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Commit 43db362d authored by Maciej Żenczykowski's avatar Maciej Żenczykowski Committed by David S. Miller
Browse files

net: get rid of some pointless casts to sockaddr 



The following 4 functions:
  move_addr_to_kernel
  move_addr_to_user
  verify_iovec
  verify_compat_iovec
are always effectively called with a sockaddr_storage.

Make this explicit by changing their signature.

This removes a large number of casts from sockaddr_storage to sockaddr.

Signed-off-by: default avatarMaciej Żenczykowski <maze@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8b2aaede

include/linux/socket.h

+2 −2
Original line number Diff line number Diff line
@@ -326,11 +326,11 @@ extern int csum_partial_copy_fromiovecend(unsigned char *kdata, 
					  int offset, 

					  unsigned int len, __wsum *csump);



extern int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr *address, int mode);

extern int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr_storage *address, int mode);

extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);

extern int memcpy_toiovecend(const struct iovec *v, unsigned char *kdata,

			     int offset, int len);

extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr);

extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr);

extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);



struct timespec;

include/net/compat.h

+1 −1
Original line number Diff line number Diff line
@@ -41,7 +41,7 @@ extern int compat_sock_get_timestampns(struct sock *, struct timespec __user *); 
#endif /* defined(CONFIG_COMPAT) */



extern int get_compat_msghdr(struct msghdr *, struct compat_msghdr __user *);

extern int verify_compat_iovec(struct msghdr *, struct iovec *, struct sockaddr *, int);

extern int verify_compat_iovec(struct msghdr *, struct iovec *, struct sockaddr_storage *, int);

extern asmlinkage long compat_sys_sendmsg(int,struct compat_msghdr __user *,unsigned);

extern asmlinkage long compat_sys_sendmmsg(int, struct compat_mmsghdr __user *,

					   unsigned, unsigned);

net/compat.c

+1 −1
Original line number Diff line number Diff line
@@ -79,7 +79,7 @@ int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg) 


/* I've named the args so it is easy to tell whose space the pointers are in. */

int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,

		   struct sockaddr *kern_address, int mode)

		   struct sockaddr_storage *kern_address, int mode)

{

	int tot_len;

net/core/iovec.c

+1 −1
Original line number Diff line number Diff line
@@ -35,7 +35,7 @@ 
 *	in any case.

 */



int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr *address, int mode)

int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr_storage *address, int mode)

{

	int size, ct, err;

net/socket.c

+14 −22
Original line number Diff line number Diff line
@@ -181,7 +181,7 @@ static DEFINE_PER_CPU(int, sockets_in_use); 
 *	invalid addresses -EFAULT is returned. On a success 0 is returned.

 */



int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr)

int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr)

{

	if (ulen < 0 || ulen > sizeof(struct sockaddr_storage))

		return -EINVAL;
@@ -209,7 +209,7 @@ int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr) 
 *	specified. Zero is returned for a success.

 */



static int move_addr_to_user(struct sockaddr *kaddr, int klen,

static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen,

			     void __user *uaddr, int __user *ulen)

{

	int err;
@@ -1449,7 +1449,7 @@ SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) 


	sock = sockfd_lookup_light(fd, &err, &fput_needed);

	if (sock) {

		err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address);

		err = move_addr_to_kernel(umyaddr, addrlen, &address);

		if (err >= 0) {

			err = security_socket_bind(sock,

						   (struct sockaddr *)&address,
@@ -1556,7 +1556,7 @@ SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, 
			err = -ECONNABORTED;

			goto out_fd;

		}

		err = move_addr_to_user((struct sockaddr *)&address,

		err = move_addr_to_user(&address,

					len, upeer_sockaddr, upeer_addrlen);

		if (err < 0)

			goto out_fd;
@@ -1605,7 +1605,7 @@ SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, 
	sock = sockfd_lookup_light(fd, &err, &fput_needed);

	if (!sock)

		goto out;

	err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address);

	err = move_addr_to_kernel(uservaddr, addrlen, &address);

	if (err < 0)

		goto out_put;
@@ -1645,7 +1645,7 @@ SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, 
	err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0);

	if (err)

		goto out_put;

	err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len);

	err = move_addr_to_user(&address, len, usockaddr, usockaddr_len);



out_put:

	fput_light(sock->file, fput_needed);
@@ -1677,7 +1677,7 @@ SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, 
		    sock->ops->getname(sock, (struct sockaddr *)&address, &len,

				       1);

		if (!err)

			err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr,

			err = move_addr_to_user(&address, len, usockaddr,

						usockaddr_len);

		fput_light(sock->file, fput_needed);

	}
@@ -1716,7 +1716,7 @@ SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, 
	msg.msg_controllen = 0;

	msg.msg_namelen = 0;

	if (addr) {

		err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address);

		err = move_addr_to_kernel(addr, addr_len, &address);

		if (err < 0)

			goto out_put;

		msg.msg_name = (struct sockaddr *)&address;
@@ -1779,7 +1779,7 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, 
	err = sock_recvmsg(sock, &msg, size, flags);



	if (err >= 0 && addr != NULL) {

		err2 = move_addr_to_user((struct sockaddr *)&address,

		err2 = move_addr_to_user(&address,

					 msg.msg_namelen, addr, addr_len);

		if (err2 < 0)

			err = err2;
@@ -1933,13 +1933,9 @@ static int __sys_sendmsg(struct socket *sock, struct msghdr __user *msg, 


	/* This will also move the address data into kernel space */

	if (MSG_CMSG_COMPAT & flags) {

		err = verify_compat_iovec(msg_sys, iov,

					  (struct sockaddr *)&address,

					  VERIFY_READ);

		err = verify_compat_iovec(msg_sys, iov, &address, VERIFY_READ);

	} else

		err = verify_iovec(msg_sys, iov,

				   (struct sockaddr *)&address,

				   VERIFY_READ);

		err = verify_iovec(msg_sys, iov, &address, VERIFY_READ);

	if (err < 0)

		goto out_freeiov;

	total_len = err;
@@ -2143,13 +2139,9 @@ static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg, 
	uaddr = (__force void __user *)msg_sys->msg_name;

	uaddr_len = COMPAT_NAMELEN(msg);

	if (MSG_CMSG_COMPAT & flags) {

		err = verify_compat_iovec(msg_sys, iov,

					  (struct sockaddr *)&addr,

					  VERIFY_WRITE);

		err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE);

	} else

		err = verify_iovec(msg_sys, iov,

				   (struct sockaddr *)&addr,

				   VERIFY_WRITE);

		err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE);

	if (err < 0)

		goto out_freeiov;

	total_len = err;
@@ -2166,7 +2158,7 @@ static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg, 
	len = err;



	if (uaddr != NULL) {

		err = move_addr_to_user((struct sockaddr *)&addr,

		err = move_addr_to_user(&addr,

					msg_sys->msg_namelen, uaddr,

					uaddr_len);

		if (err < 0)