From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Cc: fw@strlen.de
Subject: [PATCH nf] netfilter: nfnetlink_cthelper: cap to maximum number of expectation per master on updates
Date: Wed, 1 Jul 2026 12:46:57 +0200 [thread overview]
Message-ID: <20260701104657.199425-1-pablo@netfilter.org> (raw)
Really cap it to NF_CT_EXPECT_MAX_CNT (255) on updates.
The commit ("netfilter: nfnetlink_cthelper: cap to maximum number of
expectation per master") only covers creation of helpers, not updates.
Fixes: 397c8300972f ("netfilter: nf_conntrack_helper: cap maximum number of expectation at helper registration")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
net/netfilter/nfnetlink_cthelper.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/netfilter/nfnetlink_cthelper.c b/net/netfilter/nfnetlink_cthelper.c
index f1460b683d7a..c71966ca9955 100644
--- a/net/netfilter/nfnetlink_cthelper.c
+++ b/net/netfilter/nfnetlink_cthelper.c
@@ -314,6 +314,8 @@ nfnl_cthelper_update_policy_one(const struct nf_conntrack_expect_policy *policy,
new_policy->max_expected =
ntohl(nla_get_be32(tb[NFCTH_POLICY_EXPECT_MAX]));
+ if (!new_policy->max_expected)
+ new_policy->max_expected = NF_CT_EXPECT_MAX_CNT;
if (new_policy->max_expected > NF_CT_EXPECT_MAX_CNT)
return -EINVAL;
--
2.47.3
reply other threads:[~2026-07-01 10:47 UTC|newest]
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