From: Luiz Augusto von Dentz <luiz.dentz@gmail.com>
To: davem@davemloft.net, kuba@kernel.org
Cc: linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org,
dan.carpenter@oracle.com,
Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Subject: [PATCH 05/15] Bluetooth: HCI: Use skb_pull_data to parse Inquiry Result event
Date: Tue, 30 Nov 2021 16:02:05 -0800 [thread overview]
Message-ID: <20211201000215.1134831-6-luiz.dentz@gmail.com> (raw)
In-Reply-To: <20211201000215.1134831-1-luiz.dentz@gmail.com>
From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This uses skb_pull_data to check the Inquiry Result events received
have the minimum required length.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
---
include/net/bluetooth/hci.h | 5 +++++
net/bluetooth/hci_event.c | 19 ++++++++++++++-----
2 files changed, 19 insertions(+), 5 deletions(-)
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 3f57fd677b67..55466bfb972a 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -2028,6 +2028,11 @@ struct inquiry_info {
__le16 clock_offset;
} __packed;
+struct hci_ev_inquiry_result {
+ __u8 num;
+ struct inquiry_info info[];
+};
+
#define HCI_EV_CONN_COMPLETE 0x03
struct hci_ev_conn_complete {
__u8 status;
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index b27a4ad647ca..0bf062f6f262 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -3180,13 +3180,21 @@ static void hci_inquiry_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
static void hci_inquiry_result_evt(struct hci_dev *hdev, struct sk_buff *skb)
{
+ struct hci_ev_inquiry_result *ev;
struct inquiry_data data;
- struct inquiry_info *info = (void *) (skb->data + 1);
- int num_rsp = *((__u8 *) skb->data);
+ int i;
- BT_DBG("%s num_rsp %d", hdev->name, num_rsp);
+ ev = hci_ev_skb_pull(hdev, skb, HCI_EV_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_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))
@@ -3194,7 +3202,8 @@ static void hci_inquiry_result_evt(struct hci_dev *hdev, struct sk_buff *skb)
hci_dev_lock(hdev);
- for (; num_rsp; num_rsp--, info++) {
+ for (i = 0; i < ev->num; i++) {
+ struct inquiry_info *info = &ev->info[i];
u32 flags;
bacpy(&data.bdaddr, &info->bdaddr);
--
2.33.1
next prev parent reply other threads:[~2021-12-01 0:03 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-01 0:02 [PATCH 00/15] Rework parsing of HCI events Luiz Augusto von Dentz
2021-12-01 0:02 ` [PATCH 01/15] skbuff: introduce skb_pull_data Luiz Augusto von Dentz
2021-12-01 1:11 ` Jakub Kicinski
2021-12-01 2:16 ` Luiz Augusto von Dentz
2021-12-01 2:27 ` Jakub Kicinski
2021-12-01 7:22 ` Marcel Holtmann
2021-12-01 15:22 ` Jakub Kicinski
2021-12-01 5:20 ` Dan Carpenter
2021-12-01 0:02 ` [PATCH 02/15] Bluetooth: HCI: Use skb_pull_data to parse BR/EDR events Luiz Augusto von Dentz
2021-12-01 15:06 ` kernel test robot
2021-12-01 0:02 ` [PATCH 03/15] Bluetooth: HCI: Use skb_pull_data to parse Command Complete event Luiz Augusto von Dentz
2021-12-01 0:02 ` [PATCH 04/15] Bluetooth: HCI: Use skb_pull_data to parse Number of Complete Packets event Luiz Augusto von Dentz
2021-12-01 0:02 ` Luiz Augusto von Dentz [this message]
2021-12-01 0:02 ` [PATCH 06/15] Bluetooth: HCI: Use skb_pull_data to parse Inquiry Result with RSSI event Luiz Augusto von Dentz
2021-12-01 0:02 ` [PATCH 07/15] Bluetooth: HCI: Use skb_pull_data to parse Extended Inquiry Result event Luiz Augusto von Dentz
2021-12-01 0:02 ` [PATCH 08/15] Bluetooth: HCI: Use skb_pull_data to parse LE Metaevents Luiz Augusto von Dentz
2021-12-01 0:02 ` [PATCH 09/15] Bluetooth: HCI: Use skb_pull_data to parse LE Advertising Report event Luiz Augusto von Dentz
2021-12-01 0:02 ` [PATCH 10/15] Bluetooth: HCI: Use skb_pull_data to parse LE Ext " Luiz Augusto von Dentz
2021-12-01 0:02 ` [PATCH 11/15] Bluetooth: HCI: Use skb_pull_data to parse LE Direct " Luiz Augusto von Dentz
2021-12-01 0:02 ` [PATCH 12/15] Bluetooth: hci_event: Use of a function table to handle HCI events Luiz Augusto von Dentz
2021-12-01 1:54 ` kernel test robot
2021-12-01 3:22 ` kernel test robot
2021-12-01 3:22 ` kernel test robot
2022-01-25 14:46 ` Mike Lothian
2022-03-12 1:56 ` Mike Lothian
2022-03-12 14:45 ` Dan Carpenter
2022-03-14 13:14 ` Mike Lothian
2021-12-01 0:02 ` [PATCH 13/15] Bluetooth: hci_event: Use of a function table to handle LE subevents Luiz Augusto von Dentz
2021-12-01 0:02 ` [PATCH 14/15] Bluetooth: hci_event: Use of a function table to handle Command Complete Luiz Augusto von Dentz
2021-12-01 0:02 ` [PATCH 15/15] Bluetooth: hci_event: Use of a function table to handle Command Status Luiz Augusto von Dentz
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