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 B4E7A1C4EE6; Tue, 27 Aug 2024 14:45:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724769915; cv=none; b=BOj+2l5lhVFBCwYjZsabc5BNL5VFSuRZiakIehxt7W4O46VZGGn4H29OZhJ+0h46566VzmzyTGQDy0zfFZ2+xBcppg+1HspzDEJ+o/mIIw2dcaqThLDEmrOiRrV3MoNAfJKczedLA2L+a/cWsRdayIPSdruM/aDvDT6oLcUebPo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724769915; c=relaxed/simple; bh=xYggnPNZnO72M1AfetiMXbjEUQTC1DPmUSzTDLsJZjI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=c73Qy8YMdNPmQ6fzJRcxAUKqqPU1KhIUgdn5efWvMQQ0HcAO7yFewPX2n4Sz6XkAMBpQ5EPrWx9cq7hLBNOmtz+350JyxtAlK0KKcf1Ki+gUUKbqxcW/WqCoAFymWWpEZuoQh5Ry+0HYX/qacrIfUi2o6K63rUGTNe6hRzXmrrw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=UdNopD7N; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="UdNopD7N" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DCC31C6106C; Tue, 27 Aug 2024 14:45:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1724769915; bh=xYggnPNZnO72M1AfetiMXbjEUQTC1DPmUSzTDLsJZjI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UdNopD7NbI++7AyzTY61l2V33sazSkTGnGJkHYkQcKn6aUQGD3NmzPQlWhIzrAalb g+xy9izptezW98sLFxXPLJYIVND9F1Yuq+hCvrcYdk1rrBOkxhFC/Ge/BxmyFFToPQ 7vdIEYd7qoWekWUck1xc8WOqBingd/A4j63AJ5uA= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Phil Sutter , Florian Westphal , Pablo Neira Ayuso , Sasha Levin Subject: [PATCH 6.6 073/341] netfilter: nf_tables: Introduce nf_tables_getobj_single Date: Tue, 27 Aug 2024 16:35:04 +0200 Message-ID: <20240827143846.188503447@linuxfoundation.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240827143843.399359062@linuxfoundation.org> References: <20240827143843.399359062@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Phil Sutter [ Upstream commit 69fc3e9e90f1afc11f4015e6b75d18ab9acee348 ] Outsource the reply skb preparation for non-dump getrule requests into a distinct function. Prep work for object reset locking. Signed-off-by: Phil Sutter Reviewed-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso Stable-dep-of: bd662c4218f9 ("netfilter: nf_tables: Add locking for NFT_MSG_GETOBJ_RESET requests") Signed-off-by: Sasha Levin --- net/netfilter/nf_tables_api.c | 75 ++++++++++++++++++++--------------- 1 file changed, 44 insertions(+), 31 deletions(-) diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index 170f6f624ac16..a3ed9437e21b4 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -7815,10 +7815,10 @@ static int nf_tables_dump_obj_done(struct netlink_callback *cb) } /* called with rcu_read_lock held */ -static int nf_tables_getobj(struct sk_buff *skb, const struct nfnl_info *info, - const struct nlattr * const nla[]) +static struct sk_buff * +nf_tables_getobj_single(u32 portid, const struct nfnl_info *info, + const struct nlattr * const nla[], bool reset) { - const struct nftables_pernet *nft_net = nft_pernet(info->net); struct netlink_ext_ack *extack = info->extack; u8 genmask = nft_genmask_cur(info->net); u8 family = info->nfmsg->nfgen_family; @@ -7826,52 +7826,69 @@ static int nf_tables_getobj(struct sk_buff *skb, const struct nfnl_info *info, struct net *net = info->net; struct nft_object *obj; struct sk_buff *skb2; - bool reset = false; u32 objtype; - char *buf; int err; - if (info->nlh->nlmsg_flags & NLM_F_DUMP) { - struct netlink_dump_control c = { - .start = nf_tables_dump_obj_start, - .dump = nf_tables_dump_obj, - .done = nf_tables_dump_obj_done, - .module = THIS_MODULE, - .data = (void *)nla, - }; - - return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c); - } - if (!nla[NFTA_OBJ_NAME] || !nla[NFTA_OBJ_TYPE]) - return -EINVAL; + return ERR_PTR(-EINVAL); table = nft_table_lookup(net, nla[NFTA_OBJ_TABLE], family, genmask, 0); if (IS_ERR(table)) { NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_TABLE]); - return PTR_ERR(table); + return ERR_CAST(table); } objtype = ntohl(nla_get_be32(nla[NFTA_OBJ_TYPE])); obj = nft_obj_lookup(net, table, nla[NFTA_OBJ_NAME], objtype, genmask); if (IS_ERR(obj)) { NL_SET_BAD_ATTR(extack, nla[NFTA_OBJ_NAME]); - return PTR_ERR(obj); + return ERR_CAST(obj); } skb2 = alloc_skb(NLMSG_GOODSIZE, GFP_ATOMIC); if (!skb2) - return -ENOMEM; + return ERR_PTR(-ENOMEM); + + err = nf_tables_fill_obj_info(skb2, net, portid, + info->nlh->nlmsg_seq, NFT_MSG_NEWOBJ, 0, + family, table, obj, reset); + if (err < 0) { + kfree_skb(skb2); + return ERR_PTR(err); + } + + return skb2; +} + +static int nf_tables_getobj(struct sk_buff *skb, const struct nfnl_info *info, + const struct nlattr * const nla[]) +{ + struct nftables_pernet *nft_net = nft_pernet(info->net); + u32 portid = NETLINK_CB(skb).portid; + struct net *net = info->net; + struct sk_buff *skb2; + bool reset = false; + char *buf; + + if (info->nlh->nlmsg_flags & NLM_F_DUMP) { + struct netlink_dump_control c = { + .start = nf_tables_dump_obj_start, + .dump = nf_tables_dump_obj, + .done = nf_tables_dump_obj_done, + .module = THIS_MODULE, + .data = (void *)nla, + }; + + return nft_netlink_dump_start_rcu(info->sk, skb, info->nlh, &c); + } if (NFNL_MSG_TYPE(info->nlh->nlmsg_type) == NFT_MSG_GETOBJ_RESET) reset = true; - err = nf_tables_fill_obj_info(skb2, net, NETLINK_CB(skb).portid, - info->nlh->nlmsg_seq, NFT_MSG_NEWOBJ, 0, - family, table, obj, reset); - if (err < 0) - goto err_fill_obj_info; + skb2 = nf_tables_getobj_single(portid, info, nla, reset); + if (IS_ERR(skb2)) + return PTR_ERR(skb2); if (!reset) return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid); @@ -7884,11 +7901,7 @@ static int nf_tables_getobj(struct sk_buff *skb, const struct nfnl_info *info, AUDIT_NFT_OP_OBJ_RESET, GFP_ATOMIC); kfree(buf); - return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid); - -err_fill_obj_info: - kfree_skb(skb2); - return err; + return nfnetlink_unicast(skb2, net, portid); } static void nft_obj_destroy(const struct nft_ctx *ctx, struct nft_object *obj) -- 2.43.0