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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD2C7C04A68 for ; Sat, 30 Jul 2022 03:25:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239896AbiG3DZU (ORCPT ); Fri, 29 Jul 2022 23:25:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56244 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239608AbiG3DZM (ORCPT ); Fri, 29 Jul 2022 23:25:12 -0400 Received: from mail-il1-f197.google.com (mail-il1-f197.google.com [209.85.166.197]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 53C89B69 for ; Fri, 29 Jul 2022 20:25:09 -0700 (PDT) Received: by mail-il1-f197.google.com with SMTP id g8-20020a92cda8000000b002dcbd57f808so3811356ild.4 for ; Fri, 29 Jul 2022 20:25:09 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc; bh=Le6CaLI6B5guGWuq3Gyd/hvNCiyTuMEnCMic+ruQwAg=; b=cPtvctLHFn1ktf33LCzlj11dEbqoOkKxvdNg+/7I/sttX4I1YeNjGjEw+1eR/Ee+SM 8pVDD3LvkVYCBVR9pAuGnCtpYhm1QJ8WyPzbpqt+RfH0GgS6DrZU6hniE4OhpFURV6dH otNpvbj/kiHaBj08drimf0Fukx0Dq+5mxfXwY8Yr9mR8nFy7f1MeMbQuxjEorwQDWeLn ZI+BSWz+ozj8gVcUYqC2UKEpTY7LwuHoSN7Lf3obt2wVcfdMQQxpZFnYH3VuuanhUsSb ZfRXysP87oLJjod/2sV45VWwvJUzY8JYmL/rwm32n3mqIz+pZF8+J5oTml1r+CbHUW2c jdnQ== X-Gm-Message-State: AJIora/SO0uXhE5dAcRksM2yE/85tWlOWudNjPfFwV2dhGP6lh7S1SFy eatPSs34MSnU6Dr0uAAxRTk3W8OJk8jbCRw9YjQ4GesTzxw1 X-Google-Smtp-Source: AGRyM1uZmbuimnvUNNN7eYgZxebUEc8abU1NLOXrLNTLjgqi426QKsMvgCMdvZuw8bnYIkGGZLa27J5FmS+eqomTrhDSEVcJwthc MIME-Version: 1.0 X-Received: by 2002:a92:c884:0:b0:2dc:bd44:84bf with SMTP id w4-20020a92c884000000b002dcbd4484bfmr2389723ilo.86.1659151508737; Fri, 29 Jul 2022 20:25:08 -0700 (PDT) Date: Fri, 29 Jul 2022 20:25:08 -0700 In-Reply-To: <000000000000921fd405db62096a@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000004e96a405e4fd5051@google.com> Subject: Re: [syzbot] possible deadlock in throtl_pending_timer_fn From: syzbot To: axboe@kernel.dk, cgroups@vger.kernel.org, hdanton@sina.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, ming.lei@redhat.com, syzkaller-bugs@googlegroups.com, tj@kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org syzbot has bisected this issue to: commit 0a9a25ca78437b39e691bcc3dc8240455b803d8d Author: Ming Lei Date: Fri Mar 18 13:01:43 2022 +0000 block: let blkcg_gq grab request queue's refcnt bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16c3cfc2080000 start commit: cb71b93c2dc3 Add linux-next specific files for 20220628 git tree: linux-next final oops: https://syzkaller.appspot.com/x/report.txt?x=15c3cfc2080000 console output: https://syzkaller.appspot.com/x/log.txt?x=11c3cfc2080000 kernel config: https://syzkaller.appspot.com/x/.config?x=badbc1adb2d582eb dashboard link: https://syzkaller.appspot.com/bug?extid=934ebb67352c8a490bf3 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17713dee080000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15d24952080000 Reported-by: syzbot+934ebb67352c8a490bf3@syzkaller.appspotmail.com Fixes: 0a9a25ca7843 ("block: let blkcg_gq grab request queue's refcnt") For information about bisection process see: https://goo.gl/tpsmEJ#bisection