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net: Make setsockopt() optlen be unsigned.
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This provides safety against negative optlen at the type
level instead of depending upon (sometimes non-trivial)
checks against this sprinkled all over the the place, in
each and every implementation.

Based upon work done by Arjan van de Ven and feedback
from Linus Torvalds.

Signed-off-by: David S. Miller <davem@davemloft.net>
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@davem330
davem330 committed Sep 30, 2009
1 parent eb1cf0f commit b705884
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Showing 67 changed files with 149 additions and 153 deletions.
8 changes: 0 additions & 8 deletions drivers/atm/ambassador.c
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Expand Up @@ -1306,14 +1306,6 @@ static void amb_close (struct atm_vcc * atm_vcc) {
return;
}

/********** Set socket options for a VC **********/

// int amb_getsockopt (struct atm_vcc * atm_vcc, int level, int optname, void * optval, int optlen);

/********** Set socket options for a VC **********/

// int amb_setsockopt (struct atm_vcc * atm_vcc, int level, int optname, void * optval, int optlen);

/********** Send **********/

static int amb_send (struct atm_vcc * atm_vcc, struct sk_buff * skb) {
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2 changes: 1 addition & 1 deletion drivers/atm/eni.c
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Expand Up @@ -2031,7 +2031,7 @@ static int eni_getsockopt(struct atm_vcc *vcc,int level,int optname,


static int eni_setsockopt(struct atm_vcc *vcc,int level,int optname,
void __user *optval,int optlen)
void __user *optval,unsigned int optlen)
{
return -EINVAL;
}
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2 changes: 1 addition & 1 deletion drivers/atm/firestream.c
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Expand Up @@ -1244,7 +1244,7 @@ static int fs_getsockopt(struct atm_vcc *vcc,int level,int optname,


static int fs_setsockopt(struct atm_vcc *vcc,int level,int optname,
void __user *optval,int optlen)
void __user *optval,unsigned int optlen)
{
func_enter ();
func_exit ();
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2 changes: 1 addition & 1 deletion drivers/atm/fore200e.c
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Expand Up @@ -1795,7 +1795,7 @@ fore200e_getsockopt(struct atm_vcc* vcc, int level, int optname, void __user *op


static int
fore200e_setsockopt(struct atm_vcc* vcc, int level, int optname, void __user *optval, int optlen)
fore200e_setsockopt(struct atm_vcc* vcc, int level, int optname, void __user *optval, unsigned int optlen)
{
/* struct fore200e* fore200e = FORE200E_DEV(vcc->dev); */

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2 changes: 1 addition & 1 deletion drivers/atm/horizon.c
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Expand Up @@ -2590,7 +2590,7 @@ static int hrz_getsockopt (struct atm_vcc * atm_vcc, int level, int optname,
}

static int hrz_setsockopt (struct atm_vcc * atm_vcc, int level, int optname,
void *optval, int optlen) {
void *optval, unsigned int optlen) {
hrz_dev * dev = HRZ_DEV(atm_vcc->dev);
PRINTD (DBG_FLOW|DBG_VCC, "hrz_setsockopt");
switch (level) {
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2 changes: 1 addition & 1 deletion drivers/atm/iphase.c
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Expand Up @@ -2862,7 +2862,7 @@ static int ia_getsockopt(struct atm_vcc *vcc, int level, int optname,
}

static int ia_setsockopt(struct atm_vcc *vcc, int level, int optname,
void __user *optval, int optlen)
void __user *optval, unsigned int optlen)
{
IF_EVENT(printk(">ia_setsockopt\n");)
return -EINVAL;
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2 changes: 1 addition & 1 deletion drivers/atm/zatm.c
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Expand Up @@ -1517,7 +1517,7 @@ static int zatm_getsockopt(struct atm_vcc *vcc,int level,int optname,


static int zatm_setsockopt(struct atm_vcc *vcc,int level,int optname,
void __user *optval,int optlen)
void __user *optval,unsigned int optlen)
{
return -EINVAL;
}
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2 changes: 1 addition & 1 deletion drivers/isdn/mISDN/socket.c
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Expand Up @@ -415,7 +415,7 @@ 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, int len)
char __user *optval, unsigned int len)
{
struct sock *sk = sock->sk;
int err = 0, opt = 0;
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2 changes: 1 addition & 1 deletion drivers/net/pppol2tp.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2179,7 +2179,7 @@ static int pppol2tp_session_setsockopt(struct sock *sk,
* session or the special tunnel type.
*/
static int pppol2tp_setsockopt(struct socket *sock, int level, int optname,
char __user *optval, int optlen)
char __user *optval, unsigned int optlen)
{
struct sock *sk = sock->sk;
struct pppol2tp_session *session = sk->sk_user_data;
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2 changes: 1 addition & 1 deletion include/linux/atmdev.h
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Expand Up @@ -397,7 +397,7 @@ struct atmdev_ops { /* only send is required */
int (*getsockopt)(struct atm_vcc *vcc,int level,int optname,
void __user *optval,int optlen);
int (*setsockopt)(struct atm_vcc *vcc,int level,int optname,
void __user *optval,int optlen);
void __user *optval,unsigned int optlen);
int (*send)(struct atm_vcc *vcc,struct sk_buff *skb);
int (*send_oam)(struct atm_vcc *vcc,void *cell,int flags);
void (*phy_put)(struct atm_dev *dev,unsigned char value,
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4 changes: 2 additions & 2 deletions include/linux/mroute.h
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Original file line number Diff line number Diff line change
Expand Up @@ -145,14 +145,14 @@ static inline int ip_mroute_opt(int opt)
#endif

#ifdef CONFIG_IP_MROUTE
extern int ip_mroute_setsockopt(struct sock *, int, char __user *, int);
extern int ip_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
extern int ip_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
extern int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg);
extern int ip_mr_init(void);
#else
static inline
int ip_mroute_setsockopt(struct sock *sock,
int optname, char __user *optval, int optlen)
int optname, char __user *optval, unsigned int optlen)
{
return -ENOPROTOOPT;
}
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4 changes: 2 additions & 2 deletions include/linux/mroute6.h
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Original file line number Diff line number Diff line change
Expand Up @@ -134,7 +134,7 @@ static inline int ip6_mroute_opt(int opt)
struct sock;

#ifdef CONFIG_IPV6_MROUTE
extern int ip6_mroute_setsockopt(struct sock *, int, char __user *, int);
extern int ip6_mroute_setsockopt(struct sock *, int, char __user *, unsigned int);
extern int ip6_mroute_getsockopt(struct sock *, int, char __user *, int __user *);
extern int ip6_mr_input(struct sk_buff *skb);
extern int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg);
Expand All @@ -143,7 +143,7 @@ extern void ip6_mr_cleanup(void);
#else
static inline
int ip6_mroute_setsockopt(struct sock *sock,
int optname, char __user *optval, int optlen)
int optname, char __user *optval, unsigned int optlen)
{
return -ENOPROTOOPT;
}
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8 changes: 4 additions & 4 deletions include/linux/net.h
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Original file line number Diff line number Diff line change
Expand Up @@ -178,11 +178,11 @@ 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, int optlen);
int optname, char __user *optval, unsigned int optlen);
int (*getsockopt)(struct socket *sock, int level,
int optname, char __user *optval, int __user *optlen);
int (*compat_setsockopt)(struct socket *sock, int level,
int optname, char __user *optval, int optlen);
int optname, char __user *optval, unsigned int optlen);
int (*compat_getsockopt)(struct socket *sock, int level,
int optname, char __user *optval, int __user *optlen);
int (*sendmsg) (struct kiocb *iocb, struct socket *sock,
Expand Down Expand Up @@ -256,7 +256,7 @@ extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
extern int kernel_getsockopt(struct socket *sock, int level, int optname,
char *optval, int *optlen);
extern int kernel_setsockopt(struct socket *sock, int level, int optname,
char *optval, int optlen);
char *optval, unsigned int optlen);
extern int kernel_sendpage(struct socket *sock, struct page *page, int offset,
size_t size, int flags);
extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
Expand Down Expand Up @@ -313,7 +313,7 @@ SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \
SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \
SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \
SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \
char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \
char __user *optval, unsigned int optlen), (sock, level, optname, optval, optlen)) \
SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \
char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \
SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \
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4 changes: 2 additions & 2 deletions include/linux/netfilter.h
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Original file line number Diff line number Diff line change
Expand Up @@ -221,12 +221,12 @@ __ret;})

/* Call setsockopt() */
int nf_setsockopt(struct sock *sk, u_int8_t pf, int optval, char __user *opt,
int len);
unsigned int len);
int nf_getsockopt(struct sock *sk, u_int8_t pf, int optval, char __user *opt,
int *len);

int compat_nf_setsockopt(struct sock *sk, u_int8_t pf, int optval,
char __user *opt, int len);
char __user *opt, unsigned int len);
int compat_nf_getsockopt(struct sock *sk, u_int8_t pf, int optval,
char __user *opt, int *len);

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4 changes: 2 additions & 2 deletions include/net/compat.h
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Original file line number Diff line number Diff line change
Expand Up @@ -40,8 +40,8 @@ extern int put_cmsg_compat(struct msghdr*, int, int, int, void *);

extern int cmsghdr_from_user_compat_to_kern(struct msghdr *, struct sock *, unsigned char *, int);

extern int compat_mc_setsockopt(struct sock *, int, int, char __user *, int,
int (*)(struct sock *, int, int, char __user *, int));
extern int compat_mc_setsockopt(struct sock *, int, int, char __user *, unsigned int,
int (*)(struct sock *, int, int, char __user *, unsigned int));
extern int compat_mc_getsockopt(struct sock *, int, int, char __user *,
int __user *, int (*)(struct sock *, int, int, char __user *,
int __user *));
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6 changes: 3 additions & 3 deletions include/net/inet_connection_sock.h
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Original file line number Diff line number Diff line change
Expand Up @@ -48,13 +48,13 @@ struct inet_connection_sock_af_ops {
u16 net_header_len;
u16 sockaddr_len;
int (*setsockopt)(struct sock *sk, int level, int optname,
char __user *optval, int optlen);
char __user *optval, unsigned int optlen);
int (*getsockopt)(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen);
#ifdef CONFIG_COMPAT
int (*compat_setsockopt)(struct sock *sk,
int level, int optname,
char __user *optval, int optlen);
char __user *optval, unsigned int optlen);
int (*compat_getsockopt)(struct sock *sk,
int level, int optname,
char __user *optval, int __user *optlen);
Expand Down Expand Up @@ -332,5 +332,5 @@ extern void inet_csk_addr2sockaddr(struct sock *sk, struct sockaddr *uaddr);
extern int inet_csk_compat_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen);
extern int inet_csk_compat_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen);
char __user *optval, unsigned int optlen);
#endif /* _INET_CONNECTION_SOCK_H */
4 changes: 2 additions & 2 deletions include/net/ip.h
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Expand Up @@ -381,10 +381,10 @@ extern int ip_options_rcv_srr(struct sk_buff *skb);
extern void ip_cmsg_recv(struct msghdr *msg, struct sk_buff *skb);
extern int ip_cmsg_send(struct net *net,
struct msghdr *msg, struct ipcm_cookie *ipc);
extern int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval, int optlen);
extern int ip_setsockopt(struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen);
extern int ip_getsockopt(struct sock *sk, int level, int optname, char __user *optval, int __user *optlen);
extern int compat_ip_setsockopt(struct sock *sk, int level,
int optname, char __user *optval, int optlen);
int optname, char __user *optval, unsigned int optlen);
extern int compat_ip_getsockopt(struct sock *sk, int level,
int optname, char __user *optval, int __user *optlen);
extern int ip_ra_control(struct sock *sk, unsigned char on, void (*destructor)(struct sock *));
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4 changes: 2 additions & 2 deletions include/net/ipv6.h
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Expand Up @@ -550,7 +550,7 @@ extern int ipv6_find_tlv(struct sk_buff *skb, int offset, int type);
extern int ipv6_setsockopt(struct sock *sk, int level,
int optname,
char __user *optval,
int optlen);
unsigned int optlen);
extern int ipv6_getsockopt(struct sock *sk, int level,
int optname,
char __user *optval,
Expand All @@ -559,7 +559,7 @@ extern int compat_ipv6_setsockopt(struct sock *sk,
int level,
int optname,
char __user *optval,
int optlen);
unsigned int optlen);
extern int compat_ipv6_getsockopt(struct sock *sk,
int level,
int optname,
Expand Down
4 changes: 2 additions & 2 deletions include/net/sctp/structs.h
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Original file line number Diff line number Diff line change
Expand Up @@ -544,7 +544,7 @@ struct sctp_af {
int level,
int optname,
char __user *optval,
int optlen);
unsigned int optlen);
int (*getsockopt) (struct sock *sk,
int level,
int optname,
Expand All @@ -554,7 +554,7 @@ struct sctp_af {
int level,
int optname,
char __user *optval,
int optlen);
unsigned int optlen);
int (*compat_getsockopt) (struct sock *sk,
int level,
int optname,
Expand Down
12 changes: 6 additions & 6 deletions include/net/sock.h
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Original file line number Diff line number Diff line change
Expand Up @@ -624,15 +624,15 @@ struct proto {
void (*shutdown)(struct sock *sk, int how);
int (*setsockopt)(struct sock *sk, int level,
int optname, char __user *optval,
int optlen);
unsigned int optlen);
int (*getsockopt)(struct sock *sk, int level,
int optname, char __user *optval,
int __user *option);
#ifdef CONFIG_COMPAT
int (*compat_setsockopt)(struct sock *sk,
int level,
int optname, char __user *optval,
int optlen);
unsigned int optlen);
int (*compat_getsockopt)(struct sock *sk,
int level,
int optname, char __user *optval,
Expand Down Expand Up @@ -951,7 +951,7 @@ extern void sock_rfree(struct sk_buff *skb);

extern int sock_setsockopt(struct socket *sock, int level,
int op, char __user *optval,
int optlen);
unsigned int optlen);

extern int sock_getsockopt(struct socket *sock, int level,
int op, char __user *optval,
Expand Down Expand Up @@ -993,7 +993,7 @@ extern int sock_no_shutdown(struct socket *, int);
extern int sock_no_getsockopt(struct socket *, int , int,
char __user *, int __user *);
extern int sock_no_setsockopt(struct socket *, int, int,
char __user *, int);
char __user *, unsigned int);
extern int sock_no_sendmsg(struct kiocb *, struct socket *,
struct msghdr *, size_t);
extern int sock_no_recvmsg(struct kiocb *, struct socket *,
Expand All @@ -1015,11 +1015,11 @@ extern int sock_common_getsockopt(struct socket *sock, int level, int optname,
extern int sock_common_recvmsg(struct kiocb *iocb, struct socket *sock,
struct msghdr *msg, size_t size, int flags);
extern int sock_common_setsockopt(struct socket *sock, int level, int optname,
char __user *optval, int optlen);
char __user *optval, unsigned int optlen);
extern int compat_sock_common_getsockopt(struct socket *sock, int level,
int optname, char __user *optval, int __user *optlen);
extern int compat_sock_common_setsockopt(struct socket *sock, int level,
int optname, char __user *optval, int optlen);
int optname, char __user *optval, unsigned int optlen);

extern void sk_common_release(struct sock *sk);

Expand Down
4 changes: 2 additions & 2 deletions include/net/tcp.h
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Original file line number Diff line number Diff line change
Expand Up @@ -394,13 +394,13 @@ extern int tcp_getsockopt(struct sock *sk, int level,
int __user *optlen);
extern int tcp_setsockopt(struct sock *sk, int level,
int optname, char __user *optval,
int optlen);
unsigned int optlen);
extern int compat_tcp_getsockopt(struct sock *sk,
int level, int optname,
char __user *optval, int __user *optlen);
extern int compat_tcp_setsockopt(struct sock *sk,
int level, int optname,
char __user *optval, int optlen);
char __user *optval, unsigned int optlen);
extern void tcp_set_keepalive(struct sock *sk, int val);
extern int tcp_recvmsg(struct kiocb *iocb, struct sock *sk,
struct msghdr *msg,
Expand Down
2 changes: 1 addition & 1 deletion include/net/udp.h
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Original file line number Diff line number Diff line change
Expand Up @@ -144,7 +144,7 @@ extern unsigned int udp_poll(struct file *file, struct socket *sock,
extern int udp_lib_getsockopt(struct sock *sk, int level, int optname,
char __user *optval, int __user *optlen);
extern int udp_lib_setsockopt(struct sock *sk, int level, int optname,
char __user *optval, int optlen,
char __user *optval, unsigned int optlen,
int (*push_pending_frames)(struct sock *));

extern struct sock *udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport,
Expand Down
2 changes: 1 addition & 1 deletion net/atm/common.c
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Original file line number Diff line number Diff line change
Expand Up @@ -679,7 +679,7 @@ static int check_qos(const struct atm_qos *qos)
}

int vcc_setsockopt(struct socket *sock, int level, int optname,
char __user *optval, int optlen)
char __user *optval, unsigned int optlen)
{
struct atm_vcc *vcc;
unsigned long value;
Expand Down
2 changes: 1 addition & 1 deletion net/atm/common.h
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Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,7 @@ unsigned int 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, int optlen);
char __user *optval, unsigned int optlen);
int vcc_getsockopt(struct socket *sock, int level, int optname,
char __user *optval, int __user *optlen);

Expand Down
2 changes: 1 addition & 1 deletion net/atm/pvc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -59,7 +59,7 @@ static int pvc_connect(struct socket *sock,struct sockaddr *sockaddr,
}

static int pvc_setsockopt(struct socket *sock, int level, int optname,
char __user *optval, int optlen)
char __user *optval, unsigned int optlen)
{
struct sock *sk = sock->sk;
int error;
Expand Down
2 changes: 1 addition & 1 deletion net/atm/svc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -446,7 +446,7 @@ 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, int optlen)
char __user *optval, unsigned int optlen)
{
struct sock *sk = sock->sk;
struct atm_vcc *vcc = ATM_SD(sock);
Expand Down
2 changes: 1 addition & 1 deletion net/ax25/af_ax25.c
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Original file line number Diff line number Diff line change
Expand Up @@ -534,7 +534,7 @@ ax25_cb *ax25_create_cb(void)
*/

static int ax25_setsockopt(struct socket *sock, int level, int optname,
char __user *optval, int optlen)
char __user *optval, unsigned int optlen)
{
struct sock *sk = sock->sk;
ax25_cb *ax25;
Expand Down
2 changes: 1 addition & 1 deletion net/bluetooth/hci_sock.c
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Original file line number Diff line number Diff line change
Expand Up @@ -466,7 +466,7 @@ static int hci_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
goto done;
}

static int hci_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int len)
static int hci_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int len)
{
struct hci_ufilter uf = { .opcode = 0 };
struct sock *sk = sock->sk;
Expand Down
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