net: Use standard structures for generic socket address structures.
Use sockaddr_storage{} for generic socket address storage and ensures proper alignment. Use sockaddr{} for pointers to omit several casts. Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
53b7997fd5
commit
230b183921
5 changed files with 52 additions and 42 deletions
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@ -306,10 +306,10 @@ extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
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int offset,
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unsigned int len, __wsum *csump);
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extern int verify_iovec(struct msghdr *m, struct iovec *iov, char *address, int mode);
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extern int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr *address, int mode);
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extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);
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extern int move_addr_to_user(void *kaddr, int klen, void __user *uaddr, int __user *ulen);
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extern int move_addr_to_kernel(void __user *uaddr, int ulen, void *kaddr);
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extern int move_addr_to_user(struct sockaddr *kaddr, int klen, void __user *uaddr, int __user *ulen);
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extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr);
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extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
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#endif
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@ -32,7 +32,7 @@ extern int compat_sock_get_timestampns(struct sock *, struct timespec __user *);
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#endif /* defined(CONFIG_COMPAT) */
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extern int get_compat_msghdr(struct msghdr *, struct compat_msghdr __user *);
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extern int verify_compat_iovec(struct msghdr *, struct iovec *, char *, int);
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extern int verify_compat_iovec(struct msghdr *, struct iovec *, struct sockaddr *, int);
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extern asmlinkage long compat_sys_sendmsg(int,struct compat_msghdr __user *,unsigned);
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extern asmlinkage long compat_sys_recvmsg(int,struct compat_msghdr __user *,unsigned);
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extern asmlinkage long compat_sys_getsockopt(int, int, int, char __user *, int __user *);
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@ -75,7 +75,7 @@ int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
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/* I've named the args so it is easy to tell whose space the pointers are in. */
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int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
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char *kern_address, int mode)
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struct sockaddr *kern_address, int mode)
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{
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int tot_len;
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@ -36,7 +36,7 @@
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* in any case.
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*/
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int verify_iovec(struct msghdr *m, struct iovec *iov, char *address, int mode)
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int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr *address, int mode)
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{
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int size, err, ct;
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82
net/socket.c
82
net/socket.c
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@ -180,9 +180,9 @@ static DEFINE_PER_CPU(int, sockets_in_use) = 0;
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* invalid addresses -EFAULT is returned. On a success 0 is returned.
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*/
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int move_addr_to_kernel(void __user *uaddr, int ulen, void *kaddr)
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int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr)
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{
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if (ulen < 0 || ulen > MAX_SOCK_ADDR)
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if (ulen < 0 || ulen > sizeof(struct sockaddr_storage))
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return -EINVAL;
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if (ulen == 0)
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return 0;
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@ -208,7 +208,7 @@ int move_addr_to_kernel(void __user *uaddr, int ulen, void *kaddr)
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* specified. Zero is returned for a success.
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*/
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int move_addr_to_user(void *kaddr, int klen, void __user *uaddr,
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int move_addr_to_user(struct sockaddr *kaddr, int klen, void __user *uaddr,
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int __user *ulen)
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{
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int err;
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@ -219,7 +219,7 @@ int move_addr_to_user(void *kaddr, int klen, void __user *uaddr,
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return err;
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if (len > klen)
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len = klen;
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if (len < 0 || len > MAX_SOCK_ADDR)
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if (len < 0 || len > sizeof(struct sockaddr_storage))
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return -EINVAL;
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if (len) {
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if (audit_sockaddr(klen, kaddr))
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@ -1342,20 +1342,20 @@ asmlinkage long sys_socketpair(int family, int type, int protocol,
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asmlinkage long sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen)
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{
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struct socket *sock;
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char address[MAX_SOCK_ADDR];
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struct sockaddr_storage address;
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int err, fput_needed;
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sock = sockfd_lookup_light(fd, &err, &fput_needed);
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if (sock) {
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err = move_addr_to_kernel(umyaddr, addrlen, address);
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err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address);
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if (err >= 0) {
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err = security_socket_bind(sock,
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(struct sockaddr *)address,
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(struct sockaddr *)&address,
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addrlen);
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if (!err)
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err = sock->ops->bind(sock,
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(struct sockaddr *)
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address, addrlen);
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&address, addrlen);
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}
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fput_light(sock->file, fput_needed);
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}
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@ -1407,7 +1407,7 @@ asmlinkage long sys_accept(int fd, struct sockaddr __user *upeer_sockaddr,
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struct socket *sock, *newsock;
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struct file *newfile;
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int err, len, newfd, fput_needed;
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char address[MAX_SOCK_ADDR];
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struct sockaddr_storage address;
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sock = sockfd_lookup_light(fd, &err, &fput_needed);
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if (!sock)
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@ -1446,13 +1446,13 @@ asmlinkage long sys_accept(int fd, struct sockaddr __user *upeer_sockaddr,
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goto out_fd;
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if (upeer_sockaddr) {
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if (newsock->ops->getname(newsock, (struct sockaddr *)address,
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if (newsock->ops->getname(newsock, (struct sockaddr *)&address,
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&len, 2) < 0) {
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err = -ECONNABORTED;
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goto out_fd;
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}
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err = move_addr_to_user(address, len, upeer_sockaddr,
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upeer_addrlen);
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err = move_addr_to_user((struct sockaddr *)&address,
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len, upeer_sockaddr, upeer_addrlen);
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if (err < 0)
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goto out_fd;
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}
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@ -1495,22 +1495,22 @@ asmlinkage long sys_connect(int fd, struct sockaddr __user *uservaddr,
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int addrlen)
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{
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struct socket *sock;
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char address[MAX_SOCK_ADDR];
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struct sockaddr_storage address;
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int err, fput_needed;
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sock = sockfd_lookup_light(fd, &err, &fput_needed);
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if (!sock)
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goto out;
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err = move_addr_to_kernel(uservaddr, addrlen, address);
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err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address);
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if (err < 0)
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goto out_put;
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err =
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security_socket_connect(sock, (struct sockaddr *)address, addrlen);
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security_socket_connect(sock, (struct sockaddr *)&address, addrlen);
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if (err)
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goto out_put;
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err = sock->ops->connect(sock, (struct sockaddr *)address, addrlen,
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err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen,
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sock->file->f_flags);
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out_put:
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fput_light(sock->file, fput_needed);
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@ -1527,7 +1527,7 @@ asmlinkage long sys_getsockname(int fd, struct sockaddr __user *usockaddr,
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int __user *usockaddr_len)
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{
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struct socket *sock;
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char address[MAX_SOCK_ADDR];
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struct sockaddr_storage address;
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int len, err, fput_needed;
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sock = sockfd_lookup_light(fd, &err, &fput_needed);
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@ -1538,10 +1538,10 @@ asmlinkage long sys_getsockname(int fd, struct sockaddr __user *usockaddr,
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if (err)
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goto out_put;
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err = sock->ops->getname(sock, (struct sockaddr *)address, &len, 0);
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err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0);
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if (err)
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goto out_put;
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err = move_addr_to_user(address, len, usockaddr, usockaddr_len);
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err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len);
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out_put:
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fput_light(sock->file, fput_needed);
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@ -1558,7 +1558,7 @@ asmlinkage long sys_getpeername(int fd, struct sockaddr __user *usockaddr,
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int __user *usockaddr_len)
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{
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struct socket *sock;
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char address[MAX_SOCK_ADDR];
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struct sockaddr_storage address;
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int len, err, fput_needed;
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sock = sockfd_lookup_light(fd, &err, &fput_needed);
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@ -1570,10 +1570,10 @@ asmlinkage long sys_getpeername(int fd, struct sockaddr __user *usockaddr,
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}
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err =
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sock->ops->getname(sock, (struct sockaddr *)address, &len,
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sock->ops->getname(sock, (struct sockaddr *)&address, &len,
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1);
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if (!err)
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err = move_addr_to_user(address, len, usockaddr,
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err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr,
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usockaddr_len);
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fput_light(sock->file, fput_needed);
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}
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@ -1591,7 +1591,7 @@ asmlinkage long sys_sendto(int fd, void __user *buff, size_t len,
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int addr_len)
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{
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struct socket *sock;
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char address[MAX_SOCK_ADDR];
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struct sockaddr_storage address;
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int err;
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struct msghdr msg;
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struct iovec iov;
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@ -1610,10 +1610,10 @@ asmlinkage long sys_sendto(int fd, void __user *buff, size_t len,
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msg.msg_controllen = 0;
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msg.msg_namelen = 0;
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if (addr) {
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err = move_addr_to_kernel(addr, addr_len, address);
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err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address);
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if (err < 0)
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goto out_put;
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msg.msg_name = address;
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msg.msg_name = (struct sockaddr *)&address;
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msg.msg_namelen = addr_len;
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}
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if (sock->file->f_flags & O_NONBLOCK)
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@ -1649,7 +1649,7 @@ asmlinkage long sys_recvfrom(int fd, void __user *ubuf, size_t size,
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struct socket *sock;
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struct iovec iov;
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struct msghdr msg;
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char address[MAX_SOCK_ADDR];
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struct sockaddr_storage address;
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int err, err2;
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int fput_needed;
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msg.msg_iov = &iov;
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iov.iov_len = size;
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iov.iov_base = ubuf;
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msg.msg_name = address;
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msg.msg_namelen = MAX_SOCK_ADDR;
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msg.msg_name = (struct sockaddr *)&address;
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msg.msg_namelen = sizeof(address);
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if (sock->file->f_flags & O_NONBLOCK)
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flags |= MSG_DONTWAIT;
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err = sock_recvmsg(sock, &msg, size, flags);
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if (err >= 0 && addr != NULL) {
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err2 = move_addr_to_user(address, msg.msg_namelen, addr, addr_len);
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err2 = move_addr_to_user((struct sockaddr *)&address,
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msg.msg_namelen, addr, addr_len);
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if (err2 < 0)
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err = err2;
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}
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@ -1790,7 +1791,7 @@ asmlinkage long sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags)
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struct compat_msghdr __user *msg_compat =
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(struct compat_msghdr __user *)msg;
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struct socket *sock;
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char address[MAX_SOCK_ADDR];
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struct sockaddr_storage address;
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struct iovec iovstack[UIO_FASTIOV], *iov = iovstack;
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unsigned char ctl[sizeof(struct cmsghdr) + 20]
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__attribute__ ((aligned(sizeof(__kernel_size_t))));
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/* This will also move the address data into kernel space */
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if (MSG_CMSG_COMPAT & flags) {
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err = verify_compat_iovec(&msg_sys, iov, address, VERIFY_READ);
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err = verify_compat_iovec(&msg_sys, iov,
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(struct sockaddr *)&address,
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VERIFY_READ);
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} else
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err = verify_iovec(&msg_sys, iov, address, VERIFY_READ);
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err = verify_iovec(&msg_sys, iov,
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(struct sockaddr *)&address,
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VERIFY_READ);
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if (err < 0)
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goto out_freeiov;
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total_len = err;
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@ -1901,7 +1906,7 @@ asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg,
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int fput_needed;
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/* kernel mode address */
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char addr[MAX_SOCK_ADDR];
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struct sockaddr_storage addr;
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/* user mode address pointers */
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struct sockaddr __user *uaddr;
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@ -1939,9 +1944,13 @@ asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg,
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uaddr = (__force void __user *)msg_sys.msg_name;
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uaddr_len = COMPAT_NAMELEN(msg);
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if (MSG_CMSG_COMPAT & flags) {
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err = verify_compat_iovec(&msg_sys, iov, addr, VERIFY_WRITE);
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err = verify_compat_iovec(&msg_sys, iov,
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(struct sockaddr *)&addr,
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VERIFY_WRITE);
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} else
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err = verify_iovec(&msg_sys, iov, addr, VERIFY_WRITE);
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err = verify_iovec(&msg_sys, iov,
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(struct sockaddr *)&addr,
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VERIFY_WRITE);
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if (err < 0)
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goto out_freeiov;
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total_len = err;
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@ -1957,7 +1966,8 @@ asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg,
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len = err;
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if (uaddr != NULL) {
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err = move_addr_to_user(addr, msg_sys.msg_namelen, uaddr,
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err = move_addr_to_user((struct sockaddr *)&addr,
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msg_sys.msg_namelen, uaddr,
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uaddr_len);
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if (err < 0)
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goto out_freeiov;
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