Bluetooth: Fix using hci_conn_get() for hci_conn pointers

Wherever we keep hci_conn pointers around we should be using
hci_conn_get/put to ensure that they stay valid. This patch fixes
all places violating against the principle currently.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index faff624..4ecc9d5 100644 (file)
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -595,6 +595,7 @@ void hci_le_conn_failed(struct hci_conn *conn, u8 status)
                                           conn->dst_type);
        if (params && params->conn) {
                hci_conn_drop(params->conn);
+               hci_conn_put(params->conn);
                params->conn = NULL;
        }
 

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 9b71459..ed60d37 100644 (file)
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -2541,6 +2541,7 @@ static void hci_pend_le_actions_clear(struct hci_dev *hdev)
        list_for_each_entry(p, &hdev->le_conn_params, list) {
                if (p->conn) {
                        hci_conn_drop(p->conn);
+                       hci_conn_put(p->conn);
                        p->conn = NULL;
                }
                list_del_init(&p->action);
@@ -3734,8 +3735,10 @@ void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type)
        if (!params)
                return;
 
-       if (params->conn)
+       if (params->conn) {
                hci_conn_drop(params->conn);
+               hci_conn_put(params->conn);
+       }
 
        list_del(&params->action);
        list_del(&params->list);
@@ -3767,8 +3770,10 @@ void hci_conn_params_clear_all(struct hci_dev *hdev)
        struct hci_conn_params *params, *tmp;
 
        list_for_each_entry_safe(params, tmp, &hdev->le_conn_params, list) {
-               if (params->conn)
+               if (params->conn) {
                        hci_conn_drop(params->conn);
+                       hci_conn_put(params->conn);
+               }
                list_del(&params->action);
                list_del(&params->list);
                kfree(params);

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index d2ee162..e6a496a 100644 (file)
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -4231,6 +4231,7 @@ static void hci_le_conn_complete_evt(struct hci_dev *hdev, struct sk_buff *skb)
                list_del_init(&params->action);
                if (params->conn) {
                        hci_conn_drop(params->conn);
+                       hci_conn_put(params->conn);
                        params->conn = NULL;
                }
        }
@@ -4322,7 +4323,7 @@ static void check_pending_le_conn(struct hci_dev *hdev, bdaddr_t *addr,
                 * the parameters get removed and keep the reference
                 * count consistent once the connection is established.
                 */
-               params->conn = conn;
+               params->conn = hci_conn_get(conn);
                return;
        }
 

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index c245743..d8c6666 100644 (file)
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -3063,6 +3063,7 @@ static void pairing_complete(struct pending_cmd *cmd, u8 status)
        conn->disconn_cfm_cb = NULL;
 
        hci_conn_drop(conn);
+       hci_conn_put(conn);
 
        mgmt_pending_remove(cmd);
 }
@@ -3212,7 +3213,7 @@ static int pair_device(struct sock *sk, struct hci_dev *hdev, void *data,
        }
 
        conn->io_capability = cp->io_cap;
-       cmd->user_data = conn;
+       cmd->user_data = hci_conn_get(conn);
 
        if ((conn->state == BT_CONNECTED || conn->state == BT_CONFIG) &&
            hci_conn_security(conn, sec_level, auth_type, true))
@@ -4914,6 +4915,7 @@ static void get_conn_info_complete(struct pending_cmd *cmd, void *data)
                     match->mgmt_status, &rp, sizeof(rp));
 
        hci_conn_drop(conn);
+       hci_conn_put(conn);
 
        mgmt_pending_remove(cmd);
 }
@@ -5070,7 +5072,7 @@ static int get_conn_info(struct sock *sk, struct hci_dev *hdev, void *data,
                }
 
                hci_conn_hold(conn);
-               cmd->user_data = conn;
+               cmd->user_data = hci_conn_get(conn);
 
                conn->conn_info_timestamp = jiffies;
        } else {
@@ -5134,8 +5136,10 @@ send_rsp:
        cmd_complete(cmd->sk, cmd->index, cmd->opcode, mgmt_status(status),
                     &rp, sizeof(rp));
        mgmt_pending_remove(cmd);
-       if (conn)
+       if (conn) {
                hci_conn_drop(conn);
+               hci_conn_put(conn);
+       }
 
 unlock:
        hci_dev_unlock(hdev);
@@ -5198,7 +5202,7 @@ static int get_clock_info(struct sock *sk, struct hci_dev *hdev, void *data,
 
        if (conn) {
                hci_conn_hold(conn);
-               cmd->user_data = conn;
+               cmd->user_data = hci_conn_get(conn);
 
                hci_cp.handle = cpu_to_le16(conn->handle);
                hci_cp.which = 0x01; /* Piconet clock */