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Bluetooth: Fix potential memory leak 

If command is added to req then it should be freed in case if
hdev is down or HCI_ADVERTISING flag is set.

This introduces a helper in hci_request to purge the cmd_q
to make cmd_q internal to hci_request which is used to fix
the leak.

This also replace accessing of cmd_q in hci_conn with the
new helper.

Signed-off-by: Jaganath Kanakkassery <jaganathx.kanakkassery@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Jaganath Kanakkassery 2017-10-25 10:58:48 +05:30 committed by Marcel Holtmann
parent 858ff38af7
commit f17d858ed0
4 changed files with 8 additions and 1 deletions
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2
net/bluetooth/hci_conn.c
View File

@ -907,7 +907,7 @@ struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
*/
if (hci_dev_test_flag(hdev, HCI_LE_SCAN) &&
hdev->le_scan_type == LE_SCAN_ACTIVE) {
skb_queue_purge(&req.cmd_q);
hci_req_purge(&req);
hci_conn_del(conn);
return ERR_PTR(-EBUSY);
}

5
net/bluetooth/hci_request.c
View File

@ -41,6 +41,11 @@ void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
req->err = 0;
}
void hci_req_purge(struct hci_request *req)
{
skb_queue_purge(&req->cmd_q);
}
static int req_run(struct hci_request *req, hci_req_complete_t complete,
hci_req_complete_skb_t complete_skb)
{

1
net/bluetooth/hci_request.h
View File

@ -36,6 +36,7 @@ struct hci_request {
};
void hci_req_init(struct hci_request *req, struct hci_dev *hdev);
void hci_req_purge(struct hci_request *req);
int hci_req_run(struct hci_request *req, hci_req_complete_t complete);
int hci_req_run_skb(struct hci_request *req, hci_req_complete_skb_t complete);
void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,

1
net/bluetooth/mgmt.c
View File

@ -6383,6 +6383,7 @@ static int remove_advertising(struct sock *sk, struct hci_dev *hdev,
if (skb_queue_empty(&req.cmd_q) ||
!hdev_is_powered(hdev) ||
hci_dev_test_flag(hdev, HCI_ADVERTISING)) {
hci_req_purge(&req);
rp.instance = cp->instance;
err = mgmt_cmd_complete(sk, hdev->id,
MGMT_OP_REMOVE_ADVERTISING,