Patch "can: af_can: canfd_rcv(): replace WARN_ONCE by pr_warn_once" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

can: af_can: canfd_rcv(): replace WARN_ONCE by pr_warn_once

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
can-af_can-canfd_rcv-replace-warn_once-by-pr_warn_once.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Marc Kleine-Budde <[email protected]>
Date: Tue, 16 Jan 2018 19:30:14 +0100
Subject: can: af_can: canfd_rcv(): replace WARN_ONCE by pr_warn_once

From: Marc Kleine-Budde <[email protected]>

commit d4689846881d160a4d12a514e991a740bcb5d65a upstream.

If an invalid CANFD frame is received, from a driver or from a tun interface, a Kernel warning is generated.

This patch replaces the WARN_ONCE by a simple pr_warn_once, so that a kernel, bootet with panic_on_warn, does not panic. A printk seems to be more appropriate here.

---
 net/can/af_can.c |   11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

@@ -745,13 +745,12 @@ static int canfd_rcv(struct sk_buff *skb
 	if (unlikely(!net_eq(dev_net(dev), &init_net)))
 		goto drop;
 
-	if (WARN_ONCE(dev->type != ARPHRD_CAN ||
-		      skb->len != CANFD_MTU ||
-		      cfd->len > CANFD_MAX_DLEN,
-		      "PF_CAN: dropped non conform CAN FD skbuf: "
-		      "dev type %d, len %d, datalen %d\n",
-		      dev->type, skb->len, cfd->len))
+	if (unlikely(dev->type != ARPHRD_CAN || skb->len != CANFD_MTU ||
+		     cfd->len > CANFD_MAX_DLEN)) {
+		pr_warn_once("PF_CAN: dropped non conform CAN FD skbuf: dev type %d, len %d, datalen %d\n",
+			     dev->type, skb->len, cfd->len);
 		goto drop;
+	}
 
 	can_receive(skb, dev);
 	return NET_RX_SUCCESS;

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/can-af_can-canfd_rcv-replace-warn_once-by-pr_warn_once.patch queue-4.4/can-af_can-can_rcv-replace-warn_once-by-pr_warn_once.patch