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=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=no 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 B3D85C2BB1D for ; Fri, 17 Apr 2020 21:58:17 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 68A482137B for ; Fri, 17 Apr 2020 21:58:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="RU3FzWsi" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 68A482137B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 1745A8E0003; Fri, 17 Apr 2020 17:58:17 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 125FD8E0001; Fri, 17 Apr 2020 17:58:17 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 061E48E0003; Fri, 17 Apr 2020 17:58:17 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0146.hostedemail.com [216.40.44.146]) by kanga.kvack.org (Postfix) with ESMTP id E42178E0001 for ; Fri, 17 Apr 2020 17:58:16 -0400 (EDT) Received: from smtpin03.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 9BC5B181AEF39 for ; Fri, 17 Apr 2020 21:58:16 +0000 (UTC) X-FDA: 76718710992.03.alarm94_65505eb3d8f16 X-HE-Tag: alarm94_65505eb3d8f16 X-Filterd-Recvd-Size: 6149 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf13.hostedemail.com (Postfix) with ESMTP for ; Fri, 17 Apr 2020 21:58:16 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (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 F07F320B1F; Fri, 17 Apr 2020 21:58:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587160695; bh=INZKVW0ek2rLl2zdbkPufKVWe37AqusyD3oNcrlWZFw=; h=Date:From:To:Subject:In-Reply-To:References:From; b=RU3FzWsi7mfUI9aABDjdnqgJkhEKZNxJv4fauNQjxjkmszZ4BqbYs49tN5Zu/pr8H J8RoSMk7OfcFfBJZd0sV0we5hEUU08I4vQJeCMHD+t+NIfg3dHRNxUs9fguU/yRogs GSS5joi7mIG3jfpAXxV1rSnhJdZu53kKH6hkL92k= Date: Fri, 17 Apr 2020 14:58:13 -0700 From: Andrew Morton To: erhard_f@mailbox.org, bugzilla-daemon@bugzilla.kernel.org, linux-mm@kvack.org, Christian Koenig , Huang Rui , David Airlie , Daniel Vetter , dri-devel@lists.freedesktop.org Subject: Re: [Bug 206697] #PF: supervisor read access in kernel mode, #PF: error_code(0x0000) - not-present page while building a large project Message-Id: <20200417145813.f6b5eb02d0d9efb04df6d699@linux-foundation.org> In-Reply-To: <20200302150329.773bfeb8a1e4bc02b0f06e49@linux-foundation.org> References: <20200302150329.773bfeb8a1e4bc02b0f06e49@linux-foundation.org> X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, 2 Mar 2020 15:03:29 -0800 Andrew Morton wrote: > > (switched to email. Please respond via emailed reply-to-all, not via the > bugzilla web interface). > > On Mon, 02 Mar 2020 21:55:10 +0000 bugzilla-daemon@bugzilla.kernel.org wrote: > > > https://bugzilla.kernel.org/show_bug.cgi?id=206697 > > > > --- Comment #2 from Erhard F. (erhard_f@mailbox.org) --- > > Created attachment 287765 > > --> https://bugzilla.kernel.org/attachment.cgi?id=287765&action=edit > > dmesg (kernel 5.6-rc4, Shuttle XPC FS51, Pentium 4) > > > > Same on kernel 5.6-rc4: > > Thanks. This looks like a regression in the DRM code. I've added > suitable Ccs. Erhard, please let's handle this issue via email, not via the bugzilla interface. This does appear to be a DRM issue, and it has been reproduced in 5.7-rc1. Latest update below: From: bugzilla-daemon@bugzilla.kernel.org To: akpm@linux-foundation.org Subject: [Bug 206697] #PF: supervisor read access in kernel mode, #PF: error_code(0x0000) - not-present page while building a large project Date: Fri, 17 Apr 2020 07:45:23 +0000 https://bugzilla.kernel.org/show_bug.cgi?id=206697 --- Comment #5 from Erhard F. (erhard_f@mailbox.org) --- Looks mostly the same on kernel 5.7-rc1. The line after kthread+0xd1/0xd3 is different. It was "? try_to_free_pages+0x3d4/0x3d4" on 5.5.6 and 5.6-rc4, but is "? shrink_node+0x6f2/0x6f2" on 5.7-rc1 now. [...] Apr 17 00:28:40 BUG: kernel NULL pointer dereference, address: 00000000 Apr 17 00:28:40 #PF: supervisor read access in kernel mode Apr 17 00:28:40 #PF: error_code(0x0000) - not-present page Apr 17 00:28:40 *pde = 00000000 Apr 17 00:28:40 Oops: 0000 [#1] SMP Apr 17 00:28:40 CPU: 0 PID: 53 Comm: kswapd0 Not tainted 5.7.0-rc1-Pentium4 #1 Apr 17 00:28:40 Hardware name: /FS51, BIOS 6.00 PG 12/02/2003 Apr 17 00:28:40 EIP: __cpa_process_fault+0x205/0x226 Apr 17 00:28:40 Code: 2d 00 00 00 40 39 d0 76 1f 81 fa ff ff ff bf 76 17 c7 47 10 01 00 00 00 81 c3 00 00 00 40 c1 eb 0c 89 5f 18 31 f6 eb 19 8b 07 30 53 68 d5 c7 cb d8 e8 cb 68 00 00 0f 0b> Apr 17 00:28:40 EAX: 00000000 EBX: 00000000 ECX: 00000001 EDX: 00000000 Apr 17 00:28:40 ESI: 00000001 EDI: f5e5bd4c EBP: f5e5bcc4 ESP: f5e5bca0 Apr 17 00:28:40 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010213 Apr 17 00:28:40 CR0: 80050033 CR2: 00000000 CR3: 05ab3000 CR4: 000006d0 Apr 17 00:28:40 Call Trace: Apr 17 00:28:40 ? _raw_spin_lock+0x22/0x2a Apr 17 00:28:40 ? lookup_address+0x1d/0x20 Apr 17 00:28:40 __change_page_attr_set_clr+0x85/0x551 Apr 17 00:28:40 ? __mutex_unlock_slowpath+0x20/0x1b6 Apr 17 00:28:40 ? mutex_unlock+0xb/0xd Apr 17 00:28:40 ? _vm_unmap_aliases.part.0+0x11f/0x127 Apr 17 00:28:40 change_page_attr_set_clr+0xdc/0x1af Apr 17 00:28:40 set_pages_array_wb+0x20/0x7b Apr 17 00:28:40 ttm_pages_put+0x22/0x71 [ttm] Apr 17 00:28:40 ttm_page_pool_free+0xa1/0x111 [ttm] Apr 17 00:28:40 ttm_pool_shrink_scan+0x9c/0xd1 [ttm] Apr 17 00:28:40 shrink_slab.constprop.0+0x248/0x38f Apr 17 00:28:40 shrink_node+0x533/0x6f2 Apr 17 00:28:40 kswapd+0x4b6/0x628 Apr 17 00:28:40 ? kswapd+0x4b6/0x628 Apr 17 00:28:40 kthread+0xd1/0xd3 Apr 17 00:28:40 ? shrink_node+0x6f2/0x6f2 Apr 17 00:28:40 ? kthread_delayed_work_timer_fn+0x6a/0x6a Apr 17 00:28:40 ret_from_fork+0x2e/0x38 Apr 17 00:28:40 Modules linked in: fuse auth_rpcgss nfsv4 dns_resolver nfs lockd grace sunrpc rt2500pci eeprom_93cx6 rt2x00pci rt2x00mmio rt2x00lib led_class mac80211 radeon hwmon i2c_algo_bit d> Apr 17 00:28:40 CR2: 0000000000000000 Apr 17 00:28:40 ---[ end trace 49fbdfbb6e459a06 ]--- Apr 17 00:28:40 EIP: __cpa_process_fault+0x205/0x226 Apr 17 00:28:40 Code: 2d 00 00 00 40 39 d0 76 1f 81 fa ff ff ff bf 76 17 c7 47 10 01 00 00 00 81 c3 00 00 00 40 c1 eb 0c 89 5f 18 31 f6 eb 19 8b 07 30 53 68 d5 c7 cb d8 e8 cb 68 00 00 0f 0b> Apr 17 00:28:40 EAX: 00000000 EBX: 00000000 ECX: 00000001 EDX: 00000000 Apr 17 00:28:40 ESI: 00000001 EDI: f5e5bd4c EBP: f5e5bcc4 ESP: f5e5bca0 Apr 17 00:28:40 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010213 Apr 17 00:28:40 CR0: 80050033 CR2: 00000000 CR3: 05ab3000 CR4: 000006d0 -- You are receiving this mail because: You are the assignee for the bug.