net/core: remove address space warnings on verify_iovec()

move_addr_to_kernel() and copy_from_user() requires their argument
as __user pointer but were missing proper markups. Add it.
This removes following warnings from sparse.

 net/core/iovec.c:44:52: warning: incorrect type in argument 1 (different address spaces)
 net/core/iovec.c:44:52:    expected void [noderef] <asn:1>*uaddr
 net/core/iovec.c:44:52:    got void *msg_name
 net/core/iovec.c:55:34: warning: incorrect type in argument 2 (different address spaces)
 net/core/iovec.c:55:34:    expected void const [noderef] <asn:1>*from
 net/core/iovec.c:55:34:    got struct iovec *msg_iov

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 2 deletions

diff --git a/net/core/iovec.c b/net/core/iovec.c
index 1cd98df412df..f4657c2127b4 100644
--- a/net/core/iovec.c
+++ b/net/core/iovec.c
@@ -41,7 +41,9 @@ int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr *address,
 
         if (m->msg_namelen) {
                 if (mode == VERIFY_READ) {
-                        err = move_addr_to_kernel(m->msg_name, m->msg_namelen,
+                        void __user *namep;
+                        namep = (void __user __force *) m->msg_name;
+                        err = move_addr_to_kernel(namep, m->msg_namelen,
                                                   address);
                         if (err < 0)
                                 return err;
@@ -52,7 +54,7 @@ int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr *address,
         }
 
         size = m->msg_iovlen * sizeof(struct iovec);
-        if (copy_from_user(iov, m->msg_iov, size))
+        if (copy_from_user(iov, (void __user __force *) m->msg_iov, size))
                 return -EFAULT;
 
         m->msg_iov = iov;