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=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 16EDCC433E1 for ; Fri, 5 Jun 2020 04:20:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E430E207D5 for ; Fri, 5 Jun 2020 04:20:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591330833; bh=mUYneMrzaiNn9rTCGEljoNFn994CQhp26djJwVh/jvo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=Z+NEtT3KB2zeCz1vcgFh4jWEBfV4C+HNH3Yl9jGtHldDP54jXP1Zx5ZCSovl0aapW ldnNHsBcDmUyfcL7bkJsZMF32z0IFJnDzEbQZ2tU/yueHM9A2s7l+K84cHIcGA/RGh mcmLecYgaTS1brsAcpUB5LgUvMz6+uQ84oBMjMQY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726171AbgFEEUb (ORCPT ); Fri, 5 Jun 2020 00:20:31 -0400 Received: from mail.kernel.org ([198.145.29.99]:55136 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725280AbgFEEUb (ORCPT ); Fri, 5 Jun 2020 00:20:31 -0400 Received: from sol.localdomain (c-107-3-166-239.hsd1.ca.comcast.net [107.3.166.239]) (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 C8A50206E6; Fri, 5 Jun 2020 04:20:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591330831; bh=mUYneMrzaiNn9rTCGEljoNFn994CQhp26djJwVh/jvo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=RP15mK3U/ux79hejNbii2Kkoc/Ho2za+adJCpaDB9KaeW1RhjneupZUO2K2ozftix vWbawHKQpD8H/5wjNPlb+1MRCrUQYl/M1z4Or8Xte02W7JU+8Ba+pyvuvnqUH7CezG dNcN8MleatmwCVj8vm0Z5dZO6tNU/j9TkRqZ0wyw= Date: Thu, 4 Jun 2020 21:20:29 -0700 From: Eric Biggers To: Randy Dunlap Cc: syzbot , brendanhiggins@google.com, gregkh@linuxfoundation.org, heikki.krogerus@linux.intel.com, laurent.pinchart@ideasonboard.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, rafael.j.wysocki@intel.com, sakari.ailus@linux.intel.com, syzkaller-bugs@googlegroups.com Subject: Re: possible deadlock in media_devnode_release Message-ID: <20200605042029.GL2667@sol.localdomain> References: <0000000000004ae30305a653bc86@google.com> <08f732a9-986f-6dcf-87dd-075a9b4605d7@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <08f732a9-986f-6dcf-87dd-075a9b4605d7@infradead.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, May 23, 2020 at 10:38:50AM -0700, Randy Dunlap wrote: > On 5/23/20 10:04 AM, syzbot wrote: > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit: c11d28ab Add linux-next specific files for 20200522 > > git tree: linux-next > > console output: https://syzkaller.appspot.com/x/log.txt?x=17330172100000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=3f6dbdea4159fb66 > > dashboard link: https://syzkaller.appspot.com/bug?extid=e3c234427cd464510547 > > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=122eacba100000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12fffa9a100000 > > > > The bug was bisected to: > > > > commit 4ef12f7198023c09ad6d25b652bd8748c965c7fa > > Author: Heikki Krogerus > > Date: Wed May 13 15:18:40 2020 +0000 > > > > kobject: Make sure the parent does not get released before its children > > Hi, > > Greg just sent a revert for this patch: > https://lore.kernel.org/lkml/20200523152922.GA224858@kroah.com/ > > so all 3 of these reports should be cleared up soon. Commit was reverted, so invalidating this bug report: #syz invalid