can: c_can: Do not access skb after net_receive_skb()

can: c_can: Do not access skb after net_receive_skb()

There is no guarantee that the skb is in the same state after calling
net_receive_skb(). 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.

The whole can subsystem is full of this. Copy and paste ....

Signed-off-by: Thomas Gleixner <[email protected]>
Tested-by: Alexander Stein <[email protected]>
Signed-off-by: Marc Kleine-Budde <[email protected]>