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 X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9ED97C49EA5 for ; Mon, 21 Jun 2021 16:38:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 89E9761431 for ; Mon, 21 Jun 2021 16:38:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233277AbhFUQjl (ORCPT ); Mon, 21 Jun 2021 12:39:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:55204 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233105AbhFUQfI (ORCPT ); Mon, 21 Jun 2021 12:35:08 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id EBAD5613E9; Mon, 21 Jun 2021 16:27:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1624292864; bh=tyB1EcYXocoWjk/o2K3zUbDZIg/c3hVAmwX9mg3Bygg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jr2A8d/nEwFuaI9cQAfmqW82Pg65Uiajw3bw24t9Lb992WXrfPpG+CB7NJY6pgVr4 6kVOXpsqL1f8erUGpeSwRqKYFz0f9njgOz+e1GmzSORQgxryMZnA/dyL9thHMfRfe5 WnoqMIqOAp59FWE3vTRDKgfeyL0ZZL/FI/NjLNLw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tetsuo Handa , syzbot+c0b807de416427ff3dd1@syzkaller.appspotmail.com, Sven Eckelmann , Simon Wunderlich , Sasha Levin Subject: [PATCH 5.12 013/178] batman-adv: Avoid WARN_ON timing related checks Date: Mon, 21 Jun 2021 18:13:47 +0200 Message-Id: <20210621154922.016207197@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210621154921.212599475@linuxfoundation.org> References: <20210621154921.212599475@linuxfoundation.org> User-Agent: quilt/0.66 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: Sven Eckelmann [ Upstream commit 9f460ae31c4435fd022c443a6029352217a16ac1 ] The soft/batadv interface for a queued OGM can be changed during the time the OGM was queued for transmission and when the OGM is actually transmitted by the worker. But WARN_ON must be used to denote kernel bugs and not to print simple warnings. A warning can simply be printed using pr_warn. Reported-by: Tetsuo Handa Reported-by: syzbot+c0b807de416427ff3dd1@syzkaller.appspotmail.com Fixes: ef0a937f7a14 ("batman-adv: consider outgoing interface in OGM sending") Signed-off-by: Sven Eckelmann Signed-off-by: Simon Wunderlich Signed-off-by: Sasha Levin --- net/batman-adv/bat_iv_ogm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/batman-adv/bat_iv_ogm.c b/net/batman-adv/bat_iv_ogm.c index a5e313cd6f44..b9dd150f6f01 100644 --- a/net/batman-adv/bat_iv_ogm.c +++ b/net/batman-adv/bat_iv_ogm.c @@ -409,8 +409,10 @@ static void batadv_iv_ogm_emit(struct batadv_forw_packet *forw_packet) if (WARN_ON(!forw_packet->if_outgoing)) return; - if (WARN_ON(forw_packet->if_outgoing->soft_iface != soft_iface)) + if (forw_packet->if_outgoing->soft_iface != soft_iface) { + pr_warn("%s: soft interface switch for queued OGM\n", __func__); return; + } if (forw_packet->if_incoming->if_status != BATADV_IF_ACTIVE) return; -- 2.30.2