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Bluetooth: L2CAP: Fix not responding with L2CAP_CR_LE_ENCRYPTION

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Depending on the security set the response to L2CAP_LE_CONN_REQ shall be
just L2CAP_CR_LE_ENCRYPTION if only encryption when BT_SECURITY_MEDIUM
is selected since that means security mode 2 which doesn't require
authentication which is something that is covered in the qualification
test L2CAP/LE/CFC/BV-25-C.

Link: https://github.com/bluez/bluez/issues/1270
Fixes: 27e2d4c8d2 ("Bluetooth: Add basic LE L2CAP connect request receiving support")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Luiz Augusto von Dentz 2025-05-28 14:53:11 -04:00
parent 0fb410c914
commit 03dba9cea7
1 changed files with 2 additions and 1 deletions
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3
net/bluetooth/l2cap_core.c
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@ -4870,7 +4870,8 @@ static int l2cap_le_connect_req(struct l2cap_conn *conn,
if (!smp_sufficient_security(conn->hcon, pchan->sec_level,
SMP_ALLOW_STK)) {
result = L2CAP_CR_LE_AUTHENTICATION;
result = pchan->sec_level == BT_SECURITY_MEDIUM ?
L2CAP_CR_LE_ENCRYPTION : L2CAP_CR_LE_AUTHENTICATION;
chan = NULL;
goto response_unlock;
}