diff options
author | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2021-12-01 10:54:58 -0800 |
---|---|---|
committer | Marcel Holtmann <marcel@holtmann.org> | 2021-12-07 17:05:50 +0100 |
commit | 70a6b8de6af5c3e517bfd2ce8dccbd65c3f5bb4f (patch) | |
tree | a80e9283492801ef89c7127970bdc3b3707e6965 | |
parent | 8d08d324fdcb7729f22b236a3e20fa37a8a29e43 (diff) | |
download | linux-70a6b8de6af5c3e517bfd2ce8dccbd65c3f5bb4f.tar.bz2 |
Bluetooth: HCI: Use skb_pull_data to parse Extended Inquiry Result event
This uses skb_pull_data to check the Extended Inquiry Result events
received have the minimum required length.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
-rw-r--r-- | include/net/bluetooth/hci.h | 5 | ||||
-rw-r--r-- | net/bluetooth/hci_event.c | 20 |
2 files changed, 20 insertions, 5 deletions
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h index d25afd92a46e..9e721e6efef3 100644 --- a/include/net/bluetooth/hci.h +++ b/include/net/bluetooth/hci.h @@ -2273,6 +2273,11 @@ struct extended_inquiry_info { __u8 data[240]; } __packed; +struct hci_ev_ext_inquiry_result { + __u8 num; + struct extended_inquiry_info info[]; +} __packed; + #define HCI_EV_KEY_REFRESH_COMPLETE 0x30 struct hci_ev_key_refresh_complete { __u8 status; diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index 6560dca8c5ce..89c263c1883f 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -5186,14 +5186,23 @@ static inline size_t eir_get_length(u8 *eir, size_t eir_len) static void hci_extended_inquiry_result_evt(struct hci_dev *hdev, struct sk_buff *skb) { + struct hci_ev_ext_inquiry_result *ev; struct inquiry_data data; - struct extended_inquiry_info *info = (void *) (skb->data + 1); - int num_rsp = *((__u8 *) skb->data); size_t eir_len; + int i; - BT_DBG("%s num_rsp %d", hdev->name, num_rsp); + ev = hci_ev_skb_pull(hdev, skb, HCI_EV_EXTENDED_INQUIRY_RESULT, + sizeof(*ev)); + if (!ev) + return; - if (!num_rsp || skb->len < num_rsp * sizeof(*info) + 1) + if (!hci_ev_skb_pull(hdev, skb, HCI_EV_EXTENDED_INQUIRY_RESULT, + flex_array_size(ev, info, ev->num))) + return; + + BT_DBG("%s num %d", hdev->name, ev->num); + + if (!ev->num) return; if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ)) @@ -5201,7 +5210,8 @@ static void hci_extended_inquiry_result_evt(struct hci_dev *hdev, hci_dev_lock(hdev); - for (; num_rsp; num_rsp--, info++) { + for (i = 0; i < ev->num; i++) { + struct extended_inquiry_info *info = &ev->info[i]; u32 flags; bool name_known; |