netfilter: nf_tables: validate .maxattr at expression registration

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struct nft_expr_info allows to store up to NFT_EXPR_MAXATTR (16)
attributes when parsing netlink attributes.

Rise a warning in case there is ever a nft expression whose .maxattr
goes beyond this number of expressions, in such case, struct nft_expr_info
needs to be updated.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

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Pablo Neira Ayuso 2024-01-06 23:52:02 +01:00

parent 0617c3de9b

commit 65b3bd600e

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net/netfilter/nf_tables_api.c

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