Florian Westphal 563bb0f794 netfilter: nft_socket: only do sk lookups when indev is available
commit 743b83f15d4069ea57c3e40996bf4a1077e0cdc1 upstream.

Check if the incoming interface is available and NFT_BREAK
in case neither skb->sk nor input device are set.

Because nf_sk_lookup_slow*() assume packet headers are in the
'in' direction, use in postrouting is not going to yield a meaningful
result.  Same is true for the forward chain, so restrict the use
to prerouting, input and output.

Use in output work if a socket is already attached to the skb.

Fixes: 554ced0a6e29 ("netfilter: nf_tables: add support for native socket matching")
Reported-and-tested-by: Topi Miettinen <toiwoton@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-05-09 09:03:27 +02:00
..
2022-03-11 11:22:39 +01:00
2022-04-20 09:19:40 +02:00
2019-09-26 08:56:17 +02:00
2019-12-04 22:30:54 +01:00
2021-06-18 09:59:00 +02:00