From: Marcel Holtmann <marcel@holtmann.org>
Date: Thu, 8 Oct 2015 01:14:28 +0000 (+0200)
Subject: Bluetooth: Enforce packet types in hci_recv_frame driver function
X-Git-Tag: v4.13~4255^2~173^2~8
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=fe806dceded462f7930f8ac4a41c5d19819e70b7;hp=943cc592195ea458058c121d9c4d7481d0f28be1;p=mirror_ubuntu-bionic-kernel.git

Bluetooth: Enforce packet types in hci_recv_frame driver function

When calling the hci_recv_frame driver function check for valid packet
types that the core should process. This should catch issues with
drivers trying to feed vendor packet types through this interface.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
---

diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 43a1f2d8ffd3..b2095ca8472e 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3538,6 +3538,13 @@ int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
 		return -ENXIO;
 	}
 
+	if (bt_cb(skb)->pkt_type != HCI_EVENT_PKT &&
+	    bt_cb(skb)->pkt_type != HCI_ACLDATA_PKT &&
+	    bt_cb(skb)->pkt_type != HCI_SCODATA_PKT) {
+		kfree_skb(skb);
+		return -EINVAL;
+	}
+
 	/* Incoming skb */
 	bt_cb(skb)->incoming = 1;