From: Soenke Huster <soenke.huster@eknoes.de>
Date: Sun, 23 Jan 2022 05:57:09 +0000 (+0100)
Subject: Bluetooth: msft: fix null pointer deref on msft_monitor_device_evt
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=5201d23cc8e57531e0b17e41c0ae10405ba6abd3;p=linux.git

Bluetooth: msft: fix null pointer deref on msft_monitor_device_evt

msft_find_handle_data returns NULL if it can't find the handle.
Therefore, handle_data must be checked, otherwise a null pointer
is dereferenced.

Signed-off-by: Soenke Huster <soenke.huster@eknoes.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
---

diff --git a/net/bluetooth/msft.c b/net/bluetooth/msft.c
index 4845408558636..9a3d77d3ca868 100644
--- a/net/bluetooth/msft.c
+++ b/net/bluetooth/msft.c
@@ -704,6 +704,8 @@ static void msft_monitor_device_evt(struct hci_dev *hdev, struct sk_buff *skb)
 		   ev->monitor_state, &ev->bdaddr);
 
 	handle_data = msft_find_handle_data(hdev, ev->monitor_handle, false);
+	if (!handle_data)
+		return;
 
 	switch (ev->addr_type) {
 	case ADDR_LE_DEV_PUBLIC: