This is a note to let you know that I've just added the patch titled
can: kvaser_usb: Fix comparison bug in kvaser_usb_read_bulk_callback()
to the 4.9-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-kvaser_usb-fix-comparison-bug-in-kvaser_usb_read_bulk_callback.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e84f44eb5523401faeb9cc1c97895b68e3cfb78d Mon Sep 17 00:00:00 2001
From: Jimmy Assarsson <jimmyassarsson@xxxxxxxxx>
Date: Tue, 21 Nov 2017 08:22:27 +0100
Subject: can: kvaser_usb: Fix comparison bug in kvaser_usb_read_bulk_callback()
From: Jimmy Assarsson <jimmyassarsson@xxxxxxxxx>
commit e84f44eb5523401faeb9cc1c97895b68e3cfb78d upstream.
The conditon in the while-loop becomes true when actual_length is less than
2 (MSG_HEADER_LEN). In best case we end up with a former, already
dispatched msg, that got msg->len greater than actual_length. This will
result in a "Format error" error printout.
Problem seen when unplugging a Kvaser USB device connected to a vbox guest.
warning: comparison between signed and unsigned integer expressions
[-Wsign-compare]
Signed-off-by: Jimmy Assarsson <jimmyassarsson@xxxxxxxxx>
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/can/usb/kvaser_usb.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/can/usb/kvaser_usb.c
+++ b/drivers/net/can/usb/kvaser_usb.c
@@ -1334,7 +1334,7 @@ static void kvaser_usb_read_bulk_callbac
goto resubmit_urb;
}
- while (pos <= urb->actual_length - MSG_HEADER_LEN) {
+ while (pos <= (int)(urb->actual_length - MSG_HEADER_LEN)) {
msg = urb->transfer_buffer + pos;
/* The Kvaser firmware can only read and write messages that
Patches currently in stable-queue which might be from jimmyassarsson@xxxxxxxxx are
queue-4.9/can-kvaser_usb-ratelimit-errors-if-incomplete-messages-are-received.patch
queue-4.9/can-kvaser_usb-free-buf-in-error-paths.patch
queue-4.9/can-kvaser_usb-fix-comparison-bug-in-kvaser_usb_read_bulk_callback.patch