net: relax rtnl_dereference()

[net-next-2.6.git] / net / socket.c

diff --git a/net/socket.c b/net/socket.c
index 7848d12f5e4df22ace343275b24f53289a607e19..717a5f1c8792baca7fd6079ca075851e1849fcdd 100644 (file)
--- a/net/socket.c
+++ b/net/socket.c
@@ -1918,7 +1918,8 @@ SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags)
                 * Afterwards, it will be a kernel pointer. Thus the compiler-assisted
                 * checking falls down on this.
                 */
-               if (copy_from_user(ctl_buf, (void __user *)msg_sys.msg_control,
+               if (copy_from_user(ctl_buf,
+                                  (void __user __force *)msg_sys.msg_control,
                                   ctl_len))
                        goto out_freectl;
                msg_sys.msg_control = ctl_buf;
@@ -3053,14 +3054,19 @@ int kernel_getsockopt(struct socket *sock, int level, int optname,
                        char *optval, int *optlen)
 {
        mm_segment_t oldfs = get_fs();
+       char __user *uoptval;
+       int __user *uoptlen;
        int err;
 
+       uoptval = (char __user __force *) optval;
+       uoptlen = (int __user __force *) optlen;
+
        set_fs(KERNEL_DS);
        if (level == SOL_SOCKET)
-               err = sock_getsockopt(sock, level, optname, optval, optlen);
+               err = sock_getsockopt(sock, level, optname, uoptval, uoptlen);
        else
-               err = sock->ops->getsockopt(sock, level, optname, optval,
-                                           optlen);
+               err = sock->ops->getsockopt(sock, level, optname, uoptval,
+                                           uoptlen);
        set_fs(oldfs);
        return err;
 }
@@ -3070,13 +3076,16 @@ int kernel_setsockopt(struct socket *sock, int level, int optname,
                        char *optval, unsigned int optlen)
 {
        mm_segment_t oldfs = get_fs();
+       char __user *uoptval;
        int err;
 
+       uoptval = (char __user __force *) optval;
+
        set_fs(KERNEL_DS);
        if (level == SOL_SOCKET)
-               err = sock_setsockopt(sock, level, optname, optval, optlen);
+               err = sock_setsockopt(sock, level, optname, uoptval, optlen);
        else
-               err = sock->ops->setsockopt(sock, level, optname, optval,
+               err = sock->ops->setsockopt(sock, level, optname, uoptval,
                                            optlen);
        set_fs(oldfs);
        return err;