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From: Phil Turnbull <phil.turnbull@oracle.com>
To: netfilter-devel@vger.kernel.org
Cc: Pablo Neira Ayuso <pablo@netfilter.org>,
	Patrick McHardy <kaber@trash.net>,
	Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>,
	coreteam@netfilter.org, Phil Turnbull <phil.turnbull@oracle.com>
Subject: [PATCH nf] netfilter: nf_tables: validate NFTA_SET_TABLE parameter
Date: Fri, 27 May 2016 13:34:04 -0400	[thread overview]
Message-ID: <1464370444-28312-1-git-send-email-phil.turnbull@oracle.com> (raw)

If the NFTA_SET_TABLE parameter is missing and the NLM_F_DUMP flag is
not set, then a NULL pointer dereference is triggered in
nf_tables_set_lookup because ctx.table is NULL.

Signed-off-by: Phil Turnbull <phil.turnbull@oracle.com>
---
 net/netfilter/nf_tables_api.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index c444929..569ba6a 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -2647,6 +2647,8 @@ static int nf_tables_getset(struct net *net, struct sock *nlsk,
 	/* Only accept unspec with dump */
 	if (nfmsg->nfgen_family == NFPROTO_UNSPEC)
 		return -EAFNOSUPPORT;
+	if (!nla[NFTA_SET_TABLE])
+		return -EINVAL;
 
 	set = nf_tables_set_lookup(ctx.table, nla[NFTA_SET_NAME]);
 	if (IS_ERR(set))
-- 
2.8.0


             reply	other threads:[~2016-05-27 17:35 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-27 17:34 Phil Turnbull [this message]
2016-05-30  9:33 ` [PATCH nf] netfilter: nf_tables: validate NFTA_SET_TABLE parameter Pablo Neira Ayuso

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