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can: ems_usb: 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: Gerhard Uttenthaler <uttenthaler@ems-wuensche.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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1 changed files with 2 additions and 4 deletions
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@ -324,10 +324,9 @@ static void ems_usb_rx_can_msg(struct ems_usb *dev, struct ems_cpc_msg *msg)
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cf->data[i] = msg->msg.can_msg.msg[i];
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}
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netif_rx(skb);
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stats->rx_packets++;
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stats->rx_bytes += cf->can_dlc;
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netif_rx(skb);
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}
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static void ems_usb_rx_err(struct ems_usb *dev, struct ems_cpc_msg *msg)
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@ -400,10 +399,9 @@ static void ems_usb_rx_err(struct ems_usb *dev, struct ems_cpc_msg *msg)
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stats->rx_errors++;
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}
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netif_rx(skb);
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stats->rx_packets++;
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stats->rx_bytes += cf->can_dlc;
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netif_rx(skb);
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}
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/*
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