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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 39668C433DF for ; Fri, 22 May 2020 14:57:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F2B28205CB for ; Fri, 22 May 2020 14:57:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1590159432; bh=EttFuyWUsVA2+0so7dutokKTLb7us68VFKlExgm5ag4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ylmQfxKqyb+s4+s/HcqyVrfLN3I0BDu6v2TfxR8FyV4t3/9Y6M1QanQ/c3dFenLob 1B7pPeCjd0SJZvwOXl/mG5jWbA3qMPucSa2G5Eb1C/OgJcWkjNccRy6rfZAKKccSS1 NKYRNpBgdCRquTH6P9NHs0od9Bnlu+6zbUyYhZQA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730778AbgEVOup (ORCPT ); Fri, 22 May 2020 10:50:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:52160 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730789AbgEVOuo (ORCPT ); Fri, 22 May 2020 10:50:44 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6DAD522257; Fri, 22 May 2020 14:50:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1590159044; bh=EttFuyWUsVA2+0so7dutokKTLb7us68VFKlExgm5ag4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TkBI0hfwRTwrp2FOBsZqCJAM5+ntnWo4MbvErzr0WbhmuXJ52XH8yz2vTs4KaVc4Z VUlrUjYLKPs0cBI1PP46TeOBsvz0rBmSyUz1O97/NZZ4ATvDKIkc9hZqfS9NeYoWKo HQrfkWiIH9T4XUaMdym6Gb5ncd0guMRGymrFWqiA= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Madhuparna Bhowmik , syzbot+bb82cafc737c002d11ca@syzkaller.appspotmail.com, "David S . Miller" , Sasha Levin , netdev@vger.kernel.org Subject: [PATCH AUTOSEL 5.6 41/41] drivers: net: hamradio: Fix suspicious RCU usage warning in bpqether.c Date: Fri, 22 May 2020 10:49:58 -0400 Message-Id: <20200522144959.434379-41-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200522144959.434379-1-sashal@kernel.org> References: <20200522144959.434379-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Madhuparna Bhowmik [ Upstream commit 95f59bf88bb75281cc626e283ecefdd5d5641427 ] This patch fixes the following warning: ============================= WARNING: suspicious RCU usage 5.7.0-rc5-next-20200514-syzkaller #0 Not tainted ----------------------------- drivers/net/hamradio/bpqether.c:149 RCU-list traversed in non-reader section!! Since rtnl lock is held, pass this cond in list_for_each_entry_rcu(). Reported-by: syzbot+bb82cafc737c002d11ca@syzkaller.appspotmail.com Signed-off-by: Madhuparna Bhowmik Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/hamradio/bpqether.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/net/hamradio/bpqether.c b/drivers/net/hamradio/bpqether.c index fbea6f232819..e2ad3c2e8df5 100644 --- a/drivers/net/hamradio/bpqether.c +++ b/drivers/net/hamradio/bpqether.c @@ -127,7 +127,8 @@ static inline struct net_device *bpq_get_ax25_dev(struct net_device *dev) { struct bpqdev *bpq; - list_for_each_entry_rcu(bpq, &bpq_devices, bpq_list) { + list_for_each_entry_rcu(bpq, &bpq_devices, bpq_list, + lockdep_rtnl_is_held()) { if (bpq->ethdev == dev) return bpq->axdev; } -- 2.25.1