netfilter: nft_tproxy: restrict to prerouting hook

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[ Upstream commit 18bbc32133 ]

TPROXY is only allowed from prerouting, but nft_tproxy doesn't check this.
This fixes a crash (null dereference) when using tproxy from e.g. output.

Fixes: 4ed8eb6570 ("netfilter: nf_tables: Add native tproxy support")
Reported-by: Shell Chen <xierch@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Florian Westphal 2022-08-20 17:54:06 +02:00 • committed by Greg Kroah-Hartman

parent e53cfa017b

commit 343fed6b0d

1 changed files with 8 additions and 0 deletions

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net/netfilter/nft_tproxy.c

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