From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8BC24569D for ; Sun, 28 May 2023 19:26:14 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 13FC4C433D2; Sun, 28 May 2023 19:26:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1685301974; bh=O98pf8c6NbpihGkObk3xwEsHUefAA9YhDwltUcuQFZo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MPCYXJ8cK2CDGZlN/XP79p1SIx1sOmBDYR6EYE17fJDc09eXRvMWoDBcTeFe7Blsh +YlI2xVDNWz1unbdpa4U6zbUMB7yy8fxpP5WTcS2L4Dgs8rUqJPaTjR/oG08ozG+m8 JUl//eYmq4dY1kjJJ8mbGeUu0X6G2oECftuhP1Ws= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Pablo Neira Ayuso , Sasha Levin Subject: [PATCH 5.4 111/161] netfilter: nf_tables: validate NFTA_SET_ELEM_OBJREF based on NFT_SET_OBJECT flag Date: Sun, 28 May 2023 20:10:35 +0100 Message-Id: <20230528190840.609838798@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230528190837.051205996@linuxfoundation.org> References: <20230528190837.051205996@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Pablo Neira Ayuso [ 5a2f3dc31811e93be15522d9eb13ed61460b76c8 ] If the NFTA_SET_ELEM_OBJREF netlink attribute is present and NFT_SET_OBJECT flag is set on, report EINVAL. Move existing sanity check earlier to validate that NFT_SET_OBJECT requires NFTA_SET_ELEM_OBJREF. Fixes: 8aeff920dcc9 ("netfilter: nf_tables: add stateful object reference to set elements") Signed-off-by: Pablo Neira Ayuso Signed-off-by: Sasha Levin --- net/netfilter/nf_tables_api.c | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index c82c4635c0a96..e4eef4947cc75 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -4595,6 +4595,15 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set, return -EINVAL; } + if (set->flags & NFT_SET_OBJECT) { + if (!nla[NFTA_SET_ELEM_OBJREF] && + !(flags & NFT_SET_ELEM_INTERVAL_END)) + return -EINVAL; + } else { + if (nla[NFTA_SET_ELEM_OBJREF]) + return -EINVAL; + } + if ((flags & NFT_SET_ELEM_INTERVAL_END) && (nla[NFTA_SET_ELEM_DATA] || nla[NFTA_SET_ELEM_OBJREF] || @@ -4639,10 +4648,6 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set, } if (nla[NFTA_SET_ELEM_OBJREF] != NULL) { - if (!(set->flags & NFT_SET_OBJECT)) { - err = -EINVAL; - goto err2; - } obj = nft_obj_lookup(ctx->net, ctx->table, nla[NFTA_SET_ELEM_OBJREF], set->objtype, genmask); -- 2.39.2