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=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham 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 043F7C43613 for ; Mon, 24 Jun 2019 07:29:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C7FD2208E4 for ; Mon, 24 Jun 2019 07:29:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="DQ2fpU2I" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727956AbfFXH3g (ORCPT ); Mon, 24 Jun 2019 03:29:36 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:37270 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726375AbfFXH3g (ORCPT ); Mon, 24 Jun 2019 03:29:36 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.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:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=uGTfk2MZqnV1h8cqP0BiyMCPA5BgEGZVqlqHVJi8+YY=; b=DQ2fpU2IIQH/C2TzC4LYgFhKw mdanMGxbHMxvKg82o1nlhutLDxbOSBcVrXH7YP55ovmYdTO3UdgrcmJLqunnbQK5w2yGTdmuOgQAt ifxIEV5Tqc6o1xZk20pgN1z71Q7DQYiq441bxpv3eL/Jx0y/FLkaj7xPmTqUBluL4wTV0PkMGxGp0 7YjKZaRYD//7hRPP/gFZgltMqh6w85mp9pKMsS/YRtuB06/RWdbiBf6lSIjommqgCCA552sEGxLEY WbspNerkQKgsbG4cdG6kJDIPYY1nXvJ+1EYEmPSlTKn3+V206+aERgxogS3RzgiSHb3YbGgf1ad4O RBRFiL4og==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=hirez.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1hfJPz-0001Y8-3m; Mon, 24 Jun 2019 07:29:35 +0000 Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 7F34720A021EC; Mon, 24 Jun 2019 09:29:33 +0200 (CEST) Date: Mon, 24 Jun 2019 09:29:33 +0200 From: Peter Zijlstra To: Nicholas Piggin Cc: kernel test robot , linux-kernel@vger.kernel.org Subject: Re: [kernel/isolation] c427534e48: BUG:kernel_NULL_pointer_dereference,address Message-ID: <20190624072933.GO3436@hirez.programming.kicks-ass.net> References: <20190621082027.GS7221@shao2-debian> <1561160086.rsh9p04w45.astroid@bobo.none> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1561160086.rsh9p04w45.astroid@bobo.none> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Jun 22, 2019 at 09:43:42AM +1000, Nicholas Piggin wrote: > kernel test robot's on June 21, 2019 6:20 pm: > > If you fix the issue, kindly add following tag > > Reported-by: kernel test robot > > > > > > [ 0.562433] BUG: kernel NULL pointer dereference, address: 0000000000000000 > > [ 0.562994] #PF: supervisor read access in kernel mode > > [ 0.562994] #PF: error_code(0x0000) - not-present page > > [ 0.562994] PGD 0 P4D 0 > > [ 0.562994] Oops: 0000 [#1] SMP PTI > > [ 0.562994] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.2.0-rc5-00015-gc427534 #1 > > [ 0.562994] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014 > > [ 0.562994] RIP: 0010:housekeeping_verify_smp+0x2b/0x41 > > [ 0.562994] Code: 66 66 66 90 53 83 c8 ff 48 c7 c3 c0 e2 e3 84 48 89 de 89 c7 e8 94 d4 d7 fe 3b 05 22 77 b8 ff 73 13 89 c2 48 8b 0d db eb 28 00 <48> 0f a3 11 73 df 31 c0 5b c3 48 c7 c7 f0 0e 8d 84 e8 1b 84 3e fe > > [ 0.562994] RSP: 0000:ffffabda00327e18 EFLAGS: 00010293 > > [ 0.562994] RAX: 0000000000000000 RBX: ffffffff84e3e2c0 RCX: 0000000000000000 > > [ 0.562994] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff84e3e2c0 > > [ 0.562994] RBP: ffffffff852b7572 R08: 0000000000000044 R09: 0000000000000228 > > [ 0.562994] R10: 0000000000000000 R11: ffff892f4f817e10 R12: ffffffff854a0938 > > [ 0.562994] R13: 0000000000000002 R14: ffffffff852898d9 R15: 0000000000000000 > > [ 0.562994] FS: 0000000000000000(0000) GS:ffff892fa1e00000(0000) knlGS:0000000000000000 > > [ 0.562994] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > [ 0.562994] CR2: 0000000000000000 CR3: 000000001ec0a000 CR4: 00000000000406f0 > > [ 0.562994] Call Trace: > > [ 0.562994] do_one_initcall+0x46/0x214 > > [ 0.562994] kernel_init_freeable+0x1c7/0x272 > > [ 0.562994] ? rest_init+0xd0/0xd0 > > [ 0.562994] kernel_init+0xa/0x110 > > [ 0.562994] ret_from_fork+0x35/0x40 > > [ 0.562994] Modules linked in: > > [ 0.562994] CR2: 0000000000000000 > > [ 0.562994] ---[ end trace 1c0ad476e5b7f021 ]--- > > Oops, housekeeping_verify_smp needs to needs to check > housekeeping_overidden before testing housekeeping_mask. > > You want me to resend with a fix? That'd be great.