Patch "Bluetooth: Delay check for conn->smp in smp_conn_security()" has been added to the 4.2-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    Bluetooth: Delay check for conn->smp in smp_conn_security()

to the 4.2-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-delay-check-for-conn-smp-in-smp_conn_security.patch
and it can be found in the queue-4.2 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From d8949aad3eab5d396f4fefcd581773bf07b9a79e Mon Sep 17 00:00:00 2001
From: Johan Hedberg <johan.hedberg@intel.com>
Date: Fri, 4 Sep 2015 12:22:46 +0300
Subject: Bluetooth: Delay check for conn->smp in smp_conn_security()

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

commit d8949aad3eab5d396f4fefcd581773bf07b9a79e upstream.

There are several actions that smp_conn_security() might make that do
not require a valid SMP context (conn->smp pointer). One of these
actions is to encrypt the link with an existing LTK. If the SMP
context wasn't initialized properly we should still allow the
independent actions to be done, i.e. the check for the context should
only be done at the last possible moment.

Reported-by: Chuck Ebbert <cebbert.lkml@gmail.com>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 net/bluetooth/smp.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -2311,12 +2311,6 @@ int smp_conn_security(struct hci_conn *h
 	if (!conn)
 		return 1;
 
-	chan = conn->smp;
-	if (!chan) {
-		BT_ERR("SMP security requested but not available");
-		return 1;
-	}
-
 	if (!hci_dev_test_flag(hcon->hdev, HCI_LE_ENABLED))
 		return 1;
 
@@ -2330,6 +2324,12 @@ int smp_conn_security(struct hci_conn *h
 		if (smp_ltk_encrypt(conn, hcon->pending_sec_level))
 			return 0;
 
+	chan = conn->smp;
+	if (!chan) {
+		BT_ERR("SMP security requested but not available");
+		return 1;
+	}
+
 	l2cap_chan_lock(chan);
 
 	/* If SMP is already in progress ignore this request */


Patches currently in stable-queue which might be from johan.hedberg@intel.com are

queue-4.2/bluetooth-delay-check-for-conn-smp-in-smp_conn_security.patch