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authorJohan Hedberg <johan.hedberg@intel.com>2015-09-04 12:22:46 +0300
committerMarcel Holtmann <marcel@holtmann.org>2015-09-17 12:28:27 +0200
commitd8949aad3eab5d396f4fefcd581773bf07b9a79e (patch)
tree3f3f0b3c775621eef856097a6c5ef7847452f502 /net
parent20471ed4d403a5f4de6aa0c10cd1e446f7f2b3c7 (diff)
Bluetooth: Delay check for conn->smp in smp_conn_security()
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> Cc: stable@vger.kernel.org # 4.0+
Diffstat (limited to 'net')
-rw-r--r--net/bluetooth/smp.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c
index ad82324f710f..0510a577a7b5 100644
--- a/net/bluetooth/smp.c
+++ b/net/bluetooth/smp.c
@@ -2311,12 +2311,6 @@ int smp_conn_security(struct hci_conn *hcon, __u8 sec_level)
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 *hcon, __u8 sec_level)
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 */