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

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>
Cc: stable@vger.kernel.org

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c
index 04680ead9275..fede8ca7147c 100644
--- 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;