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| author | Oliver Hartkopp <socketcan@hartkopp.net> | 2022-11-02 10:54:31 +0100 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2022-11-07 14:00:27 +0100 |
| commit | ae64438be1923e3c1102d90fd41db7afcfaf54cc (patch) | |
| tree | 4653f59a5d91825bee51259007370416134a0663 /drivers/net/can/usb/mcba_usb.c | |
| parent | 3eb3d283e8579a22b81dd2ac3987b77465b2a22f (diff) | |
| download | linux-stable-ae64438be1923e3c1102d90fd41db7afcfaf54cc.tar.gz linux-stable-ae64438be1923e3c1102d90fd41db7afcfaf54cc.tar.bz2 linux-stable-ae64438be1923e3c1102d90fd41db7afcfaf54cc.zip | |
can: dev: fix skb drop check
In commit a6d190f8c767 ("can: skb: drop tx skb if in listen only
mode") the priv->ctrlmode element is read even on virtual CAN
interfaces that do not create the struct can_priv at startup. This
out-of-bounds read may lead to CAN frame drops for virtual CAN
interfaces like vcan and vxcan.
This patch mainly reverts the original commit and adds a new helper
for CAN interface drivers that provide the required information in
struct can_priv.
Fixes: a6d190f8c767 ("can: skb: drop tx skb if in listen only mode")
Reported-by: Dariusz Stojaczyk <Dariusz.Stojaczyk@opensynergy.com>
Cc: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Cc: Max Staudt <max@enpas.org>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Acked-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/all/20221102095431.36831-1-socketcan@hartkopp.net
Cc: stable@vger.kernel.org # 6.0.x
[mkl: patch pch_can, too]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can/usb/mcba_usb.c')
| -rw-r--r-- | drivers/net/can/usb/mcba_usb.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/can/usb/mcba_usb.c b/drivers/net/can/usb/mcba_usb.c index 69346c63021f..218b098b261d 100644 --- a/drivers/net/can/usb/mcba_usb.c +++ b/drivers/net/can/usb/mcba_usb.c @@ -311,7 +311,7 @@ static netdev_tx_t mcba_usb_start_xmit(struct sk_buff *skb, .cmd_id = MBCA_CMD_TRANSMIT_MESSAGE_EV }; - if (can_dropped_invalid_skb(netdev, skb)) + if (can_dev_dropped_skb(netdev, skb)) return NETDEV_TX_OK; ctx = mcba_usb_get_free_ctx(priv, cf); |