netfilter: nf_tables: do not allow mismatch field size and set key length

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[ Upstream commit 3ce67e3793 ]

The set description provides the size of each field in the set whose sum
should not mismatch the set key length, bail out otherwise.

I did not manage to crash nft_set_pipapo with mismatch fields and set key
length so far, but this is UB which must be disallowed.

Fixes: f3a2181e16 ("netfilter: nf_tables: Support for sets with multiple ranged fields")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Pablo Neira Ayuso 2024-01-14 23:53:39 +01:00 • committed by Greg Kroah-Hartman

parent 7ae19ee81c

commit 9cb084df01

1 changed files with 5 additions and 1 deletions

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net/netfilter/nf_tables_api.c

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