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authorJaganath Kanakkassery <jaganath.k.os@gmail.com>2017-10-25 10:58:48 +0530
committerMarcel Holtmann <marcel@holtmann.org>2017-10-29 14:07:10 +0100
commitf17d858ed0a48270db4368d8cf370e3839ee6f4f (patch)
tree975b67fd9b1bf35c27320b25f11b8fa508d69a12 /net/bluetooth
parent858ff38af77fc660092e82474ecc6ac135ed29fe (diff)
downloadlinux-f17d858ed0a48270db4368d8cf370e3839ee6f4f.tar.bz2
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>
Diffstat (limited to 'net/bluetooth')
-rw-r--r--net/bluetooth/hci_conn.c2
-rw-r--r--net/bluetooth/hci_request.c5
-rw-r--r--net/bluetooth/hci_request.h1
-rw-r--r--net/bluetooth/mgmt.c1
4 files changed, 8 insertions, 1 deletions
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index dc59eae54717..746adcb62259 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -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);
}
diff --git a/net/bluetooth/hci_request.c b/net/bluetooth/hci_request.c
index b73ac149de34..7f28d17dc792 100644
--- a/net/bluetooth/hci_request.c
+++ b/net/bluetooth/hci_request.c
@@ -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)
{
diff --git a/net/bluetooth/hci_request.h b/net/bluetooth/hci_request.h
index dde77bd59f91..702beb140d9f 100644
--- a/net/bluetooth/hci_request.h
+++ b/net/bluetooth/hci_request.h
@@ -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,
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 1fba2a03f8ae..07a3cc29f426 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -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,