From: Arnd Bergmann
> Sent: 24 November 2020 15:18
>
> The ethtool compat ioctl handling is hidden away in net/socket.c,
> which introduces a couple of minor oddities:
>
...
> +
> +static int ethtool_rxnfc_copy_from_compat(struct ethtool_rxnfc *rxnfc,
> + const struct compat_ethtool_rxnfc
> __user *useraddr,
> + size_t size)
> +{
I think this (and possibly others) want a 'noinline_for_stack'.
So that both the normal and compat structures aren't both on the
stack when the real code is called.
David
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