linux-kernel - [PATCH 6.0 036/862] can: kvaser_usb_leaf: Fix CAN state after restart

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20221019083251.610456071@linuxfoundation.org>
Date:   Wed, 19 Oct 2022 10:22:03 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jimmy Assarsson <extja@...ser.com>,
        Anssi Hannula <anssi.hannula@...wise.fi>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH 6.0 036/862] can: kvaser_usb_leaf: Fix CAN state after restart

From: Anssi Hannula <anssi.hannula@...wise.fi>

commit 0be1a655fe68c8e6dcadbcbddb69cf2fb29881f5 upstream.

can_restart() expects CMD_START_CHIP to set the error state to
ERROR_ACTIVE as it calls netif_carrier_on() immediately afterwards.

Otherwise the user may immediately trigger restart again and hit a
BUG_ON() in can_restart().

Fix kvaser_usb_leaf set_mode(CMD_START_CHIP) to set the expected state.

Cc: stable@...r.kernel.org
Fixes: 080f40a6fa28 ("can: kvaser_usb: Add support for Kvaser CAN/USB devices")
Tested-by: Jimmy Assarsson <extja@...ser.com>
Signed-off-by: Anssi Hannula <anssi.hannula@...wise.fi>
Signed-off-by: Jimmy Assarsson <extja@...ser.com>
Link: https://lore.kernel.org/all/20221010150829.199676-5-extja@kvaser.com
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
+++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
@@ -1431,6 +1431,8 @@ static int kvaser_usb_leaf_set_mode(stru
 		err = kvaser_usb_leaf_simple_cmd_async(priv, CMD_START_CHIP);
 		if (err)
 			return err;
+
+		priv->can.state = CAN_STATE_ERROR_ACTIVE;
 		break;
 	default:
 		return -EOPNOTSUPP;