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 59A0CC07E9D for ; Mon, 26 Sep 2022 08:21:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233443AbiIZIVu (ORCPT ); Mon, 26 Sep 2022 04:21:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50580 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234021AbiIZIVk (ORCPT ); Mon, 26 Sep 2022 04:21:40 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D31641BE9E; Mon, 26 Sep 2022 01:21:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=HP+NBtK01Xvhurj9YwQq7BAK/FHuyCvTkrH6hj5jx/E=; b=JWLVW8/61gZmddQzT9cn8bfyY7 grCdQMS7/7KjdCvd28dtoU2eUymCvC2ldg+62KJ4HMXqf2CngSKPr5nttbTcAyEqi8kD4odTziWRd k+77IdPoTTBXRtpajfsq+xdG2H9P9amQaqVHGBFAbVTd9IoMci33tlGQCxVH1vEfvcXRyNQ5XnjCr CYR89HjdSyva8keWdlDYgJlpCmqVRipO5KZVs9HSMzOH9AfJC67HauG+x2/PF/kd1CO8h9hXMDOSk h2CEw9A0cKcqztQyxNdcl1mtqU5+0bnfyZBrrNWpL5kCeo82LPqiOCo/QiSNC+rGECTWJTQ3ZOE7i 8Xe4w/2g==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1ocjMI-00AGfg-DE; Mon, 26 Sep 2022 08:20:58 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 09DB3300023; Mon, 26 Sep 2022 10:20:52 +0200 (CEST) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id D7BE820E5FD5C; Mon, 26 Sep 2022 10:20:52 +0200 (CEST) Date: Mon, 26 Sep 2022 10:20:52 +0200 From: Peter Zijlstra To: Alexei Starovoitov Cc: Dave Hansen , Linus Torvalds , tech-board@lists.linuxfoundation.org, Song Liu , Kernel Team , Borislav Petkov , brijesh.singh@amd.com, Dan Williams , Dave Hansen , "H. Peter Anvin" , jane.chu@oracle.com, "Kirill A. Shutemov" , LKML , Andy Lutomirski , Ingo Molnar , seanjc@google.com, syzkaller-bugs , Thomas Gleixner , Tom Lendacky , X86 ML , Alexei Starovoitov , Daniel Borkmann , John Fastabend , "open list:BPF (Safe dynamic programs and tools)" Subject: Re: [syzbot] WARNING in __change_page_attr_set_clr Message-ID: References: <00000000000076f3a305e97e9229@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On Sun, Sep 25, 2022 at 02:55:46PM -0700, Alexei Starovoitov wrote: > Steven Rostedt noticed that comment around the middle of August > and told you and Peter about it. He did indeed; and I was thinking he'd told you about it too so you could fix, what is a very juicy security issue, ASAP. > Then Peter added a WARN_ONCE in commit > https://lore.kernel.org/all/YwySW3ROc21hN7g9@hirez.programming.kicks-ass.net/ > to explicitly trigger that known issue. Well, I had sincerely hoped you'd fixed it by now. You just don't let things like that slide. Note how I didn't post that mostly trivial patch in mid August. Giving you ample time to fix up. > Now we're trying to urgently address it with: > https://lore.kernel.org/bpf/20220923211837.3044723-1-song@kernel.org/ Glad to see it being fixed. Thanks!