Re: [PATCH] netfilter/nf_tables: fix UAF in catchall element removal

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Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxx> wrote:
> On Thu, 28 Dec 2023 at 06:38, Wander Lairson Costa <wander@xxxxxxxxxx> wrote:
> >
> > If the catchall element is gc'd when the pipapo set is removed, the element
> > can be deactivated twice.
> >
> > When a set is deleted, the nft_map_deactivate() is called to deactivate the
> > data of the set elements [1].
> 
> Please send this to the netdev list and netfilter-devel, it's already
> on a public list thanks to the stable cc.
> 
> Pablo & al - see
> 
>     https://lore.kernel.org/all/20231228143737.17712-1-wander@xxxxxxxxxx/
> 
> for the original full email.

Thanks.  I suspect the correct fix is

https://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf.git/commit/?id=7315dc1e122c85ffdfc8defffbb8f8b616c2eb1a

which missed the last pre-holiday-shutdown net pull request and
is thus still only in nf.git.




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