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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9637DC433F5 for ; Mon, 1 Nov 2021 08:54:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7343761027 for ; Mon, 1 Nov 2021 08:54:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231485AbhKAI4r (ORCPT ); Mon, 1 Nov 2021 04:56:47 -0400 Received: from mail-il1-f197.google.com ([209.85.166.197]:49738 "EHLO mail-il1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230520AbhKAI4p (ORCPT ); Mon, 1 Nov 2021 04:56:45 -0400 Received: by mail-il1-f197.google.com with SMTP id e10-20020a92194a000000b00258acd999afso9633208ilm.16 for ; Mon, 01 Nov 2021 01:54:12 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:date:in-reply-to:message-id:subject :from:to; bh=caNXgt7Kc1qn8nnLpDYnPHU93otN4N3yrFwscbLo5q0=; b=VYvknEME7araRHGT6sgzIB0iMRejKunSNK1wzUNvanbI3RdGt/Y3c1m4FKLDzvwQdF jiN8GROH19A8CTCs3PJrYmNfP1G16D1xbb3fDyPF89hsSe/pC+JlWrcoX8vGxEJlJdOk UgO8JG6Qurmo2ip4B3/I6fl5lj+8ZNAHuDiWrlRX7eyuTZ1aC6gdpYe90xPpK4tRCLGq E01+FqNJHfOei0xpIypHbUgCY8YCLm3SPsgx+LTmZH7xF/NmyOD/l5auFCtXBskH6ol+ dQEvAWDIBkJLKZ2/Q9O+YtZVUj6xhgCuQgTrG5SyY+rMTNZWxEw+gfwjdQMIj7aPpzP+ gaTw== X-Gm-Message-State: AOAM533VtEQNyj4Otw1xVBv1nYt5aqQCc7JiU7k2a5A3oidhZzHItWy+ 00dYO14acuwWrvr1GUvCU9k/qQ2xyqAof7+7XNH8+EMyYtWz X-Google-Smtp-Source: ABdhPJwJnLVFdxIsT5DFIZuJgKYh0xI/0gCd9f3p4kkpCj491wpUEzR0T1McGTLEQHmLtIs8Y3m3f0kfi6SO7QW5O+MmpP4JGKC+ MIME-Version: 1.0 X-Received: by 2002:a6b:f614:: with SMTP id n20mr20187633ioh.134.1635756852197; Mon, 01 Nov 2021 01:54:12 -0700 (PDT) Date: Mon, 01 Nov 2021 01:54:12 -0700 In-Reply-To: <000000000000b4786c05cfa94612@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000001d3d6905cfb652d5@google.com> Subject: Re: [syzbot] INFO: rcu detected stall in snd_seq_write (2) From: syzbot To: akpm@linux-foundation.org, bigeasy@linutronix.de, fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, peterz@infradead.org, pmladek@suse.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, valentin.schneider@arm.com 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 1a7243ca4074beed97b68d7235a6e34862fc2cd6 Author: Sebastian Andrzej Siewior Date: Tue Nov 10 11:38:47 2020 +0000 kthread: Move prio/affinite change into the newly created thread bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10b30e6ab00000 start commit: bdcc9f6a5682 Add linux-next specific files for 20211029 git tree: linux-next final oops: https://syzkaller.appspot.com/x/report.txt?x=12b30e6ab00000 console output: https://syzkaller.appspot.com/x/log.txt?x=14b30e6ab00000 kernel config: https://syzkaller.appspot.com/x/.config?x=4b504bcb4c507265 dashboard link: https://syzkaller.appspot.com/bug?extid=bb950e68b400ab4f65f8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16e913bab00000 Reported-by: syzbot+bb950e68b400ab4f65f8@syzkaller.appspotmail.com Fixes: 1a7243ca4074 ("kthread: Move prio/affinite change into the newly created thread") For information about bisection process see: https://goo.gl/tpsmEJ#bisection