int packet_bind_spkt(struct socket *sock, struct sockaddr *uaddr,
+static int packet_bind_spkt(struct socket *sock, struct sockaddr_unsized *uaddr,
 			    int addr_len)
 {
 	struct sock *sk = sock->sk;
-	char name[sizeof(uaddr->sa_data_min) + 1];
+	struct sockaddr *sa = (struct sockaddr *)uaddr;
+	char name[sizeof(sa->sa_data_min) + 1];
 
 	/*
 	 *	Check legality
···
 	/* uaddr->sa_data comes from the userspace, it's not guaranteed to be
 	 * zero-terminated.
 	 */
-	memcpy(name, uaddr->sa_data, sizeof(uaddr->sa_data_min));
-	name[sizeof(uaddr->sa_data_min)] = 0;
+	memcpy(name, sa->sa_data, sizeof(sa->sa_data_min));
+	name[sizeof(sa->sa_data_min)] = 0;
 
 	return packet_do_bind(sk, name, 0, 0);
 }
 
-static int packet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
+static int packet_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len)
 {
 	struct sockaddr_ll *sll = (struct sockaddr_ll *)uaddr;
 	struct sock *sk = sock->sk;

net/phonet/socket.c

···
 
 static DEFINE_MUTEX(port_mutex);
 
-static int pn_socket_bind(struct socket *sock, struct sockaddr *addr, int len)
+static int pn_socket_bind(struct socket *sock, struct sockaddr_unsized *addr, int len)
 {
 	struct sock *sk = sock->sk;
 	struct pn_sock *pn = pn_sk(sk);
···
 	u8 saddr;
 
 	if (sk->sk_prot->bind)
-		return sk->sk_prot->bind(sk, addr, len);
+		return sk->sk_prot->bind(sk, (struct sockaddr *)addr, len);
 
 	if (len < sizeof(struct sockaddr_pn))
 		return -EINVAL;
···
 
 	memset(&sa, 0, sizeof(sa));
 	sa.spn_family = AF_PHONET;
-	err = pn_socket_bind(sock, (struct sockaddr *)&sa,
-				sizeof(struct sockaddr_pn));
+	err = pn_socket_bind(sock, (struct sockaddr_unsized *)&sa,
+			     sizeof(struct sockaddr_pn));
 	if (err != -EINVAL)
 		return err;
 	BUG_ON(!pn_port(pn_sk(sock->sk)->sobject));

net/qrtr/af_qrtr.c

···
 }
 
 /* Bind socket to specified sockaddr. */
-static int qrtr_bind(struct socket *sock, struct sockaddr *saddr, int len)
+static int qrtr_bind(struct socket *sock, struct sockaddr_unsized *saddr, int len)
 {
 	DECLARE_SOCKADDR(struct sockaddr_qrtr *, addr, saddr);
 	struct qrtr_sock *ipc = qrtr_sk(sock->sk);

net/qrtr/ns.c

···
 	sq.sq_port = QRTR_PORT_CTRL;
 	qrtr_ns.local_node = sq.sq_node;
 
-	ret = kernel_bind(qrtr_ns.sock, (struct sockaddr *)&sq, sizeof(sq));
+	ret = kernel_bind(qrtr_ns.sock, (struct sockaddr_unsized *)&sq, sizeof(sq));
 	if (ret < 0) {
 		pr_err("failed to bind to socket\n");
 		goto err_wq;

net/rds/bind.c

···
 	rs->rs_bound_addr = in6addr_any;
 }
 
-int rds_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
+int rds_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len)
 {
 	struct sock *sk = sock->sk;
 	struct rds_sock *rs = rds_sk_to_rs(sk);

net/rds/rds.h

···
 
 
 /* bind.c */
-int rds_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len);
+int rds_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len);
 void rds_remove_bound(struct rds_sock *rs);
 struct rds_sock *rds_find_bound(const struct in6_addr *addr, __be16 port,
 				__u32 scope_id);

net/rds/tcp_connect.c

···
 		addrlen = sizeof(sin);
 	}
 
-	ret = kernel_bind(sock, addr, addrlen);
+	ret = kernel_bind(sock, (struct sockaddr_unsized *)addr, addrlen);
 	if (ret) {
 		rdsdebug("bind failed with %d at address %pI6c\n",
 			 ret, &conn->c_laddr);

net/rds/tcp_listen.c

···
 		addr_len = sizeof(*sin);
 	}
 
-	ret = kernel_bind(sock, (struct sockaddr *)&ss, addr_len);
+	ret = kernel_bind(sock, (struct sockaddr_unsized *)&ss, addr_len);
 	if (ret < 0) {
 		rdsdebug("could not bind %s listener socket: %d\n",
 			 isv6 ? "IPv6" : "IPv4", ret);

net/rose/af_rose.c

···
 	return 0;
 }
 
-static int rose_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
+static int rose_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len)
 {
 	struct sock *sk = sock->sk;
 	struct rose_sock *rose = rose_sk(sk);

net/rxrpc/af_rxrpc.c

···
 /*
  * bind a local address to an RxRPC socket
  */
-static int rxrpc_bind(struct socket *sock, struct sockaddr *saddr, int len)
+static int rxrpc_bind(struct socket *sock, struct sockaddr_unsized *saddr, int len)
 {
 	struct sockaddr_rxrpc *srx = (struct sockaddr_rxrpc *)saddr;
 	struct rxrpc_local *local;

net/rxrpc/rxperf.c

···
 
 	ret = rxrpc_sock_set_security_keyring(socket->sk, rxperf_sec_keyring);
 
-	ret = kernel_bind(socket, (struct sockaddr *)&srx, sizeof(srx));
+	ret = kernel_bind(socket, (struct sockaddr_unsized *)&srx, sizeof(srx));
 	if (ret < 0)
 		goto error_2;
 

net/smc/af_smc.c

···
 	return sk;
 }
 
-int smc_bind(struct socket *sock, struct sockaddr *uaddr,
+int smc_bind(struct socket *sock, struct sockaddr_unsized *uaddr,
 	     int addr_len)
 {
 	struct sockaddr_in *addr = (struct sockaddr_in *)uaddr;

net/smc/smc.h

···
 void smc_release_cb(struct sock *sk);
 
 int smc_release(struct socket *sock);
-int smc_bind(struct socket *sock, struct sockaddr *uaddr,
+int smc_bind(struct socket *sock, struct sockaddr_unsized *uaddr,
 	     int addr_len);
 int smc_connect(struct socket *sock, struct sockaddr *addr,
 		int alen, int flags);

net/socket.c

···
 				   addrlen);
 	if (!err)
 		err = READ_ONCE(sock->ops)->bind(sock,
-						 (struct sockaddr *)address,
+						 (struct sockaddr_unsized *)address,
 						 addrlen);
 	return err;
 }
···
  *	Returns 0 or an error.
  */
 
-int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen)
+int kernel_bind(struct socket *sock, struct sockaddr_unsized *addr, int addrlen)
 {
 	struct sockaddr_storage address;
 
 	memcpy(&address, addr, addrlen);
 
-	return READ_ONCE(sock->ops)->bind(sock, (struct sockaddr *)&address,
+	return READ_ONCE(sock->ops)->bind(sock, (struct sockaddr_unsized *)&address,
 					  addrlen);
 }
 EXPORT_SYMBOL(kernel_bind);

net/sunrpc/clnt.c

···
 	switch (sap->sa_family) {
 	case AF_INET:
 		err = kernel_bind(sock,
-				(struct sockaddr *)&rpc_inaddr_loopback,
+				(struct sockaddr_unsized *)&rpc_inaddr_loopback,
 				sizeof(rpc_inaddr_loopback));
 		break;
 	case AF_INET6:
 		err = kernel_bind(sock,
-				(struct sockaddr *)&rpc_in6addr_loopback,
+				(struct sockaddr_unsized *)&rpc_in6addr_loopback,
 				sizeof(rpc_in6addr_loopback));
 		break;
 	default:

net/sunrpc/svcsock.c

···
 		ip6_sock_set_v6only(sock->sk);
 	if (type == SOCK_STREAM)
 		sock->sk->sk_reuse = SK_CAN_REUSE; /* allow address reuse */
-	error = kernel_bind(sock, sin, len);
+	error = kernel_bind(sock, (struct sockaddr_unsized *)sin, len);
 	if (error < 0)
 		goto bummer;
 

net/sunrpc/xprtsock.c

···
 	memcpy(&myaddr, &transport->srcaddr, transport->xprt.addrlen);
 	do {
 		rpc_set_port((struct sockaddr *)&myaddr, port);
-		err = kernel_bind(sock, (struct sockaddr *)&myaddr,
-				transport->xprt.addrlen);
+		err = kernel_bind(sock, (struct sockaddr_unsized *)&myaddr,
+				  transport->xprt.addrlen);
 		if (err == 0) {
 			if (transport->xprt.reuseport)
 				transport->srcport = port;

net/tipc/socket.c

···
 	return res;
 }
 
-static int tipc_bind(struct socket *sock, struct sockaddr *skaddr, int alen)
+static int tipc_bind(struct socket *sock, struct sockaddr_unsized *skaddr, int alen)
 {
 	struct tipc_uaddr *ua = (struct tipc_uaddr *)skaddr;
 	u32 atype = ua->addrtype;
···
 			return -EACCES;
 		}
 	}
-	return tipc_sk_bind(sock, skaddr, alen);
+	return tipc_sk_bind(sock, (struct sockaddr *)skaddr, alen);
 }
 
 /**

net/unix/af_unix.c

···
 }
 
 static int unix_release(struct socket *);
-static int unix_bind(struct socket *, struct sockaddr *, int);
+static int unix_bind(struct socket *, struct sockaddr_unsized *, int);
 static int unix_stream_connect(struct socket *, struct sockaddr *,
 			       int addr_len, int flags);
 static int unix_socketpair(struct socket *, struct socket *);
···
 	return err;
 }
 
-static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
+static int unix_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len)
 {
 	struct sockaddr_un *sunaddr = (struct sockaddr_un *)uaddr;
 	struct sock *sk = sock->sk;

net/vmw_vsock/af_vsock.c

···
 }
 
 static int
-vsock_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
+vsock_bind(struct socket *sock, struct sockaddr_unsized *addr, int addr_len)
 {
 	int err;
 	struct sock *sk;
···
 
 	sk = sock->sk;
 
-	if (vsock_addr_cast(addr, addr_len, &vm_addr) != 0)
+	if (vsock_addr_cast((struct sockaddr *)addr, addr_len, &vm_addr) != 0)
 		return -EINVAL;
 
 	lock_sock(sk);

net/x25/af_x25.c

···
 	return 0;
 }
 
-static int x25_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
+static int x25_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len)
 {
 	struct sock *sk = sock->sk;
 	struct sockaddr_x25 *addr = (struct sockaddr_x25 *)uaddr;

net/xdp/xsk.c

···
 	return xs->fq_tmp && xs->cq_tmp;
 }
 
-static int xsk_bind(struct socket *sock, struct sockaddr *addr, int addr_len)
+static int xsk_bind(struct socket *sock, struct sockaddr_unsized *addr, int addr_len)
 {
 	struct sockaddr_xdp *sxdp = (struct sockaddr_xdp *)addr;
 	struct sock *sk = sock->sk;

tools/testing/selftests/bpf/test_kmods/bpf_testmod.c

···
 		goto out;
 	}
 
-	err = kernel_bind(sock, (struct sockaddr *)&args->addr, args->addrlen);
+	err = kernel_bind(sock, (struct sockaddr_unsized *)&args->addr, args->addrlen);
 out:
 	mutex_unlock(&sock_lock);