net: Make setsockopt() optlen be unsigned.

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>

67 files changed, 149 insertions, 153 deletions

diff --git a/drivers/atm/ambassador.c b/drivers/atm/ambassador.c
index 703364b52170..66e181345b3a 100644
--- a/drivers/atm/ambassador.c
+++ b/drivers/atm/ambassador.c
@@ -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) {
diff --git a/drivers/atm/eni.c b/drivers/atm/eni.c
index 5503bfc8e132..0c3026145443 100644
--- a/drivers/atm/eni.c
+++ b/drivers/atm/eni.c
@@ -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;
 }
diff --git a/drivers/atm/firestream.c b/drivers/atm/firestream.c
index b119640e1ee9..cd5049af47a9 100644
--- a/drivers/atm/firestream.c
+++ b/drivers/atm/firestream.c
@@ -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 ();
diff --git a/drivers/atm/fore200e.c b/drivers/atm/fore200e.c
index 10f000dbe448..f766cc46b4c4 100644
--- a/drivers/atm/fore200e.c
+++ b/drivers/atm/fore200e.c
@@ -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); */
     
diff --git a/drivers/atm/horizon.c b/drivers/atm/horizon.c
index 01ce241dbeae..4e49021e67ee 100644
--- a/drivers/atm/horizon.c
+++ b/drivers/atm/horizon.c
@@ -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) {
diff --git a/drivers/atm/iphase.c b/drivers/atm/iphase.c
index 78c9736c3579..b2c1b37ab2e4 100644
--- a/drivers/atm/iphase.c
+++ b/drivers/atm/iphase.c
@@ -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;  
diff --git a/drivers/atm/zatm.c b/drivers/atm/zatm.c
index 752b1ba81f7e..2e9635be048c 100644
--- a/drivers/atm/zatm.c
+++ b/drivers/atm/zatm.c
@@ -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;
 }
diff --git a/drivers/isdn/mISDN/socket.c b/drivers/isdn/mISDN/socket.c
index c36f52137456..feb0fa45b664 100644
--- a/drivers/isdn/mISDN/socket.c
+++ b/drivers/isdn/mISDN/socket.c
@@ -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;
diff --git a/drivers/net/pppol2tp.c b/drivers/net/pppol2tp.c
index cc394d073755..5910df60c93e 100644
--- a/drivers/net/pppol2tp.c
+++ b/drivers/net/pppol2tp.c
@@ -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;
diff --git a/include/linux/atmdev.h b/include/linux/atmdev.h
index 086e5c362d3a..817b23705c91 100644
--- a/include/linux/atmdev.h
+++ b/include/linux/atmdev.h
@@ -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,
diff --git a/include/linux/mroute.h b/include/linux/mroute.h
index 0d45b4e8d367..08bc776d05e2 100644
--- a/include/linux/mroute.h
+++ b/include/linux/mroute.h
@@ -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;
 }
diff --git a/include/linux/mroute6.h b/include/linux/mroute6.h
index 43dc97e32183..b191865a6ca3 100644
--- a/include/linux/mroute6.h
+++ b/include/linux/mroute6.h
@@ -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);
@@ -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;
 }
diff --git a/include/linux/net.h b/include/linux/net.h
index 9040a10584f7..529a0931711d 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -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,
@@ -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);
@@ -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), \
diff --git a/include/linux/netfilter.h b/include/linux/netfilter.h
index 48cfe51bfddc..6132b5e6d9d3 100644
--- a/include/linux/netfilter.h
+++ b/include/linux/netfilter.h
@@ -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);
 
diff --git a/include/net/compat.h b/include/net/compat.h
index 5bbf8bf9efea..7c3002832d05 100644
--- a/include/net/compat.h
+++ b/include/net/compat.h
@@ -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 *));
diff --git a/include/net/inet_connection_sock.h b/include/net/inet_connection_sock.h
index 03cffd9f64e3..696d6e4ce68a 100644
--- a/include/net/inet_connection_sock.h
+++ b/include/net/inet_connection_sock.h
@@ -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);
@@ -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 */
diff --git a/include/net/ip.h b/include/net/ip.h
index 5b26a0bd178e..2f47e5482b55 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -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 *));
diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index ad9a51130254..8c31d8a0c1fe 100644
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -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, 
@@ -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,
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 42d00ced5eb8..6e5f0e0c7967 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -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,
@@ -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,
diff --git a/include/net/sock.h b/include/net/sock.h
index 950409dcec3d..1621935aad5b 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -624,7 +624,7 @@ 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);     
@@ -632,7 +632,7 @@ struct proto {
         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,
@@ -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, 
@@ -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 *,
@@ -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);
 
diff --git a/include/net/tcp.h b/include/net/tcp.h
index 56b76027b85e..03a49c703377 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -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,
diff --git a/include/net/udp.h b/include/net/udp.h
index 5fb029f817a3..f98abd2ce709 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h
@@ -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,
diff --git a/net/atm/common.c b/net/atm/common.c
index 8c4d843eb17f..950bd16d2383 100644
--- a/net/atm/common.c
+++ b/net/atm/common.c
@@ -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;
diff --git a/net/atm/common.h b/net/atm/common.h
index 92e2981f479f..f48a76b6cdf4 100644
--- a/net/atm/common.h
+++ b/net/atm/common.h
@@ -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);
 
diff --git a/net/atm/pvc.c b/net/atm/pvc.c
index e1d22d9430dd..d4c024504f99 100644
--- a/net/atm/pvc.c
+++ b/net/atm/pvc.c
@@ -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;
diff --git a/net/atm/svc.c b/net/atm/svc.c
index 7b831b526d0b..f90d143c4b25 100644
--- a/net/atm/svc.c
+++ b/net/atm/svc.c
@@ -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);
diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index 4102de1022ee..cd1c3dc0fe01 100644
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -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;
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 4f9621f759a0..75302a986067 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -466,7 +466,7 @@ drop:
         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;
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index b03012564647..555d9da1869b 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -1698,7 +1698,7 @@ static int l2cap_sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct ms
         return bt_sock_recvmsg(iocb, sock, msg, len, flags);
 }
 
-static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, int optlen)
+static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen)
 {
         struct sock *sk = sock->sk;
         struct l2cap_options opts;
@@ -1755,7 +1755,7 @@ static int l2cap_sock_setsockopt_old(struct socket *sock, int optname, char __us
         return err;
 }
 
-static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
+static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen)
 {
         struct sock *sk = sock->sk;
         struct bt_security sec;
diff --git a/net/bluetooth/rfcomm/sock.c b/net/bluetooth/rfcomm/sock.c
index 0b85e8116859..8a20aaf1f231 100644
--- a/net/bluetooth/rfcomm/sock.c
+++ b/net/bluetooth/rfcomm/sock.c
@@ -730,7 +730,7 @@ out:
         return copied ? : err;
 }
 
-static int rfcomm_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, int optlen)
+static int rfcomm_sock_setsockopt_old(struct socket *sock, int optname, char __user *optval, unsigned int optlen)
 {
         struct sock *sk = sock->sk;
         int err = 0;
@@ -766,7 +766,7 @@ static int rfcomm_sock_setsockopt_old(struct socket *sock, int optname, char __u
         return err;
 }
 
-static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
+static int rfcomm_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen)
 {
         struct sock *sk = sock->sk;
         struct bt_security sec;
diff --git a/net/bluetooth/sco.c b/net/bluetooth/sco.c
index 13c27f17192c..77f4153bdb5e 100644
--- a/net/bluetooth/sco.c
+++ b/net/bluetooth/sco.c
@@ -644,7 +644,7 @@ static int sco_sock_sendmsg(struct kiocb *iocb, struct socket *sock,
         return err;
 }
 
-static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
+static int sco_sock_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen)
 {
         struct sock *sk = sock->sk;
         int err = 0;
diff --git a/net/can/raw.c b/net/can/raw.c
index db3152df7d2b..b5e897922d32 100644
--- a/net/can/raw.c
+++ b/net/can/raw.c
@@ -411,7 +411,7 @@ static int raw_getname(struct socket *sock, struct sockaddr *uaddr,
 }
 
 static int raw_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 raw_sock *ro = raw_sk(sk);
diff --git a/net/compat.c b/net/compat.c
index 12728b17a226..a407c3addbae 100644
--- a/net/compat.c
+++ b/net/compat.c
@@ -331,7 +331,7 @@ struct compat_sock_fprog {
 };
 
 static int do_set_attach_filter(struct socket *sock, int level, int optname,
-                                char __user *optval, int optlen)
+                                char __user *optval, unsigned int optlen)
 {
         struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
         struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
@@ -351,7 +351,7 @@ static int do_set_attach_filter(struct socket *sock, int level, int optname,
 }
 
 static int do_set_sock_timeout(struct socket *sock, int level,
-                int optname, char __user *optval, int optlen)
+                int optname, char __user *optval, unsigned int optlen)
 {
         struct compat_timeval __user *up = (struct compat_timeval __user *) optval;
         struct timeval ktime;
@@ -373,7 +373,7 @@ static int do_set_sock_timeout(struct socket *sock, int level,
 }
 
 static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
-                                char __user *optval, int optlen)
+                                char __user *optval, unsigned int optlen)
 {
         if (optname == SO_ATTACH_FILTER)
                 return do_set_attach_filter(sock, level, optname,
@@ -385,7 +385,7 @@ static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
 }
 
 asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
-                                char __user *optval, int optlen)
+                                char __user *optval, unsigned int optlen)
 {
         int err;
         struct socket *sock;
@@ -558,8 +558,8 @@ struct compat_group_filter {
 
 
 int compat_mc_setsockopt(struct sock *sock, int level, int optname,
-        char __user *optval, int optlen,
-        int (*setsockopt)(struct sock *,int,int,char __user *,int))
+        char __user *optval, unsigned int optlen,
+        int (*setsockopt)(struct sock *,int,int,char __user *,unsigned int))
 {
         char __user     *koptval = optval;
         int             koptlen = optlen;
diff --git a/net/core/sock.c b/net/core/sock.c
index 524712a7b154..77fbfed332e8 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -446,7 +446,7 @@ static inline void sock_valbool_flag(struct sock *sk, int bit, int valbool)
  */
 
 int sock_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 val;
@@ -1697,7 +1697,7 @@ int sock_no_shutdown(struct socket *sock, int how)
 EXPORT_SYMBOL(sock_no_shutdown);
 
 int sock_no_setsockopt(struct socket *sock, int level, int optname,
-                    char __user *optval, int optlen)
+                    char __user *optval, unsigned int optlen)
 {
         return -EOPNOTSUPP;
 }
@@ -2018,7 +2018,7 @@ EXPORT_SYMBOL(sock_common_recvmsg);
  *      Set socket options on an inet socket.
  */
 int sock_common_setsockopt(struct socket *sock, int level, int optname,
-                           char __user *optval, int optlen)
+                           char __user *optval, unsigned int optlen)
 {
         struct sock *sk = sock->sk;
 
@@ -2028,7 +2028,7 @@ EXPORT_SYMBOL(sock_common_setsockopt);
 
 #ifdef CONFIG_COMPAT
 int compat_sock_common_setsockopt(struct socket *sock, int level, int optname,
-                                  char __user *optval, int optlen)
+                                  char __user *optval, unsigned int optlen)
 {
         struct sock *sk = sock->sk;
 
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index d6bc47363b1c..5ef32c2f0d6a 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -290,14 +290,14 @@ extern int	   dccp_disconnect(struct sock *sk, int flags);
 extern int         dccp_getsockopt(struct sock *sk, int level, int optname,
                                    char __user *optval, int __user *optlen);
 extern int         dccp_setsockopt(struct sock *sk, int level, int optname,
-                                   char __user *optval, int optlen);
+                                   char __user *optval, unsigned int optlen);
 #ifdef CONFIG_COMPAT
 extern int         compat_dccp_getsockopt(struct sock *sk,
                                 int level, int optname,
                                 char __user *optval, int __user *optlen);
 extern int         compat_dccp_setsockopt(struct sock *sk,
                                 int level, int optname,
-                                char __user *optval, int optlen);
+                                char __user *optval, unsigned int optlen);
 #endif
 extern int         dccp_ioctl(struct sock *sk, int cmd, unsigned long arg);
 extern int         dccp_sendmsg(struct kiocb *iocb, struct sock *sk,
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index bc4467082a00..a156319fd0ac 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -393,7 +393,7 @@ out:
 EXPORT_SYMBOL_GPL(dccp_ioctl);
 
 static int dccp_setsockopt_service(struct sock *sk, const __be32 service,
-                                   char __user *optval, int optlen)
+                                   char __user *optval, unsigned int optlen)
 {
         struct dccp_sock *dp = dccp_sk(sk);
         struct dccp_service_list *sl = NULL;
@@ -464,7 +464,7 @@ static int dccp_setsockopt_cscov(struct sock *sk, int cscov, bool rx)
 }
 
 static int dccp_setsockopt_ccid(struct sock *sk, int type,
-                                char __user *optval, int optlen)
+                                char __user *optval, unsigned int optlen)
 {
         u8 *val;
         int rc = 0;
@@ -494,7 +494,7 @@ static int dccp_setsockopt_ccid(struct sock *sk, int type,
 }
 
 static int do_dccp_setsockopt(struct sock *sk, int level, int optname,
-                char __user *optval, int optlen)
+                char __user *optval, unsigned int optlen)
 {
         struct dccp_sock *dp = dccp_sk(sk);
         int val, err = 0;
@@ -546,7 +546,7 @@ static int do_dccp_setsockopt(struct sock *sk, int level, int optname,
 }
 
 int dccp_setsockopt(struct sock *sk, int level, int optname,
-                    char __user *optval, int optlen)
+                    char __user *optval, unsigned int optlen)
 {
         if (level != SOL_DCCP)
                 return inet_csk(sk)->icsk_af_ops->setsockopt(sk, level,
@@ -559,7 +559,7 @@ EXPORT_SYMBOL_GPL(dccp_setsockopt);
 
 #ifdef CONFIG_COMPAT
 int compat_dccp_setsockopt(struct sock *sk, int level, int optname,
-                           char __user *optval, int optlen)
+                           char __user *optval, unsigned int optlen)
 {
         if (level != SOL_DCCP)
                 return inet_csk_compat_setsockopt(sk, level, optname,
diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c
index 77d40289653c..7a58c87baf17 100644
--- a/net/decnet/af_decnet.c
+++ b/net/decnet/af_decnet.c
@@ -157,7 +157,7 @@ static struct hlist_head dn_sk_hash[DN_SK_HASH_SIZE];
 static struct hlist_head dn_wild_sk;
 static atomic_t decnet_memory_allocated;
 
-static int __dn_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen, int flags);
+static int __dn_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen, int flags);
 static int __dn_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen, int flags);
 
 static struct hlist_head *dn_find_list(struct sock *sk)
@@ -1325,7 +1325,7 @@ out:
         return err;
 }
 
-static int dn_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
+static int dn_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen)
 {
         struct sock *sk = sock->sk;
         int err;
@@ -1337,7 +1337,7 @@ static int dn_setsockopt(struct socket *sock, int level, int optname, char __use
         return err;
 }
 
-static int __dn_setsockopt(struct socket *sock, int level,int optname, char __user *optval, int optlen, int flags)
+static int __dn_setsockopt(struct socket *sock, int level,int optname, char __user *optval, unsigned int optlen, int flags)
 {
         struct  sock *sk = sock->sk;
         struct dn_scp *scp = DN_SK(sk);
diff --git a/net/ieee802154/dgram.c b/net/ieee802154/dgram.c
index 51593a48f2dd..a413b1bf4465 100644
--- a/net/ieee802154/dgram.c
+++ b/net/ieee802154/dgram.c
@@ -414,7 +414,7 @@ static int dgram_getsockopt(struct sock *sk, int level, int optname,
 }
 
 static int dgram_setsockopt(struct sock *sk, int level, int optname,
-                    char __user *optval, int optlen)
+                    char __user *optval, unsigned int optlen)
 {
         struct dgram_sock *ro = dgram_sk(sk);
         int val;
diff --git a/net/ieee802154/raw.c b/net/ieee802154/raw.c
index 13198859982e..30e74eee07d6 100644
--- a/net/ieee802154/raw.c
+++ b/net/ieee802154/raw.c
@@ -244,7 +244,7 @@ static int raw_getsockopt(struct sock *sk, int level, int optname,
 }
 
 static int raw_setsockopt(struct sock *sk, int level, int optname,
-                    char __user *optval, int optlen)
+                    char __user *optval, unsigned int optlen)
 {
         return -EOPNOTSUPP;
 }
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c
index 22cd19ee44e5..4351ca2cf0b8 100644
--- a/net/ipv4/inet_connection_sock.c
+++ b/net/ipv4/inet_connection_sock.c
@@ -714,7 +714,7 @@ int inet_csk_compat_getsockopt(struct sock *sk, int level, int optname,
 EXPORT_SYMBOL_GPL(inet_csk_compat_getsockopt);
 
 int inet_csk_compat_setsockopt(struct sock *sk, int level, int optname,
-                               char __user *optval, int optlen)
+                               char __user *optval, unsigned int optlen)
 {
         const struct inet_connection_sock *icsk = inet_csk(sk);
 
diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 5a0693576e82..0c0b6e363a20 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -440,7 +440,7 @@ out:
  */
 
 static int do_ip_setsockopt(struct sock *sk, int level,
-                            int optname, char __user *optval, int optlen)
+                            int optname, char __user *optval, unsigned int optlen)
 {
         struct inet_sock *inet = inet_sk(sk);
         int val = 0, err;
@@ -950,7 +950,7 @@ e_inval:
 }
 
 int ip_setsockopt(struct sock *sk, int level,
-                int optname, char __user *optval, int optlen)
+                int optname, char __user *optval, unsigned int optlen)
 {
         int err;
 
@@ -975,7 +975,7 @@ EXPORT_SYMBOL(ip_setsockopt);
 
 #ifdef CONFIG_COMPAT
 int compat_ip_setsockopt(struct sock *sk, int level, int optname,
-                         char __user *optval, int optlen)
+                         char __user *optval, unsigned int optlen)
 {
         int err;
 
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index c43ec2d51ce2..630a56df7b47 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -931,7 +931,7 @@ static void mrtsock_destruct(struct sock *sk)
  *      MOSPF/PIM router set up we can clean this up.
  */
 
-int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, int optlen)
+int ip_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsigned int optlen)
 {
         int ret;
         struct vifctl vif;
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index ebb1e5848bc6..757c9171e7c2 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -741,7 +741,7 @@ out:	return ret;
 }
 
 static int do_raw_setsockopt(struct sock *sk, int level, int optname,
-                          char __user *optval, int optlen)
+                          char __user *optval, unsigned int optlen)
 {
         if (optname == ICMP_FILTER) {
                 if (inet_sk(sk)->num != IPPROTO_ICMP)
@@ -753,7 +753,7 @@ static int do_raw_setsockopt(struct sock *sk, int level, int optname,
 }
 
 static int raw_setsockopt(struct sock *sk, int level, int optname,
-                          char __user *optval, int optlen)
+                          char __user *optval, unsigned int optlen)
 {
         if (level != SOL_RAW)
                 return ip_setsockopt(sk, level, optname, optval, optlen);
@@ -762,7 +762,7 @@ static int raw_setsockopt(struct sock *sk, int level, int optname,
 
 #ifdef CONFIG_COMPAT
 static int compat_raw_setsockopt(struct sock *sk, int level, int optname,
-                                 char __user *optval, int optlen)
+                                 char __user *optval, unsigned int optlen)
 {
         if (level != SOL_RAW)
                 return compat_ip_setsockopt(sk, level, optname, optval, optlen);
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 21387ebabf00..5a15e7629d8e 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2032,7 +2032,7 @@ int tcp_disconnect(struct sock *sk, int flags)
  *      Socket option code for TCP.
  */
 static int do_tcp_setsockopt(struct sock *sk, int level,
-                int optname, char __user *optval, int optlen)
+                int optname, char __user *optval, unsigned int optlen)
 {
         struct tcp_sock *tp = tcp_sk(sk);
         struct inet_connection_sock *icsk = inet_csk(sk);
@@ -2220,7 +2220,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
 }
 
 int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
-                   int optlen)
+                   unsigned int optlen)
 {
         struct inet_connection_sock *icsk = inet_csk(sk);
 
@@ -2232,7 +2232,7 @@ int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
 
 #ifdef CONFIG_COMPAT
 int compat_tcp_setsockopt(struct sock *sk, int level, int optname,
-                          char __user *optval, int optlen)
+                          char __user *optval, unsigned int optlen)
 {
         if (level != SOL_TCP)
                 return inet_csk_compat_setsockopt(sk, level, optname,
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index ebaaa7f973d7..3326aff65906 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1359,7 +1359,7 @@ void udp_destroy_sock(struct sock *sk)
  *      Socket option code for UDP
  */
 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 *))
 {
         struct udp_sock *up = udp_sk(sk);
@@ -1441,7 +1441,7 @@ int udp_lib_setsockopt(struct sock *sk, int level, int optname,
 EXPORT_SYMBOL(udp_lib_setsockopt);
 
 int udp_setsockopt(struct sock *sk, int level, int optname,
-                   char __user *optval, int optlen)
+                   char __user *optval, unsigned int optlen)
 {
         if (level == SOL_UDP  ||  level == SOL_UDPLITE)
                 return udp_lib_setsockopt(sk, level, optname, optval, optlen,
@@ -1451,7 +1451,7 @@ int udp_setsockopt(struct sock *sk, int level, int optname,
 
 #ifdef CONFIG_COMPAT
 int compat_udp_setsockopt(struct sock *sk, int level, int optname,
-                          char __user *optval, int optlen)
+                          char __user *optval, unsigned int optlen)
 {
         if (level == SOL_UDP  ||  level == SOL_UDPLITE)
                 return udp_lib_setsockopt(sk, level, optname, optval, optlen,
diff --git a/net/ipv4/udp_impl.h b/net/ipv4/udp_impl.h
index 9f4a6165f722..aaad650d47d9 100644
--- a/net/ipv4/udp_impl.h
+++ b/net/ipv4/udp_impl.h
@@ -11,13 +11,13 @@ extern void 	__udp4_lib_err(struct sk_buff *, u32, struct udp_table *);
 extern int      udp_v4_get_port(struct sock *sk, unsigned short snum);
 
 extern int      udp_setsockopt(struct sock *sk, int level, int optname,
-                               char __user *optval, int optlen);
+                               char __user *optval, unsigned int optlen);
 extern int      udp_getsockopt(struct sock *sk, int level, int optname,
                                char __user *optval, int __user *optlen);
 
 #ifdef CONFIG_COMPAT
 extern int      compat_udp_setsockopt(struct sock *sk, int level, int optname,
-                                      char __user *optval, int optlen);
+                                      char __user *optval, unsigned int optlen);
 extern int      compat_udp_getsockopt(struct sock *sk, int level, int optname,
                                       char __user *optval, int __user *optlen);
 #endif
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 090675e269ee..716153941fc4 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -1281,7 +1281,7 @@ int ip6mr_sk_done(struct sock *sk)
  *      MOSPF/PIM router set up we can clean this up.
  */
 
-int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, int optlen)
+int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsigned int optlen)
 {
         int ret;
         struct mif6ctl vif;
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index f5e0682b402d..14f54eb5a7fc 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -123,7 +123,7 @@ struct ipv6_txoptions *ipv6_update_options(struct sock *sk,
 }
 
 static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
-                    char __user *optval, int optlen)
+                    char __user *optval, unsigned int optlen)
 {
         struct ipv6_pinfo *np = inet6_sk(sk);
         struct net *net = sock_net(sk);
@@ -773,7 +773,7 @@ e_inval:
 }
 
 int ipv6_setsockopt(struct sock *sk, int level, int optname,
-                    char __user *optval, int optlen)
+                    char __user *optval, unsigned int optlen)
 {
         int err;
 
@@ -801,7 +801,7 @@ EXPORT_SYMBOL(ipv6_setsockopt);
 
 #ifdef CONFIG_COMPAT
 int compat_ipv6_setsockopt(struct sock *sk, int level, int optname,
-                           char __user *optval, int optlen)
+                           char __user *optval, unsigned int optlen)
 {
         int err;
 
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 7d675b8d82d3..4f24570b0869 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -957,7 +957,7 @@ static int rawv6_geticmpfilter(struct sock *sk, int level, int optname,
 
 
 static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
-                            char __user *optval, int optlen)
+                            char __user *optval, unsigned int optlen)
 {
         struct raw6_sock *rp = raw6_sk(sk);
         int val;
@@ -1000,7 +1000,7 @@ static int do_rawv6_setsockopt(struct sock *sk, int level, int optname,
 }
 
 static int rawv6_setsockopt(struct sock *sk, int level, int optname,
-                          char __user *optval, int optlen)
+                          char __user *optval, unsigned int optlen)
 {
         switch(level) {
                 case SOL_RAW:
@@ -1024,7 +1024,7 @@ static int rawv6_setsockopt(struct sock *sk, int level, int optname,
 
 #ifdef CONFIG_COMPAT
 static int compat_rawv6_setsockopt(struct sock *sk, int level, int optname,
-                                   char __user *optval, int optlen)
+                                   char __user *optval, unsigned int optlen)
 {
         switch (level) {
         case SOL_RAW:
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index b265b7047d3e..3a60f12b34ed 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1044,7 +1044,7 @@ void udpv6_destroy_sock(struct sock *sk)
  *      Socket option code for UDP
  */
 int udpv6_setsockopt(struct sock *sk, int level, int optname,
-                     char __user *optval, int optlen)
+                     char __user *optval, unsigned int optlen)
 {
         if (level == SOL_UDP  ||  level == SOL_UDPLITE)
                 return udp_lib_setsockopt(sk, level, optname, optval, optlen,
@@ -1054,7 +1054,7 @@ int udpv6_setsockopt(struct sock *sk, int level, int optname,
 
 #ifdef CONFIG_COMPAT
 int compat_udpv6_setsockopt(struct sock *sk, int level, int optname,
-                            char __user *optval, int optlen)
+                            char __user *optval, unsigned int optlen)
 {
         if (level == SOL_UDP  ||  level == SOL_UDPLITE)
                 return udp_lib_setsockopt(sk, level, optname, optval, optlen,
diff --git a/net/ipv6/udp_impl.h b/net/ipv6/udp_impl.h
index 6bb303471e20..d7571046bfc4 100644
--- a/net/ipv6/udp_impl.h
+++ b/net/ipv6/udp_impl.h
@@ -16,10 +16,10 @@ extern int	udp_v6_get_port(struct sock *sk, unsigned short snum);
 extern int      udpv6_getsockopt(struct sock *sk, int level, int optname,
                                  char __user *optval, int __user *optlen);
 extern int      udpv6_setsockopt(struct sock *sk, int level, int optname,
-                                 char __user *optval, int optlen);
+                                 char __user *optval, unsigned int optlen);
 #ifdef CONFIG_COMPAT
 extern int      compat_udpv6_setsockopt(struct sock *sk, int level, int optname,
-                                        char __user *optval, int optlen);
+                                        char __user *optval, unsigned int optlen);
 extern int      compat_udpv6_getsockopt(struct sock *sk, int level, int optname,
                                        char __user *optval, int __user *optlen);
 #endif
diff --git a/net/ipx/af_ipx.c b/net/ipx/af_ipx.c
index f1118d92a191..66c7a20011f3 100644
--- a/net/ipx/af_ipx.c
+++ b/net/ipx/af_ipx.c
@@ -1292,7 +1292,7 @@ const char *ipx_device_name(struct ipx_interface *intrfc)
  * socket object. */
 
 static int ipx_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 opt;
diff --git a/net/irda/af_irda.c b/net/irda/af_irda.c
index 50b43c57d5d8..dd35641835f4 100644
--- a/net/irda/af_irda.c
+++ b/net/irda/af_irda.c
@@ -1826,7 +1826,7 @@ static int irda_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned lon
  *
  */
 static int irda_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 irda_sock *self = irda_sk(sk);
diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
index d985d163dcfc..bada1b9c670b 100644
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -1387,7 +1387,7 @@ static int iucv_sock_release(struct socket *sock)
 
 /* getsockopt and setsockopt */
 static int iucv_sock_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 iucv_sock *iucv = iucv_sk(sk);
diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c
index c45eee1c0e8d..7aa4fd170104 100644
--- a/net/llc/af_llc.c
+++ b/net/llc/af_llc.c
@@ -973,7 +973,7 @@ static int llc_ui_ioctl(struct socket *sock, unsigned int cmd,
  *      Set various connection specific parameters.
  */
 static int llc_ui_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 llc_sock *llc = llc_sk(sk);
diff --git a/net/netfilter/nf_sockopt.c b/net/netfilter/nf_sockopt.c
index 8ab829f86574..f042ae521557 100644
--- a/net/netfilter/nf_sockopt.c
+++ b/net/netfilter/nf_sockopt.c
@@ -113,7 +113,7 @@ static int nf_sockopt(struct sock *sk, u_int8_t pf, int val,
 }
 
 int nf_setsockopt(struct sock *sk, u_int8_t pf, int val, char __user *opt,
-                  int len)
+                  unsigned int len)
 {
         return nf_sockopt(sk, pf, val, opt, &len, 0);
 }
@@ -154,7 +154,7 @@ static int compat_nf_sockopt(struct sock *sk, u_int8_t pf, int val,
 }
 
 int compat_nf_setsockopt(struct sock *sk, u_int8_t pf,
-                int val, char __user *opt, int len)
+                int val, char __user *opt, unsigned int len)
 {
         return compat_nf_sockopt(sk, pf, val, opt, &len, 0);
 }
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index dd85320907cb..19e98007691c 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1150,7 +1150,7 @@ static void netlink_update_socket_mc(struct netlink_sock *nlk,
 }
 
 static int netlink_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 netlink_sock *nlk = nlk_sk(sk);
diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index ce1a34b99c23..7a834952f67f 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -301,7 +301,7 @@ void nr_destroy_socket(struct sock *sk)
  */
 
 static int nr_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 nr_sock *nr = nr_sk(sk);
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index d3d52c66cdc2..1238949e66a9 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1701,7 +1701,7 @@ static void packet_flush_mclist(struct sock *sk)
 }
 
 static int
-packet_setsockopt(struct socket *sock, int level, int optname, char __user *optval, int optlen)
+packet_setsockopt(struct socket *sock, int level, int optname, char __user *optval, unsigned int optlen)
 {
         struct sock *sk = sock->sk;
         struct packet_sock *po = pkt_sk(sk);
diff --git a/net/phonet/pep.c b/net/phonet/pep.c
index b8252d289cd7..5f32d217535b 100644
--- a/net/phonet/pep.c
+++ b/net/phonet/pep.c
@@ -742,7 +742,7 @@ static int pep_init(struct sock *sk)
 }
 
 static int pep_setsockopt(struct sock *sk, int level, int optname,
-                                char __user *optval, int optlen)
+                                char __user *optval, unsigned int optlen)
 {
         struct pep_sock *pn = pep_sk(sk);
         int val = 0, err = 0;
diff --git a/net/rds/af_rds.c b/net/rds/af_rds.c
index 6b58aeff4c7a..98e05382fd3c 100644
--- a/net/rds/af_rds.c
+++ b/net/rds/af_rds.c
@@ -248,7 +248,7 @@ static int rds_cong_monitor(struct rds_sock *rs, char __user *optval,
 }
 
 static int rds_setsockopt(struct socket *sock, int level, int optname,
-                          char __user *optval, int optlen)
+                          char __user *optval, unsigned int optlen)
 {
         struct rds_sock *rs = rds_sk_to_rs(sock->sk);
         int ret;
diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index 1e166c9685aa..502cce76621d 100644
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -370,7 +370,7 @@ void rose_destroy_socket(struct sock *sk)
  */
 
 static int rose_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 rose_sock *rose = rose_sk(sk);
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index bfe493ebf27c..a86afceaa94f 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -507,7 +507,7 @@ out:
  * set RxRPC socket options
  */
 static int rxrpc_setsockopt(struct socket *sock, int level, int optname,
-                            char __user *optval, int optlen)
+                            char __user *optval, unsigned int optlen)
 {
         struct rxrpc_sock *rx = rxrpc_sk(sock->sk);
         unsigned min_sec_level;
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 89af37a6c871..c8d05758661d 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -2027,7 +2027,8 @@ out:
  * instead a error will be indicated to the user.
  */
 static int sctp_setsockopt_disable_fragments(struct sock *sk,
-                                            char __user *optval, int optlen)
+                                             char __user *optval,
+                                             unsigned int optlen)
 {
         int val;
 
@@ -2043,7 +2044,7 @@ static int sctp_setsockopt_disable_fragments(struct sock *sk,
 }
 
 static int sctp_setsockopt_events(struct sock *sk, char __user *optval,
-                                        int optlen)
+                                  unsigned int optlen)
 {
         if (optlen > sizeof(struct sctp_event_subscribe))
                 return -EINVAL;
@@ -2064,7 +2065,7 @@ static int sctp_setsockopt_events(struct sock *sk, char __user *optval,
  * association is closed.
  */
 static int sctp_setsockopt_autoclose(struct sock *sk, char __user *optval,
-                                            int optlen)
+                                     unsigned int optlen)
 {
         struct sctp_sock *sp = sctp_sk(sk);
 
@@ -2318,7 +2319,8 @@ static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params,
 }
 
 static int sctp_setsockopt_peer_addr_params(struct sock *sk,
-                                            char __user *optval, int optlen)
+                                            char __user *optval,
+                                            unsigned int optlen)
 {
         struct sctp_paddrparams  params;
         struct sctp_transport   *trans = NULL;
@@ -2430,7 +2432,7 @@ static int sctp_setsockopt_peer_addr_params(struct sock *sk,
  */
 
 static int sctp_setsockopt_delayed_ack(struct sock *sk,
-                                            char __user *optval, int optlen)
+                                       char __user *optval, unsigned int optlen)
 {
         struct sctp_sack_info    params;
         struct sctp_transport   *trans = NULL;
@@ -2546,7 +2548,7 @@ static int sctp_setsockopt_delayed_ack(struct sock *sk,
  * by the change).  With TCP-style sockets, this option is inherited by
  * sockets derived from a listener socket.
  */
-static int sctp_setsockopt_initmsg(struct sock *sk, char __user *optval, int optlen)
+static int sctp_setsockopt_initmsg(struct sock *sk, char __user *optval, unsigned int optlen)
 {
         struct sctp_initmsg sinit;
         struct sctp_sock *sp = sctp_sk(sk);
@@ -2583,7 +2585,8 @@ static int sctp_setsockopt_initmsg(struct sock *sk, char __user *optval, int opt
  *   to this call if the caller is using the UDP model.
  */
 static int sctp_setsockopt_default_send_param(struct sock *sk,
-                                                char __user *optval, int optlen)
+                                              char __user *optval,
+                                              unsigned int optlen)
 {
         struct sctp_sndrcvinfo info;
         struct sctp_association *asoc;
@@ -2622,7 +2625,7 @@ static int sctp_setsockopt_default_send_param(struct sock *sk,
  * association peer's addresses.
  */
 static int sctp_setsockopt_primary_addr(struct sock *sk, char __user *optval,
-                                        int optlen)
+                                        unsigned int optlen)
 {
         struct sctp_prim prim;
         struct sctp_transport *trans;
@@ -2651,7 +2654,7 @@ static int sctp_setsockopt_primary_addr(struct sock *sk, char __user *optval,
  *  integer boolean flag.
  */
 static int sctp_setsockopt_nodelay(struct sock *sk, char __user *optval,
-                                        int optlen)
+                                   unsigned int optlen)
 {
         int val;
 
@@ -2676,7 +2679,8 @@ static int sctp_setsockopt_nodelay(struct sock *sk, char __user *optval,
  * be changed.
  *
  */
-static int sctp_setsockopt_rtoinfo(struct sock *sk, char __user *optval, int optlen) {
+static int sctp_setsockopt_rtoinfo(struct sock *sk, char __user *optval, unsigned int optlen)
+{
         struct sctp_rtoinfo rtoinfo;
         struct sctp_association *asoc;
 
@@ -2728,7 +2732,7 @@ static int sctp_setsockopt_rtoinfo(struct sock *sk, char __user *optval, int opt
  * See [SCTP] for more information.
  *
  */
-static int sctp_setsockopt_associnfo(struct sock *sk, char __user *optval, int optlen)
+static int sctp_setsockopt_associnfo(struct sock *sk, char __user *optval, unsigned int optlen)
 {
 
         struct sctp_assocparams assocparams;
@@ -2800,7 +2804,7 @@ static int sctp_setsockopt_associnfo(struct sock *sk, char __user *optval, int o
  * addresses and a user will receive both PF_INET6 and PF_INET type
  * addresses on the socket.
  */
-static int sctp_setsockopt_mappedv4(struct sock *sk, char __user *optval, int optlen)
+static int sctp_setsockopt_mappedv4(struct sock *sk, char __user *optval, unsigned int optlen)
 {
         int val;
         struct sctp_sock *sp = sctp_sk(sk);
@@ -2844,7 +2848,7 @@ static int sctp_setsockopt_mappedv4(struct sock *sk, char __user *optval, int op
  *    changed (effecting future associations only).
  * assoc_value:  This parameter specifies the maximum size in bytes.
  */
-static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, int optlen)
+static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, unsigned int optlen)
 {
         struct sctp_assoc_value params;
         struct sctp_association *asoc;
@@ -2899,7 +2903,7 @@ static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, int optl
  *   set primary request:
  */
 static int sctp_setsockopt_peer_primary_addr(struct sock *sk, char __user *optval,
-                                             int optlen)
+                                             unsigned int optlen)
 {
         struct sctp_sock        *sp;
         struct sctp_endpoint    *ep;
@@ -2950,7 +2954,7 @@ static int sctp_setsockopt_peer_primary_addr(struct sock *sk, char __user *optva
 }
 
 static int sctp_setsockopt_adaptation_layer(struct sock *sk, char __user *optval,
-                                          int optlen)
+                                            unsigned int optlen)
 {
         struct sctp_setadaptation adaptation;
 
@@ -2979,7 +2983,7 @@ static int sctp_setsockopt_adaptation_layer(struct sock *sk, char __user *optval
  * saved with outbound messages.
  */
 static int sctp_setsockopt_context(struct sock *sk, char __user *optval,
-                                   int optlen)
+                                   unsigned int optlen)
 {
         struct sctp_assoc_value params;
         struct sctp_sock *sp;
@@ -3030,7 +3034,7 @@ static int sctp_setsockopt_context(struct sock *sk, char __user *optval,
  */
 static int sctp_setsockopt_fragment_interleave(struct sock *sk,
                                                char __user *optval,
-                                               int optlen)
+                                               unsigned int optlen)
 {
         int val;
 
@@ -3063,7 +3067,7 @@ static int sctp_setsockopt_fragment_interleave(struct sock *sk,
  */
 static int sctp_setsockopt_partial_delivery_point(struct sock *sk,
                                                   char __user *optval,
-                                                  int optlen)
+                                                  unsigned int optlen)
 {
         u32 val;
 
@@ -3096,7 +3100,7 @@ static int sctp_setsockopt_partial_delivery_point(struct sock *sk,
  */
 static int sctp_setsockopt_maxburst(struct sock *sk,
                                     char __user *optval,
-                                    int optlen)
+                                    unsigned int optlen)
 {
         struct sctp_assoc_value params;
         struct sctp_sock *sp;
@@ -3140,8 +3144,8 @@ static int sctp_setsockopt_maxburst(struct sock *sk,
  * will only effect future associations on the socket.
  */
 static int sctp_setsockopt_auth_chunk(struct sock *sk,
-                                    char __user *optval,
-                                    int optlen)
+                                      char __user *optval,
+                                      unsigned int optlen)
 {
         struct sctp_authchunk val;
 
@@ -3172,8 +3176,8 @@ static int sctp_setsockopt_auth_chunk(struct sock *sk,
  * endpoint requires the peer to use.
  */
 static int sctp_setsockopt_hmac_ident(struct sock *sk,
-                                    char __user *optval,
-                                    int optlen)
+                                      char __user *optval,
+                                      unsigned int optlen)
 {
         struct sctp_hmacalgo *hmacs;
         u32 idents;
@@ -3215,7 +3219,7 @@ out:
  */
 static int sctp_setsockopt_auth_key(struct sock *sk,
                                     char __user *optval,
-                                    int optlen)
+                                    unsigned int optlen)
 {
         struct sctp_authkey *authkey;
         struct sctp_association *asoc;
@@ -3260,8 +3264,8 @@ out:
  * the association shared key.
  */
 static int sctp_setsockopt_active_key(struct sock *sk,
-                                        char __user *optval,
-                                        int optlen)
+                                      char __user *optval,
+                                      unsigned int optlen)
 {
         struct sctp_authkeyid val;
         struct sctp_association *asoc;
@@ -3288,8 +3292,8 @@ static int sctp_setsockopt_active_key(struct sock *sk,
  * This set option will delete a shared secret key from use.
  */
 static int sctp_setsockopt_del_key(struct sock *sk,
-                                        char __user *optval,
-                                        int optlen)
+                                   char __user *optval,
+                                   unsigned int optlen)
 {
         struct sctp_authkeyid val;
         struct sctp_association *asoc;
@@ -3332,7 +3336,7 @@ static int sctp_setsockopt_del_key(struct sock *sk,
  *   optlen  - the size of the buffer.
  */
 SCTP_STATIC int sctp_setsockopt(struct sock *sk, int level, int optname,
-                                char __user *optval, int optlen)
+                                char __user *optval, unsigned int optlen)
 {
         int retval = 0;
 
diff --git a/net/socket.c b/net/socket.c
index 41e8847508aa..75655365b5fd 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2391,7 +2391,7 @@ int kernel_getsockopt(struct socket *sock, int level, int optname,
 }
 
 int kernel_setsockopt(struct socket *sock, int level, int optname,
-                        char *optval, int optlen)
+                        char *optval, unsigned int optlen)
 {
         mm_segment_t oldfs = get_fs();
         int err;
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index e8254e809b79..e6d9abf7440e 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -1658,7 +1658,7 @@ restart:
  */
 
 static int setsockopt(struct socket *sock,
-                      int lvl, int opt, char __user *ov, int ol)
+                      int lvl, int opt, char __user *ov, unsigned int ol)
 {
         struct sock *sk = sock->sk;
         struct tipc_port *tport = tipc_sk_port(sk);
diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index 5e6c072c64d3..7fa9c7ad3d3b 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -409,7 +409,7 @@ static void x25_destroy_socket(struct sock *sk)
  */
 
 static int x25_setsockopt(struct socket *sock, int level, int optname,
-                          char __user *optval, int optlen)
+                          char __user *optval, unsigned int optlen)
 {
         int opt;
         struct sock *sk = sock->sk;