From: Zhang Changzhong zhangchangzhong@huawei.com
commit c0f49d98006f2db3333b917caac65bce2af9865c upstream.
This patch prevents BAM transport from being closed by receiving abort message, as specified in SAE-J1939-82 2015 (A.3.3 Row 4).
Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol") Link: https://lore.kernel.org/all/1635431907-15617-2-git-send-email-zhangchangzhon... Cc: stable@vger.kernel.org Signed-off-by: Zhang Changzhong zhangchangzhong@huawei.com Acked-by: Oleksij Rempel o.rempel@pengutronix.de Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/can/j1939/transport.c | 6 ++++++ 1 file changed, 6 insertions(+)
--- a/net/can/j1939/transport.c +++ b/net/can/j1939/transport.c @@ -2085,6 +2085,12 @@ static void j1939_tp_cmd_recv(struct j19 break;
case J1939_ETP_CMD_ABORT: /* && J1939_TP_CMD_ABORT */ + if (j1939_cb_is_broadcast(skcb)) { + netdev_err_once(priv->ndev, "%s: abort to broadcast (%02x), ignoring!\n", + __func__, skcb->addr.sa); + return; + } + if (j1939_tp_im_transmitter(skcb)) j1939_xtp_rx_abort(priv, skb, true);