BLUETOOTH: Fix unaligned access in hci_send_to_sock.

The "u16 *" derefs of skb->data need to be wrapped inside of
a get_unaligned().

Thanks to Gustavo Zacarias for the bug report.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Adrian Bunk <bunk@stusta.de>

diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 97bdec73d17e9fcbc4ffdfcb75c5613c3b9e9c44..4e86ff478352a4078a27e1a57061809a4560f855 100644 (file)
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -121,10 +121,13 @@ void hci_send_to_sock(struct hci_dev *hdev, struct sk_buff *skb)
                        if (!hci_test_bit(evt, &flt->event_mask))
                                continue;
 
-                       if (flt->opcode && ((evt == HCI_EV_CMD_COMPLETE && 
-                                       flt->opcode != *(__u16 *)(skb->data + 3)) ||
-                                       (evt == HCI_EV_CMD_STATUS && 
-                                       flt->opcode != *(__u16 *)(skb->data + 4))))
+                       if (flt->opcode &&
+                           ((evt == HCI_EV_CMD_COMPLETE &&
+                             flt->opcode !=
+                             get_unaligned((__u16 *)(skb->data + 3))) ||
+                            (evt == HCI_EV_CMD_STATUS &&
+                             flt->opcode !=
+                             get_unaligned((__u16 *)(skb->data + 4)))))
                                continue;
                }