net: pass a sockptr_t into ->setsockopt

Rework the remaining setsockopt code to pass a sockptr_t instead of a plain user pointer. This removes the last remaining set_fs(KERNEL_DS) outside of architecture specific code. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Stefan Schmidt <stefan@datenfreihafen.org> [ieee802154] Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: David S. Miller <davem@davemloft.net>
xanmod · Jul 24, 2020 · a7b75c5 · a7b75c5
1 parent d38d2b0
commit a7b75c5
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Showing 61 changed files with 246 additions and 258 deletions.
diff --git a/crypto/af_alg.c b/crypto/af_alg.c
@@ -197,8 +197,7 @@ static int alg_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 	return err;
 }
 
-static int alg_setkey(struct sock *sk, char __user *ukey,
-		      unsigned int keylen)
+static int alg_setkey(struct sock *sk, sockptr_t ukey, unsigned int keylen)
 {
 	struct alg_sock *ask = alg_sk(sk);
 	const struct af_alg_type *type = ask->type;
@@ -210,7 +209,7 @@ static int alg_setkey(struct sock *sk, char __user *ukey,
 		return -ENOMEM;
 
 	err = -EFAULT;
-	if (copy_from_user(key, ukey, keylen))
+	if (copy_from_sockptr(key, ukey, keylen))
 		goto out;
 
 	err = type->setkey(ask->private, key, keylen);
@@ -222,7 +221,7 @@ static int alg_setkey(struct sock *sk, char __user *ukey,
 }
 
 static int alg_setsockopt(struct socket *sock, int level, int optname,
-			  char __user *optval, unsigned int optlen)
+			  sockptr_t optval, unsigned int optlen)
 {
 	struct sock *sk = sock->sk;
 	struct alg_sock *ask = alg_sk(sk);

diff --git a/drivers/crypto/chelsio/chtls/chtls_main.c b/drivers/crypto/chelsio/chtls/chtls_main.c
@@ -488,7 +488,7 @@ static int chtls_getsockopt(struct sock *sk, int level, int optname,
 }
 
 static int do_chtls_setsockopt(struct sock *sk, int optname,
-			       char __user *optval, unsigned int optlen)
+			       sockptr_t optval, unsigned int optlen)
 {
 	struct tls_crypto_info *crypto_info, tmp_crypto_info;
 	struct chtls_sock *csk;
@@ -498,12 +498,12 @@ static int do_chtls_setsockopt(struct sock *sk, int optname,
 
 	csk = rcu_dereference_sk_user_data(sk);
 
-	if (!optval || optlen < sizeof(*crypto_info)) {
+	if (sockptr_is_null(optval) || optlen < sizeof(*crypto_info)) {
 		rc = -EINVAL;
 		goto out;
 	}
 
-	rc = copy_from_user(&tmp_crypto_info, optval, sizeof(*crypto_info));
+	rc = copy_from_sockptr(&tmp_crypto_info, optval, sizeof(*crypto_info));
 	if (rc) {
 		rc = -EFAULT;
 		goto out;
@@ -525,8 +525,9 @@ static int do_chtls_setsockopt(struct sock *sk, int optname,
 		/* Obtain version and type from previous copy */
 		crypto_info[0] = tmp_crypto_info;
 		/* Now copy the following data */
-		rc = copy_from_user((char *)crypto_info + sizeof(*crypto_info),
-				optval + sizeof(*crypto_info),
+		sockptr_advance(optval, sizeof(*crypto_info));
+		rc = copy_from_sockptr((char *)crypto_info + sizeof(*crypto_info),
+				optval,
 				sizeof(struct tls12_crypto_info_aes_gcm_128)
 				- sizeof(*crypto_info));
 
@@ -541,8 +542,9 @@ static int do_chtls_setsockopt(struct sock *sk, int optname,
 	}
 	case TLS_CIPHER_AES_GCM_256: {
 		crypto_info[0] = tmp_crypto_info;
-		rc = copy_from_user((char *)crypto_info + sizeof(*crypto_info),
-				    optval + sizeof(*crypto_info),
+		sockptr_advance(optval, sizeof(*crypto_info));
+		rc = copy_from_sockptr((char *)crypto_info + sizeof(*crypto_info),
+				    optval,
 				sizeof(struct tls12_crypto_info_aes_gcm_256)
 				- sizeof(*crypto_info));
 
@@ -565,7 +567,7 @@ static int do_chtls_setsockopt(struct sock *sk, int optname,
 }
 
 static int chtls_setsockopt(struct sock *sk, int level, int optname,
-			    char __user *optval, unsigned int optlen)
+			    sockptr_t optval, unsigned int optlen)
 {
 	struct tls_context *ctx = tls_get_ctx(sk);
 

diff --git a/drivers/isdn/mISDN/socket.c b/drivers/isdn/mISDN/socket.c
@@ -401,7 +401,7 @@ data_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 }
 
 static int data_sock_setsockopt(struct socket *sock, int level, int optname,
-				char __user *optval, unsigned int len)
+				sockptr_t optval, unsigned int len)
 {
 	struct sock *sk = sock->sk;
 	int err = 0, opt = 0;
@@ -414,7 +414,7 @@ static int data_sock_setsockopt(struct socket *sock, int level, int optname,
 
 	switch (optname) {
 	case MISDN_TIME_STAMP:
-		if (get_user(opt, (int __user *)optval)) {
+		if (copy_from_sockptr(&opt, optval, sizeof(int))) {
 			err = -EFAULT;
 			break;
 		}

diff --git a/include/linux/net.h b/include/linux/net.h
@@ -21,6 +21,7 @@
 #include <linux/rcupdate.h>
 #include <linux/once.h>
 #include <linux/fs.h>
+#include <linux/sockptr.h>
 
 #include <uapi/linux/net.h>
 
@@ -162,7 +163,8 @@ struct proto_ops {
 	int		(*listen)    (struct socket *sock, int len);
 	int		(*shutdown)  (struct socket *sock, int flags);
 	int		(*setsockopt)(struct socket *sock, int level,
-				      int optname, char __user *optval, unsigned int optlen);
+				      int optname, sockptr_t optval,
+				      unsigned int optlen);
 	int		(*getsockopt)(struct socket *sock, int level,
 				      int optname, char __user *optval, int __user *optlen);
 	void		(*show_fdinfo)(struct seq_file *m, struct socket *sock);

diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
@@ -16,6 +16,7 @@
 #include <linux/timer.h>
 #include <linux/poll.h>
 #include <linux/kernel.h>
+#include <linux/sockptr.h>
 
 #include <net/inet_sock.h>
 #include <net/request_sock.h>
@@ -45,7 +46,7 @@ struct inet_connection_sock_af_ops {
 	u16	    net_frag_header_len;
 	u16	    sockaddr_len;
 	int	    (*setsockopt)(struct sock *sk, int level, int optname,
-				  char __user *optval, unsigned int optlen);
+				  sockptr_t optval, unsigned int optlen);
 	int	    (*getsockopt)(struct sock *sk, int level, int optname,
 				  char __user *optval, int __user *optlen);
 	void	    (*addr2sockaddr)(struct sock *sk, struct sockaddr *);

diff --git a/include/net/ip.h b/include/net/ip.h
@@ -722,7 +722,7 @@ void ip_cmsg_recv_offset(struct msghdr *msg, struct sock *sk,
 			 struct sk_buff *skb, int tlen, int offset);
 int ip_cmsg_send(struct sock *sk, struct msghdr *msg,
 		 struct ipcm_cookie *ipc, bool allow_ipv6);
-int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
+int ip_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
 		  unsigned int optlen);
 int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
 		  int __user *optlen);

diff --git a/include/net/ipv6.h b/include/net/ipv6.h
@@ -1084,8 +1084,8 @@ struct in6_addr *fl6_update_dst(struct flowi6 *fl6,
  *	socket options (ipv6_sockglue.c)
  */
 
-int ipv6_setsockopt(struct sock *sk, int level, int optname,
-		    char __user *optval, unsigned int optlen);
+int ipv6_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
+		    unsigned int optlen);
 int ipv6_getsockopt(struct sock *sk, int level, int optname,
 		    char __user *optval, int __user *optlen);
 

diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
@@ -431,7 +431,7 @@ struct sctp_af {
 	int		(*setsockopt)	(struct sock *sk,
 					 int level,
 					 int optname,
-					 char __user *optval,
+					 sockptr_t optval,
 					 unsigned int optlen);
 	int		(*getsockopt)	(struct sock *sk,
 					 int level,

diff --git a/include/net/sock.h b/include/net/sock.h
@@ -1141,7 +1141,7 @@ struct proto {
 	void			(*destroy)(struct sock *sk);
 	void			(*shutdown)(struct sock *sk, int how);
 	int			(*setsockopt)(struct sock *sk, int level,
-					int optname, char __user *optval,
+					int optname, sockptr_t optval,
 					unsigned int optlen);
 	int			(*getsockopt)(struct sock *sk, int level,
 					int optname, char __user *optval,
@@ -1734,7 +1734,7 @@ int sock_common_getsockopt(struct socket *sock, int level, int optname,
 int sock_common_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
 			int flags);
 int sock_common_setsockopt(struct socket *sock, int level, int optname,
-				  char __user *optval, unsigned int optlen);
+			   sockptr_t optval, unsigned int optlen);
 
 void sk_common_release(struct sock *sk);
 

diff --git a/include/net/tcp.h b/include/net/tcp.h
@@ -399,8 +399,8 @@ __poll_t tcp_poll(struct file *file, struct socket *sock,
 		      struct poll_table_struct *wait);
 int tcp_getsockopt(struct sock *sk, int level, int optname,
 		   char __user *optval, int __user *optlen);
-int tcp_setsockopt(struct sock *sk, int level, int optname,
-		   char __user *optval, unsigned int optlen);
+int tcp_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
+		   unsigned int optlen);
 void tcp_set_keepalive(struct sock *sk, int val);
 void tcp_syn_ack_timeout(const struct request_sock *req);
 int tcp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock,

diff --git a/net/atm/common.c b/net/atm/common.c
@@ -745,7 +745,7 @@ static int check_qos(const struct atm_qos *qos)
 }
 
 int vcc_setsockopt(struct socket *sock, int level, int optname,
-		   char __user *optval, unsigned int optlen)
+		   sockptr_t optval, unsigned int optlen)
 {
 	struct atm_vcc *vcc;
 	unsigned long value;
@@ -760,7 +760,7 @@ int vcc_setsockopt(struct socket *sock, int level, int optname,
 	{
 		struct atm_qos qos;
 
-		if (copy_from_user(&qos, optval, sizeof(qos)))
+		if (copy_from_sockptr(&qos, optval, sizeof(qos)))
 			return -EFAULT;
 		error = check_qos(&qos);
 		if (error)
@@ -774,7 +774,7 @@ int vcc_setsockopt(struct socket *sock, int level, int optname,
 		return 0;
 	}
 	case SO_SETCLP:
-		if (get_user(value, (unsigned long __user *)optval))
+		if (copy_from_sockptr(&value, optval, sizeof(value)))
 			return -EFAULT;
 		if (value)
 			vcc->atm_options |= ATM_ATMOPT_CLP;

diff --git a/net/atm/common.h b/net/atm/common.h
@@ -21,7 +21,7 @@ __poll_t vcc_poll(struct file *file, struct socket *sock, poll_table *wait);
 int vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
 int vcc_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
 int vcc_setsockopt(struct socket *sock, int level, int optname,
-		   char __user *optval, unsigned int optlen);
+		   sockptr_t optval, unsigned int optlen);
 int vcc_getsockopt(struct socket *sock, int level, int optname,
 		   char __user *optval, int __user *optlen);
 void vcc_process_recv_queue(struct atm_vcc *vcc);

diff --git a/net/atm/pvc.c b/net/atm/pvc.c
@@ -63,7 +63,7 @@ static int pvc_connect(struct socket *sock, struct sockaddr *sockaddr,
 }
 
 static int pvc_setsockopt(struct socket *sock, int level, int optname,
-			  char __user *optval, unsigned int optlen)
+			  sockptr_t optval, unsigned int optlen)
 {
 	struct sock *sk = sock->sk;
 	int error;

diff --git a/net/atm/svc.c b/net/atm/svc.c
@@ -451,7 +451,7 @@ int svc_change_qos(struct atm_vcc *vcc, struct atm_qos *qos)
 }
 
 static int svc_setsockopt(struct socket *sock, int level, int optname,
-			  char __user *optval, unsigned int optlen)
+			  sockptr_t optval, unsigned int optlen)
 {
 	struct sock *sk = sock->sk;
 	struct atm_vcc *vcc = ATM_SD(sock);
@@ -464,7 +464,7 @@ static int svc_setsockopt(struct socket *sock, int level, int optname,
 			error = -EINVAL;
 			goto out;
 		}
-		if (copy_from_user(&vcc->sap, optval, optlen)) {
+		if (copy_from_sockptr(&vcc->sap, optval, optlen)) {
 			error = -EFAULT;
 			goto out;
 		}
@@ -475,7 +475,7 @@ static int svc_setsockopt(struct socket *sock, int level, int optname,
 			error = -EINVAL;
 			goto out;
 		}
-		if (get_user(value, (int __user *)optval)) {
+		if (copy_from_sockptr(&value, optval, sizeof(int))) {
 			error = -EFAULT;
 			goto out;
 		}

diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
@@ -528,7 +528,7 @@ ax25_cb *ax25_create_cb(void)
  */
 
 static int ax25_setsockopt(struct socket *sock, int level, int optname,
-	char __user *optval, unsigned int optlen)
+		sockptr_t optval, unsigned int optlen)
 {
 	struct sock *sk = sock->sk;
 	ax25_cb *ax25;
@@ -543,7 +543,7 @@ static int ax25_setsockopt(struct socket *sock, int level, int optname,
 	if (optlen < sizeof(unsigned int))
 		return -EINVAL;
 
-	if (get_user(opt, (unsigned int __user *)optval))
+	if (copy_from_sockptr(&opt, optval, sizeof(unsigned int)))
 		return -EFAULT;
 
 	lock_sock(sk);
@@ -640,7 +640,7 @@ static int ax25_setsockopt(struct socket *sock, int level, int optname,
 
 		memset(devname, 0, sizeof(devname));
 
-		if (copy_from_user(devname, optval, optlen)) {
+		if (copy_from_sockptr(devname, optval, optlen)) {
 			res = -EFAULT;
 			break;
 		}

diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
@@ -1842,7 +1842,7 @@ static int hci_sock_sendmsg(struct socket *sock, struct msghdr *msg,
 }
 
 static int hci_sock_setsockopt(struct socket *sock, int level, int optname,
-			       char __user *optval, unsigned int len)
+			       sockptr_t optval, unsigned int len)
 {
 	struct hci_ufilter uf = { .opcode = 0 };
 	struct sock *sk = sock->sk;
@@ -1862,7 +1862,7 @@ static int hci_sock_setsockopt(struct socket *sock, int level, int optname,
 
 	switch (optname) {
 	case HCI_DATA_DIR:
-		if (get_user(opt, (int __user *)optval)) {
+		if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
 			err = -EFAULT;
 			break;
 		}
@@ -1874,7 +1874,7 @@ static int hci_sock_setsockopt(struct socket *sock, int level, int optname,
 		break;
 
 	case HCI_TIME_STAMP:
-		if (get_user(opt, (int __user *)optval)) {
+		if (copy_from_sockptr(&opt, optval, sizeof(opt))) {
 			err = -EFAULT;
 			break;
 		}
@@ -1896,7 +1896,7 @@ static int hci_sock_setsockopt(struct socket *sock, int level, int optname,
 		}
 
 		len = min_t(unsigned int, len, sizeof(uf));
-		if (copy_from_user(&uf, optval, len)) {
+		if (copy_from_sockptr(&uf, optval, len)) {
 			err = -EFAULT;
 			break;
 		}