Bluetooth: Ignore H5 non-link packets in non-active state

commit 48439d501e3d9e8634bdc0c418e066870039599d upstream.

When detecting a non-link packet, h5_reset_rx() frees the Rx skb.
Not returning after that will cause the upcoming h5_rx_payload()
call to dereference a now NULL Rx skb and trigger a kernel oops.

Signed-off-by: Loic Poulain <loic.poulain@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c
index b6154d5..db0be2f 100644 (file)
--- a/drivers/bluetooth/hci_h5.c
+++ b/drivers/bluetooth/hci_h5.c
@@ -406,6 +406,7 @@ static int h5_rx_3wire_hdr(struct hci_uart *hu, unsigned char c)
            H5_HDR_PKT_TYPE(hdr) != HCI_3WIRE_LINK_PKT) {
                BT_ERR("Non-link packet received in non-active state");
                h5_reset_rx(h5);
+               return 0;
        }
 
        h5->rx_func = h5_rx_payload;