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=-6.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 D0382C4363A for ; Mon, 5 Oct 2020 16:30:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 88C952075A for ; Mon, 5 Oct 2020 16:30:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Ozfn8/0s" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728911AbgJEQa1 (ORCPT ); Mon, 5 Oct 2020 12:30:27 -0400 Received: from us-smtp-delivery-124.mimecast.com ([63.128.21.124]:40007 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727006AbgJEQa1 (ORCPT ); Mon, 5 Oct 2020 12:30:27 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1601915426; 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=uq+a3B+bkO2xvEqsx4wXSkU0/eyO48zjxe+68lsMqAc=; b=Ozfn8/0scOP6P224xayJY7056AadcNcDcFB2qzdYIktROnuGJDvb40HVNfocqmcHNhhrLS P6hkaxzKffM5Yk/BzYClWDD5AX7siDasR3/EVtGxAmI5D42e8lqhhnsnmbTNr3hnSXN3HW lJah4IOg+l6bpBPwbhcrZfFx7ARKpUg= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-122-Uczr-nElM5ieY4bm9-r0XQ-1; Mon, 05 Oct 2020 12:30:22 -0400 X-MC-Unique: Uczr-nElM5ieY4bm9-r0XQ-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id ED1CB191F540; Mon, 5 Oct 2020 16:30:20 +0000 (UTC) Received: from dhcp-27-174.brq.redhat.com (unknown [10.40.192.132]) by smtp.corp.redhat.com (Postfix) with SMTP id B29475C1BD; Mon, 5 Oct 2020 16:30:18 +0000 (UTC) Received: by dhcp-27-174.brq.redhat.com (nbSMTP-1.00) for uid 1000 oleg@redhat.com; Mon, 5 Oct 2020 18:30:20 +0200 (CEST) Date: Mon, 5 Oct 2020 18:30:17 +0200 From: Oleg Nesterov To: "Eric W. Biederman" Cc: syzbot , axboe@kernel.dk, christian@brauner.io, linux-kernel@vger.kernel.org, liuzhiqiang26@huawei.com, syzkaller-bugs@googlegroups.com, Tejun Heo Subject: Re: WARNING in get_signal Message-ID: <20201005163016.GB9995@redhat.com> References: <000000000000da06e405b0b20f1e@google.com> <87zh54bp0n.fsf@x220.int.ebiederm.org> <20201005134923.GA9995@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20201005134923.GA9995@redhat.com> User-Agent: Mutt/1.5.24 (2015-08-30) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/05, Oleg Nesterov wrote: > > > It looks like this code was introduced in commit 73ddff2bee15 ("job > > control: introduce JOBCTL_TRAP_STOP and use it for group stop trap"). > > Yes, but I bet this was broken later, _may be_ by 924de3b8c9410c4. No, it seems this bug is really old. I'll try to make the fix tomorrow. Oleg.