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 0C6E2C19F28 for ; Wed, 27 Jul 2022 16:00:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234096AbiG0QA1 (ORCPT ); Wed, 27 Jul 2022 12:00:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59772 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233405AbiG0QA0 (ORCPT ); Wed, 27 Jul 2022 12:00:26 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 5941B3E745 for ; Wed, 27 Jul 2022 09:00:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1658937624; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=XNYAzpbrdFeqkLd/QeiydKTf4ZkAUvL844eMUk9c+qI=; b=YMQl+9Q6D7Q/wdxyWyzlRh9PVPpZxiQxR7l68lRtGx9VgVQNpAorrIAr1F/vbqM6k5x4eb Tb9PE45mhXl3iDE6JxyL7d6iKULK4N2ugDeAlXVJIS6FEQKj8tTq5olFLOTtvooYjwVJnO pjhmqpkvDR8T23Pzz+oJ3WKOI5bITX8= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-475-PwZ4nW0tMMyBcYo8tCDBPg-1; Wed, 27 Jul 2022 12:00:20 -0400 X-MC-Unique: PwZ4nW0tMMyBcYo8tCDBPg-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id C9FD43C0CD4C; Wed, 27 Jul 2022 16:00:19 +0000 (UTC) Received: from T590 (ovpn-8-32.pek2.redhat.com [10.72.8.32]) by smtp.corp.redhat.com (Postfix) with ESMTPS id AFDB240CF8E2; Wed, 27 Jul 2022 16:00:12 +0000 (UTC) Date: Thu, 28 Jul 2022 00:00:07 +0800 From: Ming Lei To: syzbot Cc: axboe@kernel.dk, cgroups@vger.kernel.org, fweisbec@gmail.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, tj@kernel.org Subject: Re: [syzbot] INFO: rcu detected stall in net_tx_action Message-ID: References: <00000000000026864605c611cc51@google.com> <0000000000004bee3605e4b74106@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0000000000004bee3605e4b74106@google.com> X-Scanned-By: MIMEDefang 2.84 on 10.11.54.1 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Tue, Jul 26, 2022 at 08:50:09AM -0700, syzbot wrote: > syzbot suspects this issue was fixed by commit: > > 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=1004f05a080000 > start commit: d6765985a42a Revert "be2net: disable bh with spin_lock in .. > git tree: net > kernel config: https://syzkaller.appspot.com/x/.config?x=7ca96a2d153c74b0 > dashboard link: https://syzkaller.appspot.com/bug?extid=3ba0493d523d007b3819 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14c9edc8300000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=172463c8300000 > The bad commit has been fixed by the following patch: d578c770c852 block: avoid calling blkg_free() in atomic context Thanks, Ming