[PATCH 4.9 055/212] Bluetooth: Prevent out-of-bounds read in hci_inquiry_result_evt()

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 @@ -2094,7 +2094,7 @@ 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))