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

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