linux-kernel - [PATCH 5.19 031/155] Bluetooth: hci_event: Fix checking conn for le_conn_complete

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Message-Id: <20220906132830.736065571@linuxfoundation.org>
Date:   Tue,  6 Sep 2022 15:29:39 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Archie Pusaka <apusaka@...omium.org>,
        Sonny Sasaka <sonnysasaka@...omium.org>,
        Luiz Augusto von Dentz <luiz.von.dentz@...el.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.19 031/155] Bluetooth: hci_event: Fix checking conn for le_conn_complete_evt

From: Archie Pusaka <apusaka@...omium.org>

[ Upstream commit f48735a9aaf8258f39918e13adf464ccd7dce33b ]

To prevent multiple conn complete events, we shouldn't look up the
conn with hci_lookup_le_connect, since it requires the state to be
BT_CONNECT. By the time the duplicate event is processed, the state
might have changed, so we end up processing the new event anyway.

Change the lookup function to hci_conn_hash_lookup_ba.

Fixes: d5ebaa7c5f6f6 ("Bluetooth: hci_event: Ignore multiple conn complete events")
Signed-off-by: Archie Pusaka <apusaka@...omium.org>
Reviewed-by: Sonny Sasaka <sonnysasaka@...omium.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 net/bluetooth/hci_event.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index 67c61f5240596..2c320a8fe70d7 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -5568,7 +5568,7 @@ static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
 	 */
 	hci_dev_clear_flag(hdev, HCI_LE_ADV);
 
-	conn = hci_lookup_le_connect(hdev);
+	conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, bdaddr);
 	if (!conn) {
 		/* In case of error status and there is no connection pending
 		 * just unlock as there is nothing to cleanup.
-- 
2.35.1