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=-2.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED, USER_AGENT_MUTT 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 82C58C677FF for ; Thu, 11 Oct 2018 18:05:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3EE862054F for ; Thu, 11 Oct 2018 18:05:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="yo2gBsAE" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3EE862054F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728601AbeJLBeG (ORCPT ); Thu, 11 Oct 2018 21:34:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:44466 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727870AbeJLBeF (ORCPT ); Thu, 11 Oct 2018 21:34:05 -0400 Received: from localhost (unknown [213.57.200.29]) (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 A7BFB204FD; Thu, 11 Oct 2018 18:05:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1539281145; bh=DatiusO4ntQl1KdbLELexIP+IQb2+IEzb2lRHVioznI=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=yo2gBsAEOraovv2MZQeyi+ta/G0RhZ6eY6zOm2ewS7E0bQZZmRLl7RBcbrTn0BCNW EHgdUM+4CU5T6xIB6kwxD4314TClzAAjU6+7SQouHVEKV6mKEByYfsUMTo6lRDqB3l XUlEA/lDwEqyuZ5hbE9b3goBDYKo8ZGZ+kz21fOs= Date: Thu, 11 Oct 2018 21:05:41 +0300 From: Leon Romanovsky To: Dmitry Vyukov Cc: syzbot , dledford@redhat.com, Jason Gunthorpe , swise@opengridcomputing.com, markb@mellanox.com, linux-rdma@vger.kernel.org, Andrew Morton , "Eric W. Biederman" , guro@fb.com, Kees Cook , "Kirill A. Shutemov" , LKML , Andy Lutomirski , Marcos Souza , Michal Hocko , Rik van Riel , syzkaller-bugs , Will Drewry Subject: Re: WARNING: ODEBUG bug in free_task Message-ID: <20181011180541.GF3742@mtr-leonro.mtl.com> References: <00000000000053a2ca0577ceddac@google.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="AhhlLboLdkugWU4S" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --AhhlLboLdkugWU4S Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Wed, Oct 10, 2018 at 02:59:38PM +0200, Dmitry Vyukov wrote: > On Tue, Oct 9, 2018 at 7:14 PM, syzbot > wrote: > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit: ae16eea39a86 Add linux-next specific files for 20181008 > > git tree: linux-next > > console output: https://syzkaller.appspot.com/x/log.txt?x=16a493b9400000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=42525ce985d1a955 > > dashboard link: https://syzkaller.appspot.com/bug?extid=71aff6ea121ffefc280f > > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14567ae6400000 > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14baa25e400000 > > > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > > Reported-by: syzbot+71aff6ea121ffefc280f@syzkaller.appspotmail.com > > This looks the same as: > > #syz dup: WARNING in __put_task_struct (2) > > The reproducer is all RDMA and also some task refcounting bug. > > +RDMA maintainers Thanks, amazing reproducer, I'm looking on it now. --AhhlLboLdkugWU4S Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIcBAEBAgAGBQJbv5D1AAoJEORje4g2clinXSwP/3Zd/LWbjl2qpGicCpInFJJm /qOpJDdBS7br18078JB52ODnHfE8DoHew6tUKIabIYbUsjlU3QSzCMDTLm1GMTyw CTp9dZURJv/DGlmsRbRrIKtwpgX/KPbBPXtz+D1Y/dIAIXkxjrTIgoRFz0VjbEpO FRC4RVGVqYfEDXEYkH3JKtyLXud3DLFzJNpyen4Y9zEPvY/vC5+TteMW397VYb+u NkARS5L9AJ4UB09mJySvZqsS/DFEM6rwvLfi9xxRnpgA7/IGxq1ztzyqTrTp+J0K 3PmGspA9cI4hQESFc/iASyiD6ccqcgY0nEeyNICZuOAa3XqdSEhHo+DR86E6Cmm2 iKf++F11y2aWLKBsOUxTAGrZ21g9V/FxD36wRXfDatlIsJtbNsRsFf3L67zsJO1C wNxKeKTIg/tCqcBXPGIAVzl9/kg0Pm5Je+mPBKQiqhUEU1cqASyiSf+spGP0IRry H0R3hhVlBYiC0cdjuVAmOVpUjbnifxVfkjxDkHT17/Dvl0HqzPEsjLBcMAocMPL1 O9GfRo8ivzHQEQ0qx07F13dCyqc0ZsvTdWvOqmNgEaSx2pWjVLmjS2U8X6Dmg+Qi ADzh0YPH6BcBG1qqzOyNSGYvNweaS0HaJrBdliCkXtPrv/PSFbCz+mnujTPU6cuw f4REEYRO1gqTQGAf00Ai =ml4y -----END PGP SIGNATURE----- --AhhlLboLdkugWU4S--