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| author | Marc Kleine-Budde <mkl@pengutronix.de> | 2015-07-11 21:16:08 +0200 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2015-07-15 09:04:28 +0200 |
| commit | 9b721a4cefcbdedadbe72b5ec405046c139cf8ad (patch) | |
| tree | 175bb5f1b278821237259ae6e2865cb651488502 | |
| parent | 43c021e8d6844c4b0f5cc9eda10d232e7b87a456 (diff) | |
| download | linux-9b721a4cefcbdedadbe72b5ec405046c139cf8ad.tar.gz linux-9b721a4cefcbdedadbe72b5ec405046c139cf8ad.tar.xz | |
can: usb_8dev: don't touch skb after netif_rx()
There is no guarantee that the skb is in the same state after calling
net_receive_skb() or netif_rx(). It might be freed or reused. Not really
harmful as its a read access, except you turn on the proper debugging options
which catch a use after free.
Cc: Bernd Krumboeck <b.krumboeck@gmail.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
| -rw-r--r-- | drivers/net/can/usb/usb_8dev.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/net/can/usb/usb_8dev.c b/drivers/net/can/usb/usb_8dev.c index dd52c7a4c80d..de95b1ccba3e 100644 --- a/drivers/net/can/usb/usb_8dev.c +++ b/drivers/net/can/usb/usb_8dev.c @@ -461,10 +461,9 @@ static void usb_8dev_rx_err_msg(struct usb_8dev_priv *priv, priv->bec.txerr = txerr; priv->bec.rxerr = rxerr; - netif_rx(skb); - stats->rx_packets++; stats->rx_bytes += cf->can_dlc; + netif_rx(skb); } /* Read data and status frames */ @@ -494,10 +493,9 @@ static void usb_8dev_rx_can_msg(struct usb_8dev_priv *priv, else memcpy(cf->data, msg->data, cf->can_dlc); - netif_rx(skb); - stats->rx_packets++; stats->rx_bytes += cf->can_dlc; + netif_rx(skb); can_led_event(priv->netdev, CAN_LED_EVENT_RX); } else { |