Bluetooth: Add 'eir_len' param to mgmt_device_found()

This patch adds a new parameter to mgmt_device_found() to inform
the length of 'eir' pointer.

EIR data from LE advertising report event doesn't have a fixed length
as EIR data from extended inquiry result event does. We needed to
change mgmt_device_found() so it copies 'eir_len' bytes instead of
HCI_MAX_EIR_LENGTH.

Signed-off-by: Andre Guedes <andre.guedes@openbossa.org>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

include/net/bluetooth/hci_core.h

@@ -925,7 +925,7 @@ int mgmt_read_local_oob_data_reply_complete(struct hci_dev *hdev, u8 *hash,
 						u8 *randomizer, u8 status);
 int mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
 					u8 addr_type, u8 *dev_class, s8 rssi,
-					u8 cfm_name, u8 *eir);
+					u8 cfm_name, u8 *eir, u8 eir_len);
 int mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *name);
 int mgmt_start_discovery_failed(struct hci_dev *hdev, u8 status);
 int mgmt_stop_discovery_failed(struct hci_dev *hdev, u8 status);

net/bluetooth/hci_event.c

@@ -1608,7 +1608,8 @@ static inline void hci_inquiry_result_evt(struct hci_dev *hdev, struct sk_buff *
 
 		name_known = hci_inquiry_cache_update(hdev, &data, false);
 		mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
-					info->dev_class, 0, !name_known, NULL);
+					info->dev_class, 0, !name_known,
+					NULL, 0);
 	}
 
 	hci_dev_unlock(hdev);
@@ -2705,7 +2706,7 @@ static inline void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, struct
 								false);
 			mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
 						info->dev_class, info->rssi,
-						!name_known, NULL);
+						!name_known, NULL, 0);
 		}
 	} else {
 		struct inquiry_info_with_rssi *info = (void *) (skb->data + 1);
@@ -2723,7 +2724,7 @@ static inline void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, struct
 								false);
 			mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
 						info->dev_class, info->rssi,
-						!name_known, NULL);
+						!name_known, NULL, 0);
 		}
 	}
 
@@ -2900,7 +2901,8 @@ static inline void hci_extended_inquiry_result_evt(struct hci_dev *hdev, struct
 		name_known = hci_inquiry_cache_update(hdev, &data, name_known);
 		mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
 						info->dev_class, info->rssi,
-						!name_known, info->data);
+						!name_known, info->data,
+						sizeof(info->data));
 	}
 
 	hci_dev_unlock(hdev);

net/bluetooth/mgmt.c

@@ -2780,10 +2780,13 @@ int mgmt_read_local_oob_data_reply_complete(struct hci_dev *hdev, u8 *hash,
 
 int mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
 				u8 addr_type, u8 *dev_class, s8 rssi,
-				u8 cfm_name, u8 *eir)
+				u8 cfm_name, u8 *eir, u8 eir_len)
 {
 	struct mgmt_ev_device_found ev;
 
+	if (eir_len > sizeof(ev.eir))
+		return -EINVAL;
+
 	memset(&ev, 0, sizeof(ev));
 
 	bacpy(&ev.addr.bdaddr, bdaddr);
@@ -2792,7 +2795,7 @@ int mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
 	ev.confirm_name = cfm_name;
 
 	if (eir)
-		memcpy(ev.eir, eir, sizeof(ev.eir));
+		memcpy(ev.eir, eir, eir_len);
 
 	if (dev_class)
 		memcpy(ev.dev_class, dev_class, sizeof(ev.dev_class));