netfilter: nft_exthdr: Search chunks in SCTP packets only

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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: 133dc203d7 ("netfilter: nft_exthdr: Support SCTP chunks")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

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Phil Sutter 2021-06-11 19:06:45 +02:00 • committed by Pablo Neira Ayuso

parent c765449591

commit 5acc44f394

1 changed files with 4 additions and 1 deletions

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net/netfilter/nft_exthdr.c

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