From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp.codeaurora.org by pdx-caf-mail.web.codeaurora.org (Dovecot) with LMTP id GjCcH4U2Glv2cAAAmS7hNA ; Fri, 08 Jun 2018 07:55:49 +0000 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 62E16607DC; Fri, 8 Jun 2018 07:55:49 +0000 (UTC) Authentication-Results: smtp.codeaurora.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="mUC8tB+b" X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FROM,MAILING_LIST_MULTI autolearn=ham autolearn_force=no version=3.4.0 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by smtp.codeaurora.org (Postfix) with ESMTP id CAD14606FA; Fri, 8 Jun 2018 07:55:48 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org CAD14606FA Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752878AbeFHHzq (ORCPT + 25 others); Fri, 8 Jun 2018 03:55:46 -0400 Received: from mail-pl0-f66.google.com ([209.85.160.66]:32786 "EHLO mail-pl0-f66.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752777AbeFHHzp (ORCPT ); Fri, 8 Jun 2018 03:55:45 -0400 Received: by mail-pl0-f66.google.com with SMTP id n10-v6so7827423plp.0 for ; Fri, 08 Jun 2018 00:55:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=QVzFZrRKb+uhDd7YhSdzOOvtZOCyeMAD8IHWwk27HX0=; b=mUC8tB+bAEtwCCXXduoBxGdhmr9vHfw9AwmeP2Q0JFPWhe1XX6OGS1c5FYGvFhH0BU zB4VpDOQ3MRnfeCjoslCvV2WN1YNWi/eAUUefoFk9tksg4IAlZon46krXKS43Cz0PwpL nMWnE18A4BJfC9Tcn7ZSEHkKVcRuccspWSUjisikdH+LVWBdBSCSGPOdvzjMAvJoILt2 hfmlMV6EJiFovzOtxbRQdHGhkDsvdnfS3he+GFvYFkYRnnYm0FBc6jxzCElIEjABYn04 jXEnMaZlKcxZQ7hOEa7poiAtpiHzKS43CizkdOfhIWadXltxCVklz75pjTZLyaqpvdNt fuNg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=QVzFZrRKb+uhDd7YhSdzOOvtZOCyeMAD8IHWwk27HX0=; b=D4oMaGBVoimTQWxjitLjDunxYXj+QoC32E8tFc8G2nJN/e4Z780zkmqVaZTBIvIN0a Ip0Nic2wzJcKQLIKMxCp6NsgbCeoQIBeqNJcHdwf77kCBL2Usulbc9H/+EYL+KzXBvER e7IHDl8WvgT5OEb/UY5veifhZcRdkRW2qpne+0wVDbdx0slcrwv1Fs/sgphy8on3gfDP BunGN6uR1xW7pH3ulN1g54Anxk7j+rfNbQZjOjFPar3eldMqBxOfX+QkZbZk9dOCtLej oIrsfHVN3kL9uZOHBf7Mj652AAPl0S5SZIYlSI33q7U7Z6tpPR8iF6d3ZGUUYxYo8GU1 k+Hg== X-Gm-Message-State: APt69E3YUZUJoxhj7hCXy5Tmy0YzgwqSQys2lBJ2JUjksCQE0yhtCEfO ip0kNoTvthnH7REBB3ZPVUQ= X-Google-Smtp-Source: ADUXVKIOY4AJqK0lr4ECbxQnVKhz2M9PJueTHUGmQdcqnfkn/2VxPgHxGMpPStWQYaG39VljFtwVZA== X-Received: by 2002:a17:902:6903:: with SMTP id j3-v6mr5503810plk.313.1528444545313; Fri, 08 Jun 2018 00:55:45 -0700 (PDT) Received: from localhost ([175.223.35.248]) by smtp.gmail.com with ESMTPSA id m83-v6sm46863291pfi.188.2018.06.08.00.55.43 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 08 Jun 2018 00:55:44 -0700 (PDT) Date: Fri, 8 Jun 2018 16:55:40 +0900 From: Sergey Senozhatsky To: Dmitry Vyukov Cc: syzbot , LKML , Petr Mladek , Steven Rostedt , Sergey Senozhatsky , syzkaller-bugs Subject: Re: possible deadlock in vprintk_emit Message-ID: <20180608075540.GA636@jagdpanzerIV> References: <000000000000d557e7056e1c7a01@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.0 (2018-05-17) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On (06/08/18 09:50), Dmitry Vyukov wrote: > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit: 1c8c5a9d38f6 Merge git://git.kernel.org/pub/scm/linux/kern.. > > git tree: upstream > > console output: https://syzkaller.appspot.com/x/log.txt?x=131d4ddf800000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=4f1acdf888c9d4e9 > > dashboard link: https://syzkaller.appspot.com/bug?extid=831ee52a258e90882b4d > > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > > > > Unfortunately, I don't have any reproducer for this crash yet. > > > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > > Reported-by: syzbot+831ee52a258e90882b4d@syzkaller.appspotmail.com > > > This is the same as that one, right? Yes. -ss