From patchwork Tue Mar 31 08:57:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 228642 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=-6.9 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham 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 C0257C2D0EF for ; Tue, 31 Mar 2020 09:12:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8C81520772 for ; Tue, 31 Mar 2020 09:12:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585645921; bh=NeubGs2Kg9duRgrqga3UHI//e9k9vjc8bZ8Y4TZt8vM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ZtBcQECkSF0dfzhFIrLUyPMSLOnD3GlHrvm1PwjojvfpZkUpW0jST7o69yDejeW/8 xuCURgzVBzt9hZlPrYDo3TtXfYxY8uYW6g0rs25U3/6WK8DC5oYLYg7rz7kMvPald8 +9ICA8NOrgIm9i7SaeqsnnNJzV3WaFRybfQDkHwY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731010AbgCaJMA (ORCPT ); Tue, 31 Mar 2020 05:12:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:57628 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731130AbgCaJL7 (ORCPT ); Tue, 31 Mar 2020 05:11:59 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1B47920675; Tue, 31 Mar 2020 09:11:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585645918; bh=NeubGs2Kg9duRgrqga3UHI//e9k9vjc8bZ8Y4TZt8vM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wnlqZ+dtWUP+SngBzlZhn05yZ8iNKSRpzqENPHX+8O3gg5adOujSzWA2GabUgMbJA uahl9xzxz3A3XDquDK0AiOMmpTp9EvDEwe3hboaMoxsXai2389k10IzzNaADWdOgc2 bLxMfCC+Phi1l/Ax5+FFFpmPk1ZnB9dHcChLut/A= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, yangerkun , Oliver Hartkopp , "David S. Miller" Subject: [PATCH 5.4 034/155] slcan: not call free_netdev before rtnl_unlock in slcan_open Date: Tue, 31 Mar 2020 10:57:54 +0200 Message-Id: <20200331085422.232711172@linuxfoundation.org> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200331085418.274292403@linuxfoundation.org> References: <20200331085418.274292403@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Oliver Hartkopp [ Upstream commit 2091a3d42b4f339eaeed11228e0cbe9d4f92f558 ] As the description before netdev_run_todo, we cannot call free_netdev before rtnl_unlock, fix it by reorder the code. This patch is a 1:1 copy of upstream slip.c commit f596c87005f7 ("slip: not call free_netdev before rtnl_unlock in slip_open"). Reported-by: yangerkun Signed-off-by: Oliver Hartkopp Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/can/slcan.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/net/can/slcan.c +++ b/drivers/net/can/slcan.c @@ -625,7 +625,10 @@ err_free_chan: tty->disc_data = NULL; clear_bit(SLF_INUSE, &sl->flags); slc_free_netdev(sl->dev); + /* do not call free_netdev before rtnl_unlock */ + rtnl_unlock(); free_netdev(sl->dev); + return err; err_exit: rtnl_unlock();