Phil Sutter e18216cd0e netfilter: nft_exthdr: Search chunks in SCTP packets only
[ Upstream commit 5acc44f39458f43dac9724cefa4da29847cfe997 ]

Since user space does not generate a payload dependency, plain sctp
chunk matches cause searching in non-SCTP packets, too. Avoid this
potential mis-interpretation of packet data by checking pkt->tprot.

Fixes: 133dc203d77df ("netfilter: nft_exthdr: Support SCTP chunks")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-10-10 21:53:34 +02:00
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