From: Luiz Augusto von Dentz <[email protected]>
This uses skb_pull to check the LE Direct Advertising Report events
received have the minimum required length.
Signed-off-by: Luiz Augusto von Dentz <[email protected]>
---
include/net/bluetooth/hci.h | 7 ++++++-
net/bluetooth/hci_event.c | 26 +++++++++++++++++++-------
2 files changed, 25 insertions(+), 8 deletions(-)
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 9600cc6ad952..13b7c7747bd1 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -2382,7 +2382,7 @@ struct hci_ev_le_data_len_change {
#define HCI_EV_LE_DIRECT_ADV_REPORT 0x0B
struct hci_ev_le_direct_adv_info {
- __u8 evt_type;
+ __u8 type;
__u8 bdaddr_type;
bdaddr_t bdaddr;
__u8 direct_addr_type;
@@ -2390,6 +2390,11 @@ struct hci_ev_le_direct_adv_info {
__s8 rssi;
} __packed;
+struct hci_ev_le_direct_adv_report {
+ __u8 num;
+ struct hci_ev_le_direct_adv_info info[];
+} __packed;
+
#define HCI_EV_LE_PHY_UPDATE_COMPLETE 0x0c
struct hci_ev_le_phy_update_complete {
__u8 status;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 3fdab3fe427d..f56520eececa 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -6592,19 +6592,31 @@ static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev,
static void hci_le_direct_adv_report_evt(struct hci_dev *hdev,
struct sk_buff *skb)
{
- u8 num_reports = skb->data[0];
- struct hci_ev_le_direct_adv_info *ev = (void *)&skb->data[1];
+ struct hci_ev_le_direct_adv_report *ev;
+ int i;
+
+ ev = hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT,
+ sizeof(*ev));
+ if (!ev)
+ return;
- if (!num_reports || skb->len < num_reports * sizeof(*ev) + 1)
+ if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT,
+ flex_array_size(ev, info, ev->num)))
+ return;
+
+ if (!ev->num)
return;
hci_dev_lock(hdev);
- for (; num_reports; num_reports--, ev++)
- process_adv_report(hdev, ev->evt_type, &ev->bdaddr,
- ev->bdaddr_type, &ev->direct_addr,
- ev->direct_addr_type, ev->rssi, NULL, 0,
+ for (i = 0; i < ev->num; i++) {
+ struct hci_ev_le_direct_adv_info *info = &ev->info[i];
+
+ process_adv_report(hdev, info->type, &info->bdaddr,
+ info->bdaddr_type, &info->direct_addr,
+ info->direct_addr_type, info->rssi, NULL, 0,
false);
+ }
hci_dev_unlock(hdev);
}
--
2.30.2