FAILED: patch "[PATCH] can: j1939: j1939_tp_cmd_recv(): check the dst address of" failed to apply to 5.10-stable tree

The patch below does not apply to the 5.10-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 164051a6ab5445bd97f719f50b16db8b32174269 Mon Sep 17 00:00:00 2001
From: Zhang Changzhong <[email protected]>
Date: Thu, 28 Oct 2021 22:38:27 +0800
Subject: [PATCH] can: j1939: j1939_tp_cmd_recv(): check the dst address of
TP.CM_BAM

The TP.CM_BAM message must be sent to the global address [1], so add a check to drop TP.CM_BAM sent to a non-global address.

Without this patch, the receiver will treat the following packets as normal RTS/CTS transport:
18EC0102#20090002FF002301
18EB0102#0100000000000000
18EB0102#020000FFFFFFFFFF

[1] SAE-J1939-82 2015 A.3.3 Row 1.

index 05eb3d059e17..a271688780a2 100644
@@ -2023,6 +2023,11 @@ static void j1939_tp_cmd_recv(struct j1939_priv *priv, struct sk_buff *skb)
 		extd = J1939_ETP;
 		fallthrough;
 	case J1939_TP_CMD_BAM:
+		if (cmd == J1939_TP_CMD_BAM && !j1939_cb_is_broadcast(skcb)) {
+			netdev_err_once(priv->ndev, "%s: BAM to unicast (%02x), ignoring!\n",
+					__func__, skcb->addr.sa);
+			return;
+		}
 		fallthrough;
 	case J1939_TP_CMD_RTS:
 		if (skcb->addr.type != extd)