This is a note to let you know that I've just added the patch titled
Bluetooth: MGMT: Fix not generating command complete for MGMT_OP_DISCONNECT
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
bluetooth-mgmt-fix-not-generating-command-complete-f.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 70ae1cd775f9cf7724777bd03e25218bdce873d3
Author: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
Date: Mon Aug 26 16:14:04 2024 -0400
Bluetooth: MGMT: Fix not generating command complete for MGMT_OP_DISCONNECT
[ Upstream commit 227a0cdf4a028a73dc256d0f5144b4808d718893 ]
MGMT_OP_DISCONNECT can be called while mgmt_device_connected has not
been called yet, which will cause the connection procedure to be
aborted, so mgmt_device_disconnected shall still respond with command
complete to MGMT_OP_DISCONNECT and just not emit
MGMT_EV_DEVICE_DISCONNECTED since MGMT_EV_DEVICE_CONNECTED was never
sent.
To fix this MGMT_OP_DISCONNECT is changed to work similarly to other
command which do use hci_cmd_sync_queue and then use hci_conn_abort to
disconnect and returns the result, in order for hci_conn_abort to be
used from hci_cmd_sync context it now uses hci_cmd_sync_run_once.
Link: https://github.com/bluez/bluez/issues/932
Fixes: 12d4a3b2ccb3 ("Bluetooth: Move check for MGMT_CONNECTED flag into mgmt.c")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index efa0881a90e1..d8a01eb016ad 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -2877,5 +2877,9 @@ int hci_abort_conn(struct hci_conn *conn, u8 reason)
return 0;
}
- return hci_cmd_sync_queue_once(hdev, abort_conn_sync, conn, NULL);
+ /* Run immediately if on cmd_sync_work since this may be called
+ * as a result to MGMT_OP_DISCONNECT/MGMT_OP_UNPAIR which does
+ * already queue its callback on cmd_sync_work.
+ */
+ return hci_cmd_sync_run_once(hdev, abort_conn_sync, conn, NULL);
}
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index bad365f3d7bf..4ae9029b5785 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -2918,7 +2918,12 @@ static int unpair_device_sync(struct hci_dev *hdev, void *data)
if (!conn)
return 0;
- return hci_abort_conn_sync(hdev, conn, HCI_ERROR_REMOTE_USER_TERM);
+ /* Disregard any possible error since the likes of hci_abort_conn_sync
+ * will clean up the connection no matter the error.
+ */
+ hci_abort_conn(conn, HCI_ERROR_REMOTE_USER_TERM);
+
+ return 0;
}
static int unpair_device(struct sock *sk, struct hci_dev *hdev, void *data,
@@ -3050,13 +3055,44 @@ static int unpair_device(struct sock *sk, struct hci_dev *hdev, void *data,
return err;
}
+static void disconnect_complete(struct hci_dev *hdev, void *data, int err)
+{
+ struct mgmt_pending_cmd *cmd = data;
+
+ cmd->cmd_complete(cmd, mgmt_status(err));
+ mgmt_pending_free(cmd);
+}
+
+static int disconnect_sync(struct hci_dev *hdev, void *data)
+{
+ struct mgmt_pending_cmd *cmd = data;
+ struct mgmt_cp_disconnect *cp = cmd->param;
+ struct hci_conn *conn;
+
+ if (cp->addr.type == BDADDR_BREDR)
+ conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK,
+ &cp->addr.bdaddr);
+ else
+ conn = hci_conn_hash_lookup_le(hdev, &cp->addr.bdaddr,
+ le_addr_type(cp->addr.type));
+
+ if (!conn)
+ return -ENOTCONN;
+
+ /* Disregard any possible error since the likes of hci_abort_conn_sync
+ * will clean up the connection no matter the error.
+ */
+ hci_abort_conn(conn, HCI_ERROR_REMOTE_USER_TERM);
+
+ return 0;
+}
+
static int disconnect(struct sock *sk, struct hci_dev *hdev, void *data,
u16 len)
{
struct mgmt_cp_disconnect *cp = data;
struct mgmt_rp_disconnect rp;
struct mgmt_pending_cmd *cmd;
- struct hci_conn *conn;
int err;
bt_dev_dbg(hdev, "sock %p", sk);
@@ -3079,27 +3115,7 @@ static int disconnect(struct sock *sk, struct hci_dev *hdev, void *data,
goto failed;
}
- if (pending_find(MGMT_OP_DISCONNECT, hdev)) {
- err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_DISCONNECT,
- MGMT_STATUS_BUSY, &rp, sizeof(rp));
- goto failed;
- }
-
- if (cp->addr.type == BDADDR_BREDR)
- conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK,
- &cp->addr.bdaddr);
- else
- conn = hci_conn_hash_lookup_le(hdev, &cp->addr.bdaddr,
- le_addr_type(cp->addr.type));
-
- if (!conn || conn->state == BT_OPEN || conn->state == BT_CLOSED) {
- err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_DISCONNECT,
- MGMT_STATUS_NOT_CONNECTED, &rp,
- sizeof(rp));
- goto failed;
- }
-
- cmd = mgmt_pending_add(sk, MGMT_OP_DISCONNECT, hdev, data, len);
+ cmd = mgmt_pending_new(sk, MGMT_OP_DISCONNECT, hdev, data, len);
if (!cmd) {
err = -ENOMEM;
goto failed;
@@ -3107,9 +3123,10 @@ static int disconnect(struct sock *sk, struct hci_dev *hdev, void *data,
cmd->cmd_complete = generic_cmd_complete;
- err = hci_disconnect(conn, HCI_ERROR_REMOTE_USER_TERM);
+ err = hci_cmd_sync_queue(hdev, disconnect_sync, cmd,
+ disconnect_complete);
if (err < 0)
- mgmt_pending_remove(cmd);
+ mgmt_pending_free(cmd);
failed:
hci_dev_unlock(hdev);
@@ -9627,18 +9644,6 @@ void mgmt_device_connected(struct hci_dev *hdev, struct hci_conn *conn,
mgmt_event_skb(skb, NULL);
}
-static void disconnect_rsp(struct mgmt_pending_cmd *cmd, void *data)
-{
- struct sock **sk = data;
-
- cmd->cmd_complete(cmd, 0);
-
- *sk = cmd->sk;
- sock_hold(*sk);
-
- mgmt_pending_remove(cmd);
-}
-
static void unpair_device_rsp(struct mgmt_pending_cmd *cmd, void *data)
{
struct hci_dev *hdev = data;
@@ -9679,8 +9684,6 @@ void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
if (link_type != ACL_LINK && link_type != LE_LINK)
return;
- mgmt_pending_foreach(MGMT_OP_DISCONNECT, hdev, disconnect_rsp, &sk);
-
bacpy(&ev.addr.bdaddr, bdaddr);
ev.addr.type = link_to_bdaddr(link_type, addr_type);
ev.reason = reason;
@@ -9693,9 +9696,6 @@ void mgmt_device_disconnected(struct hci_dev *hdev, bdaddr_t *bdaddr,
if (sk)
sock_put(sk);
-
- mgmt_pending_foreach(MGMT_OP_UNPAIR_DEVICE, hdev, unpair_device_rsp,
- hdev);
}
void mgmt_disconnect_failed(struct hci_dev *hdev, bdaddr_t *bdaddr,
