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Bluetooth: Fix NULL pointer dereference in smp_conn_security 

The l2cap_conn->smp pointer may be NULL for various valid reasons where SMP has
failed to initialize properly. One such scenario is when crypto support is
missing, another when the adapter has been powered on through a legacy method.
The smp_conn_security() function should have the appropriate check for this
situation to avoid NULL pointer dereferences.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Cc: stable@vger.kernel.org # 4.0+
This commit is contained in:
Johan Hedberg 2015-07-20 20:31:25 +03:00 committed by Marcel Holtmann
parent c5dfd654d0
commit 25ba265390
1 changed files with 4 additions and 0 deletions
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4
net/bluetooth/smp.c
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@ -2312,6 +2312,10 @@ int smp_conn_security(struct hci_conn *hcon, __u8 sec_level)
return 1; return 1;
chan = conn->smp; 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)) if (!hci_dev_test_flag(hcon->hdev, HCI_LE_ENABLED))
return 1; return 1;