Merge branch 'v3.10/topic/gator' of git://git.linaro.org/kernel/linux-linaro-stable...

[firefly-linux-kernel-4.4.55.git] / net / compat.c

diff --git a/net/compat.c b/net/compat.c
index f0a1ba6c8086acc65a87e519fca48853a3bd091e..f50161fb812eace2eb659ae78bf12062c608b5b6 100644 (file)
--- a/net/compat.c
+++ b/net/compat.c
@@ -71,6 +71,8 @@ int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
            __get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
            __get_user(kmsg->msg_flags, &umsg->msg_flags))
                return -EFAULT;
+       if (kmsg->msg_namelen > sizeof(struct sockaddr_storage))
+               kmsg->msg_namelen = sizeof(struct sockaddr_storage);
        kmsg->msg_name = compat_ptr(tmp1);
        kmsg->msg_iov = compat_ptr(tmp2);
        kmsg->msg_control = compat_ptr(tmp3);
@@ -91,7 +93,8 @@ int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
                        if (err < 0)
                                return err;
                }
-               kern_msg->msg_name = kern_address;
+               if (kern_msg->msg_name)
+                       kern_msg->msg_name = kern_address;
        } else
                kern_msg->msg_name = NULL;
 
@@ -777,21 +780,16 @@ asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
        if (flags & MSG_CMSG_COMPAT)
                return -EINVAL;
 
-       if (COMPAT_USE_64BIT_TIME)
-               return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
-                                     flags | MSG_CMSG_COMPAT,
-                                     (struct timespec *) timeout);
-
        if (timeout == NULL)
                return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
                                      flags | MSG_CMSG_COMPAT, NULL);
 
-       if (get_compat_timespec(&ktspec, timeout))
+       if (compat_get_timespec(&ktspec, timeout))
                return -EFAULT;
 
        datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
                                   flags | MSG_CMSG_COMPAT, &ktspec);
-       if (datagrams > 0 && put_compat_timespec(&ktspec, timeout))
+       if (datagrams > 0 && compat_put_timespec(&ktspec, timeout))
                datagrams = -EFAULT;
 
        return datagrams;