From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9DCD9C38145 for ; Fri, 2 Sep 2022 12:22:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236120AbiIBMWR (ORCPT ); Fri, 2 Sep 2022 08:22:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47874 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235811AbiIBMVP (ORCPT ); Fri, 2 Sep 2022 08:21:15 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A851E5F126; Fri, 2 Sep 2022 05:20:43 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 4006E620E6; Fri, 2 Sep 2022 12:20:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4DF5EC433C1; Fri, 2 Sep 2022 12:20:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1662121242; bh=yjFbBlaMaiW1xyHU4qJxXDx2fbTonaU5u23wM7iThqU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=1QO10Ysz98stHZCAWoFD9yL01dBiz8wHxBu/cdrCwpnJQRCAxR/NPzuXfqHjrAQuv +rfB/0F9bTaxzSeDN75VRIyRiO8b/5Uhz4+Zb/BdPW3ybE/lzJWys8mBIntjKdj0wu gqBi65WytJoDm1IPc6AfZi3Q4VRpP2nxyU10DnoU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Abhishek Shah , Herbert Xu , Steffen Klassert , Sasha Levin Subject: [PATCH 4.9 03/31] af_key: Do not call xfrm_probe_algs in parallel Date: Fri, 2 Sep 2022 14:18:29 +0200 Message-Id: <20220902121356.874120507@linuxfoundation.org> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20220902121356.732130937@linuxfoundation.org> References: <20220902121356.732130937@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Herbert Xu [ Upstream commit ba953a9d89a00c078b85f4b190bc1dde66fe16b5 ] When namespace support was added to xfrm/afkey, it caused the previously single-threaded call to xfrm_probe_algs to become multi-threaded. This is buggy and needs to be fixed with a mutex. Reported-by: Abhishek Shah Fixes: 283bc9f35bbb ("xfrm: Namespacify xfrm state/policy locks") Signed-off-by: Herbert Xu Signed-off-by: Steffen Klassert Signed-off-by: Sasha Levin --- net/key/af_key.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/key/af_key.c b/net/key/af_key.c index 0737fc7b7ebdb..88d4a3a02ab72 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -1724,9 +1724,12 @@ static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sad pfk->registered |= (1<sadb_msg_satype); } + mutex_lock(&pfkey_mutex); xfrm_probe_algs(); supp_skb = compose_sadb_supported(hdr, GFP_KERNEL | __GFP_ZERO); + mutex_unlock(&pfkey_mutex); + if (!supp_skb) { if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) pfk->registered &= ~(1<sadb_msg_satype); -- 2.35.1