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 3F69411CAB for ; Mon, 26 Jun 2023 18:46:28 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B3A45C433C8; Mon, 26 Jun 2023 18:46:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687805188; bh=abBPlFVTqCTG5P8wNMRRvd/+M/+7kCkrbNZuVHjnFcU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cCEns9B7ZB5cPEja77JI0HS3Kwp0+Dwo2CKp5PStk4wmYK41bnXlpm+HxCYz/omP8 rYYjGbseIBIkLwkzX7SpH8bH91ow8Pu5dR6pJe3PoTZ95qXzqSXjv5LMTWVWViEfUu 7ttjNIInojpLuUJCugOlV6eWcziNoJegWkBgw0Uc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Pablo Neira Ayuso Subject: [PATCH 5.10 80/81] netfilter: nf_tables: hold mutex on netns pre_exit path Date: Mon, 26 Jun 2023 20:13:02 +0200 Message-ID: <20230626180747.655975102@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230626180744.453069285@linuxfoundation.org> References: <20230626180744.453069285@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 commit 3923b1e4406680d57da7e873da77b1683035d83f upstream. clean_net() runs in workqueue while walking over the lists, grab mutex. Fixes: 767d1216bff8 ("netfilter: nftables: fix possible UAF over chains from packet path in netns") Signed-off-by: Pablo Neira Ayuso Signed-off-by: Greg Kroah-Hartman --- net/netfilter/nf_tables_api.c | 2 ++ 1 file changed, 2 insertions(+) --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -8983,7 +8983,9 @@ static int __net_init nf_tables_init_net static void __net_exit nf_tables_pre_exit_net(struct net *net) { + mutex_lock(&net->nft.commit_mutex); __nft_release_hooks(net); + mutex_unlock(&net->nft.commit_mutex); } static void __net_exit nf_tables_exit_net(struct net *net)