Re: [iptables PATCH 4/4] nft: cache: Review flush_cache()

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On Mon, Mar 02, 2020 at 06:53:58PM +0100, Phil Sutter wrote:
> While fixing for iptables-nft-restore under stress, I managed to hit
> NULL-pointer deref in flush_cache(). Given that nftnl_*_list_free()
> functions are not NULL-pointer tolerant, better make sure such are not
> passed by accident.

Could you explain what sequence is triggering the NULL-pointer
dereference?

Thank you.



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