diff options
Diffstat (limited to 'Bluetooth-Check-key-sizes-only-when-Secure-Simple-Pa.patch')
| -rw-r--r-- | Bluetooth-Check-key-sizes-only-when-Secure-Simple-Pa.patch | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/Bluetooth-Check-key-sizes-only-when-Secure-Simple-Pa.patch b/Bluetooth-Check-key-sizes-only-when-Secure-Simple-Pa.patch new file mode 100644 index 000000000..ee7a5309b --- /dev/null +++ b/Bluetooth-Check-key-sizes-only-when-Secure-Simple-Pa.patch @@ -0,0 +1,44 @@ +From 7451bbd2c5c1c6512689855532ad49f26ba00cd6 Mon Sep 17 00:00:00 2001 +From: Marcel Holtmann <marcel@holtmann.org> +Date: Wed, 22 May 2019 09:05:40 +0200 +Subject: [PATCH] Bluetooth: Check key sizes only when Secure Simple Pairing is + enabled + +The encryption is only mandatory to be enforced when both sides are using +Secure Simple Pairing and this means the key size check makes only sense +in that case. + +On legacy Bluetooth 2.0 and earlier devices like mice the encryption was +optional and thus causing an issue if the key size check is not bound to +using Secure Simple Pairing. + +Fixes: d5bb334a8e17 ("Bluetooth: Align minimum encryption key size for LE and BR/EDR connections") +Signed-off-by: Marcel Holtmann <marcel@holtmann.org> +Cc: stable@vger.kernel.org +--- + net/bluetooth/hci_conn.c | 9 +++++++-- + 1 file changed, 7 insertions(+), 2 deletions(-) + +diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c +index 3cf0764d5793..7516cdde3373 100644 +--- a/net/bluetooth/hci_conn.c ++++ b/net/bluetooth/hci_conn.c +@@ -1272,8 +1272,13 @@ int hci_conn_check_link_mode(struct hci_conn *conn) + return 0; + } + +- if (hci_conn_ssp_enabled(conn) && +- !test_bit(HCI_CONN_ENCRYPT, &conn->flags)) ++ /* If Secure Simple Pairing is not enabled, then legacy connection ++ * setup is used and no encryption or key sizes can be enforced. ++ */ ++ if (!hci_conn_ssp_enabled(conn)) ++ return 1; ++ ++ if (!test_bit(HCI_CONN_ENCRYPT, &conn->flags)) + return 0; + + /* The minimum encryption key size needs to be enforced by the +-- +2.20.1 + |