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 E3A63C54EBE for ; Fri, 13 Jan 2023 16:04:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230133AbjAMQEf (ORCPT ); Fri, 13 Jan 2023 11:04:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53998 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229746AbjAMQEK (ORCPT ); Fri, 13 Jan 2023 11:04:10 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9A39ED115; Fri, 13 Jan 2023 07:53:33 -0800 (PST) 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=VqBqrKHoTF1oEfmV1b5/RHZVp974/h799RFrDq7FowI=; b=alEPbzL6ZHKE0rtbINvVU+EaOJ dr4qmn5NL9AEasyHZ1FOnCoC/dxA2IxxUdLL5EbilZ2F7GBSsXWaGYgonBamLQRSyoG0hvvN5uw9L A7RVK9slnPvcRnGJ6XbP4ngq1WDjgixPw9ZIXPcdbdjNS/VNKy1KYWl/sfkAgNuq0JsOYpflMaNV1 BOz/dCHipEluvT6D7/s+IMaoao0DNQG5HSKd47lh5smzkDWJ6ZmHWfrqFWyplJEuVZny6u/acxV02 CoorxpEE5E3K2dHRR+orNVB2IoBx18OU8CLU8V1mlcj+GRFmSsHYSchYvfePKPCmtqo6MNGc5+FAj TN0emfwQ==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1pGMNE-006Dpp-9t; Fri, 13 Jan 2023 15:53:44 +0000 Date: Fri, 13 Jan 2023 15:53:44 +0000 From: Matthew Wilcox To: Naresh Kamboju Cc: open list , Linux-Next Mailing List , lkft-triage@lists.linaro.org, regressions@lists.linux.dev, Kefeng Wang , Mark Brown , Andrew Morton , Arnd Bergmann , Anders Roxell Subject: Re: next: BUG: kernel NULL pointer dereference, address: 0000000000000008 - RIP: 0010:do_wp_page Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-next@vger.kernel.org On Fri, Jan 13, 2023 at 09:14:15PM +0530, Naresh Kamboju wrote: > Hi Matthew, > > On Fri, 13 Jan 2023 at 19:32, Matthew Wilcox wrote: > > > > On Fri, Jan 13, 2023 at 06:53:01PM +0530, Naresh Kamboju wrote: > > > Linux next tag 20230113 boot failed on x86_64, arm64, arm and i386. > > > > Why are you still not running these stack dumps through > > scripts/decode_stacktrace.sh ? That seems like it's much easier for you > > to do than expecting everybody who might be interested in investigating > > your reports to pull down enough of the build artifacts to make it work. > > Hope this will help you. > > # ./scripts/decode_stacktrace.sh vmlinux < input.txt > output.txt > > stack dumps: > ------------------ > [ 15.945626] BUG: kernel NULL pointer dereference, address: 0000000000000008 > [ 15.952588] #PF: supervisor read access in kernel mode > [ 15.957720] #PF: error_code(0x0000) - not-present page > [ 15.962850] PGD 8000000103213067 P4D 8000000103213067 PUD 103212067 PMD 0 > [ 15.969724] Oops: 0000 [#1] PREEMPT SMP PTI > [ 15.973909] CPU: 3 PID: 1 Comm: init Not tainted 6.2.0-rc3-next-20230113 #1 > [ 15.980869] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS > 2.0b 07/27/2017 > [ 15.988336] RIP: 0010:do_wp_page (memory.c:?) Uh, are you compiling your kernels without debuginfo? The results from syzbot & 0day are much more useful: https://lore.kernel.org/linux-mm/Y8FnAwWOxLrfoWTN@casper.infradead.org/T/#u for an example. > [ 16.087446] Call Trace: > [ 16.089893] > [ 16.091991] ? trace_preempt_off (??:?) > [ 16.096087] ? __handle_mm_fault (memory.c:?) > [ 16.100439] __handle_mm_fault (memory.c:?) > [ 16.104617] handle_mm_fault (??:?) > [ 16.108457] do_user_addr_fault (fault.c:?) > [ 16.112642] exc_page_fault (??:?) > [ 16.116394] asm_exc_page_fault (??:?) > [ 16.120408] RIP: 0033:0x7fe169dbf31e > Call Trace: > > wp_page_copy mm/memory.c:3047 [inline] > do_wp_page+0x749/0x3880 mm/memory.c:3425 > handle_pte_fault mm/memory.c:4937 [inline] > __handle_mm_fault+0x2183/0x3eb0 mm/memory.c:5061 > handle_mm_fault+0x1b6/0x850 mm/memory.c:5207 > do_user_addr_fault+0x475/0x1210 arch/x86/mm/fault.c:1407 > handle_page_fault arch/x86/mm/fault.c:1498 [inline] > exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1554 > asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 > RIP: 0033:0x7f92c0e2df98 See how much more useful that is?