This is a note to let you know that I've just added the patch titled
can: gs_usb: gs_can_start_xmit(): zero-initialize hf->{flags,reserved}
to the 5.4-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-gs_usb-gs_can_start_xmit-zero-initialize-hf-flags-reserved.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 89d58aebe14a365c25ba6645414afdbf4e41cea4 Mon Sep 17 00:00:00 2001
From: Brian Silverman <brian.silverman@xxxxxxxxxxxxxxxxx>
Date: Wed, 5 Jan 2022 16:29:50 -0800
Subject: can: gs_usb: gs_can_start_xmit(): zero-initialize hf->{flags,reserved}
From: Brian Silverman <brian.silverman@xxxxxxxxxxxxxxxxx>
commit 89d58aebe14a365c25ba6645414afdbf4e41cea4 upstream.
No information is deliberately sent in hf->flags in host -> device
communications, but the open-source candleLight firmware echoes it
back, which can result in the GS_CAN_FLAG_OVERFLOW flag being set and
generating spurious ERRORFRAMEs.
While there also initialize the reserved member with 0.
Fixes: d08e973a77d1 ("can: gs_usb: Added support for the GS_USB CAN devices")
Link: https://lore.kernel.org/all/20220106002952.25883-1-brian.silverman@xxxxxxxxxxxxxxxxx
Link: https://github.com/candle-usb/candleLight_fw/issues/87
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Brian Silverman <brian.silverman@xxxxxxxxxxxxxxxxx>
[mkl: initialize the reserved member, too]
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/can/usb/gs_usb.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/net/can/usb/gs_usb.c
+++ b/drivers/net/can/usb/gs_usb.c
@@ -507,6 +507,8 @@ static netdev_tx_t gs_can_start_xmit(str
hf->echo_id = idx;
hf->channel = dev->channel;
+ hf->flags = 0;
+ hf->reserved = 0;
cf = (struct can_frame *)skb->data;
Patches currently in stable-queue which might be from brian.silverman@xxxxxxxxxxxxxxxxx are
queue-5.4/can-gs_usb-gs_can_start_xmit-zero-initialize-hf-flags-reserved.patch
