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,URIBL_BLOCKED,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 18FC3C41517 for ; Thu, 15 Aug 2019 07:51:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DA0632133F for ; Thu, 15 Aug 2019 07:51:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1565855515; bh=OcToxkMk9gwSDl2BUebvNxigaLKXvR3X1ectJPWkRLE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:List-ID:From; b=OgGJJq04Es8hvzn/3G9FiFHdfifrAxCmonS5SQyNsGWsg6guig5q4CCp5FUNT/5RX ZXkgUvBiSAxQ8gyUKFTZSyM+jGaN+B3Bxkr1BMCCSGZCoy5Y+AOnMkJi9/ZOz18yWo DG1CYFa3zBnlVKLiNiHVJG3q3ij28P4chdQBNV1M= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730609AbfHOHvv (ORCPT ); Thu, 15 Aug 2019 03:51:51 -0400 Received: from mail.kernel.org ([198.145.29.99]:43132 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726443AbfHOHvu (ORCPT ); Thu, 15 Aug 2019 03:51:50 -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 6F9F92084D; Thu, 15 Aug 2019 07:51:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1565855509; bh=OcToxkMk9gwSDl2BUebvNxigaLKXvR3X1ectJPWkRLE=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=ikYTm+Z+svls9M/L1vwCDEPOjor7PIuUJlBIMrqGDy5t9DD6cJBn+9lPsrRj4k/0A YcWUquzHr2EfuIY9gSs9nyeux6mM5QAff0gLwWAHzYsYRDmxc9IYZ1sVFcTHXC8uDK fRos8pRMya5Flsy5VvWWyluoO24ZWhf9SFNYxVZc= Date: Thu, 15 Aug 2019 08:51:42 +0100 From: Will Deacon To: syzbot , bvanassche@acm.org Cc: akpm@linux-foundation.org, ast@kernel.org, bpf@vger.kernel.org, bvanassche@acm.org, daniel@iogearbox.net, davem@davemloft.net, dvyukov@google.com, hawk@kernel.org, hdanton@sina.com, jakub.kicinski@netronome.com, johannes.berg@intel.com, johannes@sipsolutions.net, john.fastabend@gmail.com, kafai@fb.com, linux-kernel@vger.kernel.org, longman@redhat.com, mingo@kernel.org, netdev@vger.kernel.org, paulmck@linux.vnet.ibm.com, peterz@infradead.org, songliubraving@fb.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, tj@kernel.org, torvalds@linux-foundation.org, will.deacon@arm.com, xdp-newbies@vger.kernel.org, yhs@fb.com Subject: Re: WARNING in is_bpf_text_address Message-ID: <20190815075142.vuza32plqtiuhixx@willie-the-truck> References: <00000000000000ac4f058bd50039@google.com> <000000000000e56cb0058fcc6c28@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000000000000e56cb0058fcc6c28@google.com> User-Agent: NeoMutt/20170113 (1.7.2) Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Hi Bart, On Sat, Aug 10, 2019 at 05:24:06PM -0700, syzbot wrote: > syzbot has found a reproducer for the following crash on: > > HEAD commit: 451577f3 Merge tag 'kbuild-fixes-v5.3-3' of git://git.kern.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=120850a6600000 > kernel config: https://syzkaller.appspot.com/x/.config?x=2031e7d221391b8a > dashboard link: https://syzkaller.appspot.com/bug?extid=bd3bba6ff3fcea7a6ec6 > compiler: clang version 9.0.0 (/home/glider/llvm/clang > 80fee25776c2fb61e74c1ecb1a523375c2500b69) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=130ffe4a600000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17137d2c600000 > > The bug was bisected to: > > commit a0b0fd53e1e67639b303b15939b9c653dbe7a8c4 > Author: Bart Van Assche > Date: Thu Feb 14 23:00:46 2019 +0000 > > locking/lockdep: Free lock classes that are no longer in use > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=152f6a9da00000 > final crash: https://syzkaller.appspot.com/x/report.txt?x=172f6a9da00000 > console output: https://syzkaller.appspot.com/x/log.txt?x=132f6a9da00000 I know you don't think much to these reports, but please could you have a look (even if it's just to declare it a false positive)? Cheers, Will