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netfilter: ctnetlink: reject new conntrack request with different l4proto

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Currently, user can add a conntrack with different l4proto via nfnetlink.
For example, original tuple is TCP while reply tuple is SCTP. This is
invalid combination, we should report EINVAL to userspace.

Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Liping Zhang 2016-08-08 22:10:26 +08:00 • committed by Pablo Neira Ayuso
parent 00a3101f56
commit aa0c2c68ab
1 changed files with 2 additions and 0 deletions
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2
net/netfilter/nf_conntrack_netlink.c
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@ -1894,6 +1894,8 @@ static int ctnetlink_new_conntrack(struct net *net, struct sock *ctnl,
if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY]) if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY])
return -EINVAL; return -EINVAL;
if (otuple.dst.protonum != rtuple.dst.protonum)
return -EINVAL;
ct = ctnetlink_create_conntrack(net, &zone, cda, &otuple, ct = ctnetlink_create_conntrack(net, &zone, cda, &otuple,
&rtuple, u3); &rtuple, u3);