From: Jimmy Assarsson <extja@kvaser.com>
To: linux-can@vger.kernel.org, Marc Kleine-Budde <mkl@pengutronix.de>,
Anssi Hannula <anssi.hannula@bitwise.fi>
Cc: Jimmy Assarsson <jimmyassarsson@gmail.com>,
stable@vger.kernel.org, Jimmy Assarsson <extja@kvaser.com>
Subject: [PATCH v3 02/15] can: kvaser_usb: Fix use of uninitialized completion
Date: Thu, 1 Sep 2022 14:27:16 +0200 [thread overview]
Message-ID: <20220901122729.271-3-extja@kvaser.com> (raw)
In-Reply-To: <20220901122729.271-1-extja@kvaser.com>
From: Anssi Hannula <anssi.hannula@bitwise.fi>
flush_comp is initialized when CMD_FLUSH_QUEUE is sent to the device and
completed when the device sends CMD_FLUSH_QUEUE_RESP.
This causes completion of uninitialized completion if the device sends
CMD_FLUSH_QUEUE_RESP before CMD_FLUSH_QUEUE is ever sent (e.g. as a
response to a flush by a previously bound driver, or a misbehaving
device).
Fix that by initializing flush_comp in kvaser_usb_init_one() like the
other completions.
This issue is only triggerable after RX URBs have been set up, i.e. the
interface has been opened at least once.
Cc: stable@vger.kernel.org
Fixes: aec5fb2268b7 ("can: kvaser_usb: Add support for Kvaser USB hydra family")
Tested-by: Jimmy Assarsson <extja@kvaser.com>
Signed-off-by: Anssi Hannula <anssi.hannula@bitwise.fi>
Signed-off-by: Jimmy Assarsson <extja@kvaser.com>
---
Changes in v3:
- Rebased on 1d5eeda23f36 ("can: kvaser_usb: advertise timestamping capabilities and add ioctl support")
- Add stable to CC
- Add S-o-b
Changes in v2:
- Rebased on b3b6df2c56d8 ("can: kvaser_usb: kvaser_usb_leaf: fix bittiming limits")
drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c | 1 +
drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c
index 824cab80aa02..c2bce6773adc 100644
--- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c
+++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c
@@ -729,6 +729,7 @@ static int kvaser_usb_init_one(struct kvaser_usb *dev, int channel)
init_usb_anchor(&priv->tx_submitted);
init_completion(&priv->start_comp);
init_completion(&priv->stop_comp);
+ init_completion(&priv->flush_comp);
priv->can.ctrlmode_supported = 0;
priv->dev = dev;
diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c
index dd65c101bfb8..3dcd35979e6f 100644
--- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c
+++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c
@@ -1916,7 +1916,7 @@ static int kvaser_usb_hydra_flush_queue(struct kvaser_usb_net_priv *priv)
{
int err;
- init_completion(&priv->flush_comp);
+ reinit_completion(&priv->flush_comp);
err = kvaser_usb_hydra_send_simple_cmd(priv->dev, CMD_FLUSH_QUEUE,
priv->channel);
--
2.37.3
next prev parent reply other threads:[~2022-09-01 12:29 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-01 12:27 [PATCH v3 00/15] can: kvaser_usb: Various fixes Jimmy Assarsson
2022-09-01 12:27 ` [PATCH v3 01/15] can: kvaser_usb_leaf: Fix overread with an invalid command Jimmy Assarsson
2022-09-01 12:27 ` Jimmy Assarsson [this message]
2022-09-01 12:27 ` [PATCH v3 03/15] can: kvaser_usb: Fix possible completions during init_completion Jimmy Assarsson
2022-09-01 12:27 ` [PATCH v3 04/15] can: kvaser_usb: kvaser_usb_leaf: Get capabilities from device Jimmy Assarsson
2022-09-02 11:40 ` Anssi Hannula
2022-09-03 18:21 ` Jimmy Assarsson
2022-09-01 12:27 ` [PATCH v3 05/15] can: kvaser_usb: kvaser_usb_leaf: Rename {leaf,usbcan}_cmd_error_event to {leaf,usbcan}_cmd_can_error_event Jimmy Assarsson
2022-09-01 12:27 ` [PATCH v3 06/15] can: kvaser_usb: kvaser_usb_leaf: Handle CMD_ERROR_EVENT Jimmy Assarsson
2022-09-01 12:27 ` [PATCH v3 07/15] can: kvaser_usb_leaf: Set Warning state even without bus errors Jimmy Assarsson
2022-09-01 12:27 ` [PATCH v3 08/15] can: kvaser_usb_leaf: Fix TX queue out of sync after restart Jimmy Assarsson
2022-09-01 12:27 ` [PATCH v3 09/15] can: kvaser_usb_leaf: Fix CAN state " Jimmy Assarsson
2022-09-01 12:27 ` [PATCH v3 10/15] can: kvaser_usb_leaf: Fix improved state not being reported Jimmy Assarsson
2022-09-01 12:27 ` [PATCH v3 11/15] can: kvaser_usb_leaf: Fix wrong CAN state after stopping Jimmy Assarsson
2022-09-01 12:27 ` [PATCH v3 12/15] can: kvaser_usb_leaf: Ignore stale bus-off after start Jimmy Assarsson
2022-09-01 12:27 ` [PATCH v3 13/15] can: kvaser_usb_leaf: Fix bogus restart events Jimmy Assarsson
2022-09-01 12:27 ` [PATCH v3 14/15] can: kvaser_usb: Add struct kvaser_usb_busparams Jimmy Assarsson
2022-09-01 12:27 ` [PATCH v3 15/15] can: kvaser_usb: Compare requested bittiming parameters with actual parameters in do_set_{,data}_bittiming Jimmy Assarsson
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