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authorJohan Hedberg <johan.hedberg@intel.com>2015-07-20 20:31:25 +0300
committerMarcel Holtmann <marcel@holtmann.org>2015-07-23 16:41:24 +0200
commit25ba265390c09b0a2b2f3fd9ba82e37248b7a371 (patch)
treec8b2d2203008ca2a55d261b0e9bdcb645a38f66a /net/bluetooth
parentc5dfd654d0ec0a28fe81e7bd4d4fd984a9855e09 (diff)
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+
Diffstat (limited to 'net/bluetooth')
-rw-r--r--net/bluetooth/smp.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index 3d0f7d2a0616..ad82324f710f 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -2312,6 +2312,10 @@ int smp_conn_security(struct hci_conn *hcon, __u8 sec_level)
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;