[PATCH 5.7 16/79] Bluetooth: Prevent out-of-bounds read in hci_inquiry_result_evt()

Greg Kroah-Hartman
2020-08-10T15:22:39Z

From: Peilin Ye <yepeilin.cs@gmail.com>

commit 75bbd2ea50ba1c5d9da878a17e92eac02fe0fd3a upstream.

Check `num_rsp` before using it as for-loop counter.

Cc: stable@vger.kernel.org
Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
net/bluetooth/hci_event.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -2487,7 +2487,7 @@ static void hci_inquiry_result_evt(struc

BT_DBG("%s num_rsp %d", hdev->name, num_rsp);

- if (!num_rsp)
+ if (!num_rsp || skb->len < num_rsp * sizeof(*info) + 1)
return;

if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))