[Bluetooth] Add compat handling for timestamp structure

The timestamp structure needs special handling in case of compat
programs. Use the same wrapping method the network core uses.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 16 insertions, 1 deletions

diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 1dae3dfc66a..68198a78896 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -37,6 +37,7 @@
 #include <linux/skbuff.h>
 #include <linux/workqueue.h>
 #include <linux/interrupt.h>
+#include <linux/compat.h>
 #include <linux/socket.h>
 #include <linux/ioctl.h>
 #include <net/sock.h>
@@ -342,9 +343,23 @@ static inline void hci_sock_cmsg(struct sock *sk, struct msghdr *msg, struct sk_
 
         if (mask & HCI_CMSG_TSTAMP) {
                 struct timeval tv;
+                void *data;
+                int len;
 
                 skb_get_timestamp(skb, &tv);
-                put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, sizeof(tv), &tv);
+
+                if (msg->msg_flags & MSG_CMSG_COMPAT) {
+                        struct compat_timeval ctv;
+                        ctv.tv_sec = tv.tv_sec;
+                        ctv.tv_usec = tv.tv_usec;
+                        data = &ctv;
+                        len = sizeof(ctv);
+                } else {
+                        data = &tv;
+                        len = sizeof(tv);
+                }
+
+                put_cmsg(msg, SOL_HCI, HCI_CMSG_TSTAMP, len, data);
         }
 }