[PATCH v2] Bluetooth: msft: fix null pointer deref on msft_monitor_device_evt

From: Soenke Huster
Date: Sun Jan 23 2022 - 00:57:45 EST


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@xxxxxxxxx>
---
v2: Remove empty line

net/bluetooth/msft.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/net/bluetooth/msft.c b/net/bluetooth/msft.c
index 484540855863..9a3d77d3ca86 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:
--
2.34.1