netfilter: nf_conntrack: Add allow_clash to generic protocol handler

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[ Upstream commit 8a49fc8d8a ]

The upstream commit, 71d8c47fc6
 ("netfilter: conntrack: introduce clash resolution on insertion race"),
sets allow_clash=true in the UDP/UDPLITE protocol handler
but does not set it in the generic protocol handler.

As a result, packets composed of connectionless protocols at each layer,
such as UDP over IP-in-IP, still drop packets due to conflicts during conntrack insertion.

To resolve this, this patch sets allow_clash in the nf_conntrack_l4proto_generic.

Signed-off-by: Yuto Hamaguchi <Hamaguchi.Yuto@da.MitsubishiElectric.co.jp>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Yuto Hamaguchi 2025-12-19 20:53:51 +09:00 • committed by Sasha Levin

parent 74431472d1

commit 29f51913cb

1 changed files with 1 additions and 0 deletions

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net/netfilter/nf_conntrack_proto_generic.c

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