| Message ID | 1404991081-13133-1-git-send-email-luis.henriques@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index fedc5399d465..211fffb5dca8 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -2319,8 +2319,13 @@ static int user_pairing_resp(struct sock *sk, struct hci_dev *hdev, } if (addr->type == BDADDR_LE_PUBLIC || addr->type == BDADDR_LE_RANDOM) { - /* Continue with pairing via SMP */ + /* Continue with pairing via SMP. The hdev lock must be + * released as SMP may try to recquire it for crypto + * purposes. + */ + hci_dev_unlock(hdev); err = smp_user_confirm_reply(conn, mgmt_op, passkey); + hci_dev_lock(hdev); if (!err) err = cmd_complete(sk, hdev->id, mgmt_op,
This is a note to let you know that I have just added a patch titled Bluetooth: Fix locking of hdev when calling into SMP code to the linux-3.11.y-queue branch of the 3.11.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.11.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.11.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Luis ------ From 810a98b102196fb2c8638657b9a874dc4fe9163b Mon Sep 17 00:00:00 2001 From: Johan Hedberg <johan.hedberg@intel.com> Date: Fri, 13 Jun 2014 10:22:28 +0300 Subject: Bluetooth: Fix locking of hdev when calling into SMP code commit c73f94b8c093a615ce80eabbde0ac6eb9abfe31a upstream. The SMP code expects hdev to be unlocked since e.g. crypto functions will try to (re)lock it. Therefore, we need to release the lock before calling into smp.c from mgmt.c. Without this we risk a deadlock whenever the smp_user_confirm_reply() function is called. Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> Tested-by: Lukasz Rymanowski <lukasz.rymanowski@tieto.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- net/bluetooth/mgmt.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) -- 1.9.1