can: j1939: j1939_tp_cmd_recv(): ignore abort message in the BAM tran…

…sport 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: 9d71dd0 ("can: add support of SAE J1939 protocol") Link: https://lore.kernel.org/all/[email protected] Cc: [email protected] Signed-off-by: Zhang Changzhong <[email protected]> Acked-by: Oleksij Rempel <[email protected]> Signed-off-by: Marc Kleine-Budde <[email protected]>
sm00th · Nov 6, 2021 · c0f49d9 · c0f49d9
1 parent 70bf363
commit c0f49d9
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/net/can/j1939/transport.c b/net/can/j1939/transport.c
@@ -2085,6 +2085,12 @@ static void j1939_tp_cmd_recv(struct j1939_priv *priv, struct sk_buff *skb)
 		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);