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 F40381F0E36; Tue, 21 Jan 2025 18:06:51 +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=1737482812; cv=none; b=TO7LIoT3fWUn58RxHqKRe7N2TZCRX5Hgn9memYq70fhFE83JRtKWcoVQxgFIrf/WY0Dd5483DXzKmoLaqaNwPcPtzlJ+43ZrY5NvaqhaZlwrHBf28ydngJMODNh6hr3oIX5Pauc3IzFKTw9g8MTb73JMLrNUKLs2Zwrsm8xWOWw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737482812; c=relaxed/simple; bh=B9nioNq9i0La0FNtuTwzgjWfTGX29Iudx2oVYklVRAQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pgDDC7X6Hb6NSSak2gOkTI+EN3Bw5oAOxCFnn9W4c4PulZwhqnfxJ0IV97l7BL+lj+Jeb3+uwhyczCvsJxoUNSeRRybyoKBuKAsM+KuYR+GlodBTGgp5OMah7V2Bl8lJGjgfUB9Ww5qe841ZBrMrzqx4I4TPGrrjHwoaG99KuAU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=E4VN6HXF; 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="E4VN6HXF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7EA27C4CEDF; Tue, 21 Jan 2025 18:06:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1737482811; bh=B9nioNq9i0La0FNtuTwzgjWfTGX29Iudx2oVYklVRAQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=E4VN6HXF8qUL0ZaS9UKIiktPHn7UOUhoeDYMc5fimrPNJ45+aRGfWHzzwIYN4ZiWG Hovg1TK3MPzsQzh43QHMz05waieliSLT1DsNbl42cxF79uwFLQPHhKeb1J6/cPuCGy BJNhqpwbhCxBidqL1d6pWU/+ZzsbBJXVyDyrlGgo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Phil Sutter , Pablo Neira Ayuso , Sasha Levin Subject: [PATCH 5.15 017/127] netfilter: nf_tables: imbalance in flowtable binding Date: Tue, 21 Jan 2025 18:51:29 +0100 Message-ID: <20250121174530.337602491@linuxfoundation.org> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250121174529.674452028@linuxfoundation.org> References: <20250121174529.674452028@linuxfoundation.org> User-Agent: quilt/0.68 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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pablo Neira Ayuso [ Upstream commit 13210fc63f353fe78584048079343413a3cdf819 ] All these cases cause imbalance between BIND and UNBIND calls: - Delete an interface from a flowtable with multiple interfaces - Add a (device to a) flowtable with --check flag - Delete a netns containing a flowtable - In an interactive nft session, create a table with owner flag and flowtable inside, then quit. Fix it by calling FLOW_BLOCK_UNBIND when unregistering hooks, then remove late FLOW_BLOCK_UNBIND call when destroying flowtable. Fixes: ff4bf2f42a40 ("netfilter: nf_tables: add nft_unregister_flowtable_hook()") Reported-by: Phil Sutter Tested-by: Phil Sutter Signed-off-by: Pablo Neira Ayuso Signed-off-by: Sasha Levin --- net/netfilter/nf_tables_api.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index 7fdeed8a3186..e86cc6f4ce9d 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -7794,6 +7794,7 @@ static void nft_unregister_flowtable_hook(struct net *net, } static void __nft_unregister_flowtable_net_hooks(struct net *net, + struct nft_flowtable *flowtable, struct list_head *hook_list, bool release_netdev) { @@ -7801,6 +7802,8 @@ static void __nft_unregister_flowtable_net_hooks(struct net *net, list_for_each_entry_safe(hook, next, hook_list, list) { nf_unregister_net_hook(net, &hook->ops); + flowtable->data.type->setup(&flowtable->data, hook->ops.dev, + FLOW_BLOCK_UNBIND); if (release_netdev) { list_del(&hook->list); kfree_rcu(hook, rcu); @@ -7809,9 +7812,10 @@ static void __nft_unregister_flowtable_net_hooks(struct net *net, } static void nft_unregister_flowtable_net_hooks(struct net *net, + struct nft_flowtable *flowtable, struct list_head *hook_list) { - __nft_unregister_flowtable_net_hooks(net, hook_list, false); + __nft_unregister_flowtable_net_hooks(net, flowtable, hook_list, false); } static int nft_register_flowtable_net_hooks(struct net *net, @@ -8433,8 +8437,6 @@ static void nf_tables_flowtable_destroy(struct nft_flowtable *flowtable) flowtable->data.type->free(&flowtable->data); list_for_each_entry_safe(hook, next, &flowtable->hook_list, list) { - flowtable->data.type->setup(&flowtable->data, hook->ops.dev, - FLOW_BLOCK_UNBIND); list_del_rcu(&hook->list); kfree_rcu(hook, rcu); } @@ -9668,6 +9670,7 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb) &nft_trans_flowtable_hooks(trans), NFT_MSG_DELFLOWTABLE); nft_unregister_flowtable_net_hooks(net, + nft_trans_flowtable(trans), &nft_trans_flowtable_hooks(trans)); } else { list_del_rcu(&nft_trans_flowtable(trans)->list); @@ -9676,6 +9679,7 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb) &nft_trans_flowtable(trans)->hook_list, NFT_MSG_DELFLOWTABLE); nft_unregister_flowtable_net_hooks(net, + nft_trans_flowtable(trans), &nft_trans_flowtable(trans)->hook_list); } break; @@ -9906,11 +9910,13 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action) case NFT_MSG_NEWFLOWTABLE: if (nft_trans_flowtable_update(trans)) { nft_unregister_flowtable_net_hooks(net, + nft_trans_flowtable(trans), &nft_trans_flowtable_hooks(trans)); } else { nft_use_dec_restore(&trans->ctx.table->use); list_del_rcu(&nft_trans_flowtable(trans)->list); nft_unregister_flowtable_net_hooks(net, + nft_trans_flowtable(trans), &nft_trans_flowtable(trans)->hook_list); } break; @@ -10451,7 +10457,8 @@ static void __nft_release_hook(struct net *net, struct nft_table *table) list_for_each_entry(chain, &table->chains, list) __nf_tables_unregister_hook(net, table, chain, true); list_for_each_entry(flowtable, &table->flowtables, list) - __nft_unregister_flowtable_net_hooks(net, &flowtable->hook_list, + __nft_unregister_flowtable_net_hooks(net, flowtable, + &flowtable->hook_list, true); } -- 2.39.5