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=-7.6 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 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 75F07C433E0 for ; Mon, 8 Jun 2020 07:09:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 335AB2076A for ; Mon, 8 Jun 2020 07:09:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591600184; bh=rjBLjDjW1O9fGRBJf6kjv/K3zXOgcWg6SA2GxlenQUo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=cLBChLZmWPID/y0OzVBaknwBozPjmoDZQVtoag5Vhldp3LkuwCUkaKGuuYoxQ/zUq YZypMBJTEIz/lZd127epFcCkUF64njtVbBKOPRWXZKauF8uUkUXBK19ItHSD8+iDOC VDl3xEcTyxL/+wynTZym0WcSS/uQa1+Y6pWYMkvw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728960AbgFHHJl (ORCPT ); Mon, 8 Jun 2020 03:09:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:33884 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727966AbgFHHJi (ORCPT ); Mon, 8 Jun 2020 03:09:38 -0400 Received: from willie-the-truck (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D92FE204EF; Mon, 8 Jun 2020 07:09:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1591600177; bh=rjBLjDjW1O9fGRBJf6kjv/K3zXOgcWg6SA2GxlenQUo=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=pV7zn0HjBkPTH1rFr/cRU+ZpTXJyYcNmWp+gw0iMmCCAAh/ir+o04fbw3JuqBDR81 Kxp8krRzNTiB2yteIVm77VaSqGr7xthU4h/vQ+OR2nvGkId4m/0itdRo1Obwd69XIi nEbWRIadXESsfCcJN0lTqzbyBCZrbiTu+TysZzRQ= Date: Mon, 8 Jun 2020 08:09:30 +0100 From: Will Deacon To: syzbot Cc: andriin@fb.com, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, dsahern@gmail.com, ebiederm@xmission.com, edumazet@google.com, eric.dumazet@gmail.com, hawk@kernel.org, jiri@mellanox.com, johannes.berg@intel.com, john.fastabend@gmail.com, kafai@fb.com, kpsingh@chromium.org, kuba@kernel.org, leon@kernel.org, linux-kernel@vger.kernel.org, mkubecek@suse.cz, netdev@vger.kernel.org, saiprakash.ranjan@codeaurora.org, songliubraving@fb.com, suzuki.poulose@arm.com, syzkaller-bugs@googlegroups.com, yhs@fb.com Subject: Re: WARNING in dev_change_net_namespace Message-ID: <20200608070930.GA555@willie-the-truck> References: <000000000000c54420059e4f08ff@google.com> <00000000000011eb1705a76ad69d@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <00000000000011eb1705a76ad69d@google.com> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Sat, Jun 06, 2020 at 07:03:03AM -0700, syzbot wrote: > syzbot has bisected this bug to: > > commit 13dc4d836179444f0ca90188cfccd23f9cd9ff05 > Author: Will Deacon > Date: Tue Apr 21 14:29:18 2020 +0000 > > arm64: cpufeature: Remove redundant call to id_aa64pfr0_32bit_el0() > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=109aa3b1100000 > start commit: 7ae77150 Merge tag 'powerpc-5.8-1' of git://git.kernel.org.. > git tree: upstream > final crash: https://syzkaller.appspot.com/x/report.txt?x=129aa3b1100000 > console output: https://syzkaller.appspot.com/x/log.txt?x=149aa3b1100000 > kernel config: https://syzkaller.appspot.com/x/.config?x=be4578b3f1083656 > dashboard link: https://syzkaller.appspot.com/bug?extid=830c6dbfc71edc4f0b8f > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12032832100000 > > Reported-by: syzbot+830c6dbfc71edc4f0b8f@syzkaller.appspotmail.com > Fixes: 13dc4d836179 ("arm64: cpufeature: Remove redundant call to id_aa64pfr0_32bit_el0()") Yeah... I doubt that very much. Will