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 7CE0EC433E1 for ; Fri, 22 May 2020 14:55:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4F6872145D for ; Fri, 22 May 2020 14:55:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1590159312; bh=EttFuyWUsVA2+0so7dutokKTLb7us68VFKlExgm5ag4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=0ZUE0ugI2DekXbrq/YLJFI9eMCPipwfhKuq/j3XTtrLZbVlHpjCOrHo92WkX8X0lB Rrhq05MguxEFDbm0IcgK6P1DaX0M99pxJxlxZHASbhdxMPQXhgqaweVsQzLq1oQUQ5 3deNG5Qx20HWp4Cvckm8NFAEa62MiaOcO3jOkt+0= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730936AbgEVOzC (ORCPT ); Fri, 22 May 2020 10:55:02 -0400 Received: from mail.kernel.org ([198.145.29.99]:53140 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730046AbgEVOvU (ORCPT ); Fri, 22 May 2020 10:51:20 -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 DE4D72240A; Fri, 22 May 2020 14:51:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1590159079; bh=EttFuyWUsVA2+0so7dutokKTLb7us68VFKlExgm5ag4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=a9UwBPSMflr2b4itKqsI9BSq9fTI9jPkJUrPbCyx6Vpup0IwDn+gM4CB9vb9yQmIr dzcLAEd1uPk5OUgulFnQZPRO60KOSMDTc7+Mu+qN/55ybfz81nTdI+ICMFBW2mblY6 MrYkkiBM6//zEYs787mCdNROWrPw7GMWVosqWHIo= 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 5.4 32/32] drivers: net: hamradio: Fix suspicious RCU usage warning in bpqether.c Date: Fri, 22 May 2020 10:50:44 -0400 Message-Id: <20200522145044.434677-32-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200522145044.434677-1-sashal@kernel.org> References: <20200522145044.434677-1-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