From patchwork Wed Oct 19 18:30:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aaron Conole X-Patchwork-Id: 13012263 X-Patchwork-Delegate: kuba@kernel.org 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 25BBAC43219 for ; Wed, 19 Oct 2022 18:31:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230490AbiJSSbG (ORCPT ); Wed, 19 Oct 2022 14:31:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41878 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231183AbiJSSbC (ORCPT ); Wed, 19 Oct 2022 14:31:02 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0CDE1180241 for ; Wed, 19 Oct 2022 11:31:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1666204260; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=cRgh4VHZmDgEae/Ku6y8nsOB6SGNPgo//uwmO2M4VHY=; b=MT4HjwMd6HVtas53SXjMAxe+2tcQtFH6Wg1OTEvXosrpTzAuWh1WS6DHdYVhgy5RWu0ZXZ 2sDPp0qSIJH6FE+/edK3gTu7PtJcWLydOvi96z7+BSkeLWf4WIQUHRMLyY3KVJ/hKNeJmK /UVeHfCPQTAj6hscmC2e1h5JKJr+JUc= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-133-EgBaib-yN7muDCqz1b-bow-1; Wed, 19 Oct 2022 14:30:56 -0400 X-MC-Unique: EgBaib-yN7muDCqz1b-bow-1 Received: from smtp.corp.redhat.com (int-mx09.intmail.prod.int.rdu2.redhat.com [10.11.54.9]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id F2EA0185A7A9; Wed, 19 Oct 2022 18:30:55 +0000 (UTC) Received: from RHTPC1VM0NT.redhat.com (unknown [10.22.8.238]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6FC6149BB63; Wed, 19 Oct 2022 18:30:55 +0000 (UTC) From: Aaron Conole To: netdev@vger.kernel.org Cc: Pravin B Shelar , Jakub Kicinski , "David S. Miller" , Paolo Abeni , Eric Dumazet , Thomas Graf , Kevin Sprague , dev@openvswitch.org, Eelco Chaudron , Ilya Maximets , Shuah Khan , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH net 1/2] openvswitch: switch from WARN to pr_warn Date: Wed, 19 Oct 2022 14:30:53 -0400 Message-Id: <20221019183054.105815-2-aconole@redhat.com> In-Reply-To: <20221019183054.105815-1-aconole@redhat.com> References: <20221019183054.105815-1-aconole@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.9 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org As noted by Paolo Abeni, pr_warn doesn't generate any splat and can still preserve the warning to the user that feature downgrade occurred. We likely cannot introduce other kinds of checks / enforcement here because syzbot can generate different genl versions to the datapath. Reported-by: syzbot+31cde0bef4bbf8ba2d86@syzkaller.appspotmail.com Fixes: 44da5ae5fbea ("openvswitch: Drop user features if old user space attempted to create datapath") Cc: Thomas Graf Signed-off-by: Aaron Conole Acked-by: Ilya Maximets --- net/openvswitch/datapath.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c index c8a9075ddd0a..155263e73512 100644 --- a/net/openvswitch/datapath.c +++ b/net/openvswitch/datapath.c @@ -1616,7 +1616,8 @@ static void ovs_dp_reset_user_features(struct sk_buff *skb, if (IS_ERR(dp)) return; - WARN(dp->user_features, "Dropping previously announced user features\n"); + pr_warn("%s: Dropping previously announced user features\n", + ovs_dp_name(dp)); dp->user_features = 0; }