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@xxxxxxxxxxxxxxx> know about it. >From d8949aad3eab5d396f4fefcd581773bf07b9a79e Mon Sep 17 00:00:00 2001 From: Johan Hedberg <johan.hedberg@xxxxxxxxx> 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@xxxxxxxxx> 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@xxxxxxxxx> Signed-off-by: Johan Hedberg <johan.hedberg@xxxxxxxxx> Signed-off-by: Marcel Holtmann <marcel@xxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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@xxxxxxxxx are queue-4.2/bluetooth-delay-check-for-conn-smp-in-smp_conn_security.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html