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 56538146A64; Thu, 11 Apr 2024 10:23:54 +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=1712831034; cv=none; b=qZZfDeEC98pAzYo4FgajkI9SvsrYLYRTTsWYCLEaRa4rfKu64FNme/baFLjuQHIOu2Xna0UOVA7jCp/CfxZbvoNhtxu8Zi6yDkZlwxtMyTT667Q2YDsEYplU/WmguMGSKci4zJvjqb7IMRySSh7YtDRAYoj2nzYV9mzkUk8fHHA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712831034; c=relaxed/simple; bh=fSAXaUo0l0NsWcJ9YSBEb0i2CUN6pYDGVqlOAS6O+T8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Uu0NOjWxSVjYXGVGQ0zAfmkgUGCbQI01vMuq6FZ9oZa7jzAN7ogGxxDaYWbyKD/6j8Ybm6LBlPXsBgdcMDRTbUFXU1+FIej5EtaR8ts/PotzpwAfskuh+xHc+ym5ofZBq86tK1XvmCjFP/zeC3D+bci6AqmG/vZTkvxoELMgWSk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=rngwmlw3; 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="rngwmlw3" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CDA32C433F1; Thu, 11 Apr 2024 10:23:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1712831034; bh=fSAXaUo0l0NsWcJ9YSBEb0i2CUN6pYDGVqlOAS6O+T8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rngwmlw3cCz+IDK8kgM13PfUWb3fudjrf7HjotCWz3oqSR1X12enDnz2F8SUW1GwK BnywMOcPjsdgahHmRhVv3saKNrkEA/e9NgLv7kf64WAtOpuZHbWsHDNIO9zOhcUQrD YVMQFncBweDb3OkCyzBbw5Mi5kSjxhswjDHYv3jQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Pablo Neira Ayuso , Sasha Levin Subject: [PATCH 5.4 202/215] netfilter: nf_tables: release batch on table validation from abort path Date: Thu, 11 Apr 2024 11:56:51 +0200 Message-ID: <20240411095430.929370795@linuxfoundation.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240411095424.875421572@linuxfoundation.org> References: <20240411095424.875421572@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 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Pablo Neira Ayuso commit a45e6889575c2067d3c0212b6bc1022891e65b91 upstream. Unlike early commit path stage which triggers a call to abort, an explicit release of the batch is required on abort, otherwise mutex is released and commit_list remains in place. Add WARN_ON_ONCE to ensure commit_list is empty from the abort path before releasing the mutex. After this patch, commit_list is always assumed to be empty before grabbing the mutex, therefore 03c1f1ef1584 ("netfilter: Cleanup nft_net->module_list from nf_tables_exit_net()") only needs to release the pending modules for registration. Cc: stable@vger.kernel.org Fixes: c0391b6ab810 ("netfilter: nf_tables: missing validation from the abort path") Signed-off-by: Pablo Neira Ayuso Signed-off-by: Sasha Levin --- net/netfilter/nf_tables_api.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index f4821d64c2fd8..b719f3517caf1 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -7564,10 +7564,11 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action) struct nftables_pernet *nft_net = net_generic(net, nf_tables_net_id); struct nft_trans *trans, *next; struct nft_trans_elem *te; + int err = 0; if (action == NFNL_ABORT_VALIDATE && nf_tables_validate(net) < 0) - return -EAGAIN; + err = -EAGAIN; list_for_each_entry_safe_reverse(trans, next, &nft_net->commit_list, list) { @@ -7700,7 +7701,7 @@ static int __nf_tables_abort(struct net *net, enum nfnl_abort_action action) else nf_tables_module_autoload_cleanup(net); - return 0; + return err; } static int nf_tables_abort(struct net *net, struct sk_buff *skb, @@ -7714,6 +7715,8 @@ static int nf_tables_abort(struct net *net, struct sk_buff *skb, ret = __nf_tables_abort(net, action); nft_gc_seq_end(nft_net, gc_seq); + WARN_ON_ONCE(!list_empty(&nft_net->commit_list)); + mutex_unlock(&nft_net->commit_mutex); return ret; @@ -8400,8 +8403,11 @@ static void __net_exit nf_tables_exit_net(struct net *net) gc_seq = nft_gc_seq_begin(nft_net); - if (!list_empty(&nft_net->commit_list)) - __nf_tables_abort(net, NFNL_ABORT_NONE); + WARN_ON_ONCE(!list_empty(&nft_net->commit_list)); + + if (!list_empty(&nft_net->module_list)) + nf_tables_module_autoload_cleanup(net); + __nft_release_tables(net); nft_gc_seq_end(nft_net, gc_seq); -- 2.43.0