linux-kernel - [PATCH 3.8 106/121] Bluetooth: Fix triggering BR/EDR L2CAP Connect too early

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Message-Id: <1403021899-16708-79-git-send-email-kamal@canonical.com>
Date:	Tue, 17 Jun 2014 09:18:04 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Johan Hedberg <johan.hedberg@...el.com>,
	Marcel Holtmann <marcel@...tmann.org>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.8 106/121] Bluetooth: Fix triggering BR/EDR L2CAP Connect too early

3.8.13.24 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johan Hedberg <johan.hedberg@...el.com>

commit 9eb1fbfa0a737fd4d3a6d12d71c5ea9af622b887 upstream.

Commit 1c2e004183178 introduced an event handler for the encryption key
refresh complete event with the intent of fixing some LE/SMP cases.
However, this event is shared with BR/EDR and there we actually want to
act only on the auth_complete event (which comes after the key refresh).

If we do not do this we may trigger an L2CAP Connect Request too early
and cause the remote side to return a security block error.

Signed-off-by: Johan Hedberg <johan.hedberg@...el.com>
Signed-off-by: Marcel Holtmann <marcel@...tmann.org>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 net/bluetooth/hci_event.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index b719a83..ba6f399 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -3406,6 +3406,12 @@ static void hci_key_refresh_complete_evt(struct hci_dev *hdev,
 	if (!conn)
 		goto unlock;
 
+	/* For BR/EDR the necessary steps are taken through the
+	 * auth_complete event.
+	 */
+	if (conn->type != LE_LINK)
+		goto unlock;
+
 	if (!ev->status)
 		conn->sec_level = conn->pending_sec_level;
 
-- 
1.9.1

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