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=-18.2 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_IN_DEF_DKIM_WL 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 8EAABC433DB for ; Mon, 1 Feb 2021 08:04:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3C1DC64D73 for ; Mon, 1 Feb 2021 08:04:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232383AbhBAIE3 (ORCPT ); Mon, 1 Feb 2021 03:04:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58318 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232341AbhBAIEY (ORCPT ); Mon, 1 Feb 2021 03:04:24 -0500 Received: from mail-qv1-xf34.google.com (mail-qv1-xf34.google.com [IPv6:2607:f8b0:4864:20::f34]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 98D9AC061574 for ; Mon, 1 Feb 2021 00:03:44 -0800 (PST) Received: by mail-qv1-xf34.google.com with SMTP id u20so3691583qvx.7 for ; Mon, 01 Feb 2021 00:03:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=cXn86J6LQUtvcwGvVgVroC1EKW3nlsBMdzpnDrpbexI=; b=LZEP2FQVaqbuugiD+wkAkDLFkGEe1vcP/5OdiWUwRnNcyZTFDGMJHkIOCdSmf6Hjcp RsroPUwipXmUHOM9hmiGJun7qLXFyjoYj4WZlHIKyLmNyHsGtEf+JM/2A164iUpbvCfR LlqVSvZHPuf+NyaHoKFNXJL2WDW9ahRmAnH0n6AknrabqsHV1khHF4vQo8xZs2D9X3ds 9JCSDJ7mZJJgQTLQUmKd0KSoRh4oQqGpX9/h/ZNNrT94ZuZY/cXFp1u6izoMmGzxPRO5 QJ94jJwWDeXNo0Bw89se0rALGLXBf2wkK/6yBPkyNNgKQvbLlplDzo13eSxShUrlnug4 8MpA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=cXn86J6LQUtvcwGvVgVroC1EKW3nlsBMdzpnDrpbexI=; b=ZYDMGjrjn0VDn7JruOFMWjKYq0V6Re7MDrY7B7o4YoIkugCrt2SPVR7knagRONEnsq erkZKqLpQaSEf40zLDwon+0Ms5jTpyqfFCG9xwDM2epMQ44a7EfrdCUWUK9pVj2S3Tn1 6F8bi/tIqKL4uAHbCWWF/Qj7yvo+XNzEJDmS+2p4RfBbtpLzbm2FJ6ehCG4xkQ6Q2puP Kt3WWK1JSd5a9vh3Ia9Xu72xKkT+H+UjVETT722TMj1Y+oBI3ZPNguWjjWxpQVyyyqYs AfwCtefuzKUFVVHkuAWFnVP7cmDE9YZY7ljA0u8hn9nVVRioR0yg4oLfMnr4YqkS6KGV ii3g== X-Gm-Message-State: AOAM530RCPZVFoNdZ2wa55T74qE+w0OdMkSthZ4lQns/R6h2ykK/DEEQ l8wkALw75D+QwqsprBeJ2SH668d+BvVjWfk7ThiB+w== X-Google-Smtp-Source: ABdhPJwQD44dY6kzIgqv+4vx6DT+iNgIEwfIQL6g4Ii2qq9ht6rpaqYUpv9alyGlgU4XV1SXbr1NG+i6TQk3jlUwWPs= X-Received: by 2002:a0c:8304:: with SMTP id j4mr14500567qva.18.1612166623600; Mon, 01 Feb 2021 00:03:43 -0800 (PST) MIME-Version: 1.0 References: <000000000000d4b96a05aedda7e2@google.com> <00000000000079a40e05ba0d702f@google.com> In-Reply-To: <00000000000079a40e05ba0d702f@google.com> From: Dmitry Vyukov Date: Mon, 1 Feb 2021 09:03:32 +0100 Message-ID: Subject: Re: possible deadlock in send_sigio (2) To: syzbot Cc: Bruce Fields , Boqun Feng , Jeff Layton , linux-fsdevel , LKML , Ingo Molnar , Peter Zijlstra , syzkaller-bugs , Al Viro , Will Deacon Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org On Fri, Jan 29, 2021 at 6:36 PM syzbot wrote: > > syzbot suspects this issue was fixed by commit: > > commit 8d1ddb5e79374fb277985a6b3faa2ed8631c5b4c > Author: Boqun Feng > Date: Thu Nov 5 06:23:51 2020 +0000 > > fcntl: Fix potential deadlock in send_sig{io, urg}() > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17455db4d00000 > start commit: 7b1b868e Merge tag 'for-linus' of git://git.kernel.org/pub.. > git tree: upstream > kernel config: https://syzkaller.appspot.com/x/.config?x=3416bb960d5c705d > dashboard link: https://syzkaller.appspot.com/bug?extid=907b8537e3b0e55151fc > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=163e046b500000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12f8b623500000 > > If the result looks correct, please mark the issue as fixed by replying with: > > #syz fix: fcntl: Fix potential deadlock in send_sig{io, urg}() > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection #syz fix: fcntl: Fix potential deadlock in send_sig{io, urg}()