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=-0.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 9F206C11D00 for ; Thu, 20 Feb 2020 23:56:57 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 50F3820882 for ; Thu, 20 Feb 2020 23:56:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="ej/cXKkg" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 50F3820882 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 02F626B0007; Thu, 20 Feb 2020 18:56:57 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id F22226B0008; Thu, 20 Feb 2020 18:56:56 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E388F6B000A; Thu, 20 Feb 2020 18:56:56 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0018.hostedemail.com [216.40.44.18]) by kanga.kvack.org (Postfix) with ESMTP id C9D7D6B0007 for ; Thu, 20 Feb 2020 18:56:56 -0500 (EST) Received: from smtpin15.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 80452181AEF3E for ; Thu, 20 Feb 2020 23:56:56 +0000 (UTC) X-FDA: 76512168432.15.power11_254e6e474727 X-HE-Tag: power11_254e6e474727 X-Filterd-Recvd-Size: 7639 Received: from mail-wm1-f66.google.com (mail-wm1-f66.google.com [209.85.128.66]) by imf02.hostedemail.com (Postfix) with ESMTP for ; Thu, 20 Feb 2020 23:56:55 +0000 (UTC) Received: by mail-wm1-f66.google.com with SMTP id s10so375753wmh.3 for ; Thu, 20 Feb 2020 15:56:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=vWpDPkwyahB1ZAio4kMFVNRzRmSCXBwGvFFpj6BMit8=; b=ej/cXKkg0pE+BwVuun8p/oLdlULqMO4ETPcVL5GRX77eabWr7KVo3v2IliCnrEb3lj 6eLnWqxe9v/7obAXf19VVi5rDvQFqd2RG0GnU8758rz+j6ZoXLAHz8yEOstSvELwa7vR QWA1nJlchM6SDOz/xtYURB3we5Wp22u0MWpOElwJrXwT/pXZxIFz7/1fe9yVG+XKjQpP J4XfiIp3990bJZhZVNMWXu0o8R7+ELUIhk9RZ5k+uUavT3H/4/x4RzyE930cq8UVN5BT Xkmu6AC3qdeMqc+2HQWCNweBynB5JLf+9lv9myFczs2b88Yf+1S7gCUgVAki9OnUhvtr WZ2A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=vWpDPkwyahB1ZAio4kMFVNRzRmSCXBwGvFFpj6BMit8=; b=mTTYSZbe+Y5SdCcDa0AYu+yOeq6yR6Y0BBAQtXlpmA3VpbLMRICAw/Di+GQOtnx3Ol r5G2DrtMSkk6YSW1OaSj1/wVve05d+dNQK839oegNC19P/bcwH7F2nDL2u0PqGpsMsde 5CdGRhK5WTpTmEyaL3OQGz8O7ilqjcwViAhaoY1YYT2RuowhXG+BB02HNE3EeTMoIvSH hx/QVWXA60bTo7j1+Eov7BcT2wXOjARYAoFLaJRqbnl1BnmuhAJ8qpub1d0rgwjwOu1m NOSI96M2KPf4WTLdtVpE8Ck/6MIC8QZrEO4vQ3KbTsvqVR/3u8gXg7OFbk9Ej1wmtp3s G/VA== X-Gm-Message-State: APjAAAVjby11ICeX/C6Nlk1OYenKgDuaVgyCIIDpUPB/NdGm8qpLgZk3 8YzVkdOagXMxosV8pXhC8ElOO2IItlJMRDiG/hc= X-Google-Smtp-Source: APXvYqy3wXYyqEkoZiTakHMMEw+PtPLaAe2ptTYDVqXJnQkWlfvFfR25b98z0eL1fnMywaD3tF1IoxkApZYVHBZphgw= X-Received: by 2002:a1c:7717:: with SMTP id t23mr7321272wmi.17.1582243014590; Thu, 20 Feb 2020 15:56:54 -0800 (PST) MIME-Version: 1.0 References: <20200219144635.3b7417145de19b65f258c943@linux-foundation.org> <20200220002520.GT24185@bombadil.infradead.org> In-Reply-To: <20200220002520.GT24185@bombadil.infradead.org> From: Denis Lisov Date: Fri, 21 Feb 2020 02:56:43 +0300 Message-ID: Subject: Re: [Bug 206569] BUG at mm/filemap.c:2529: VM_BUG_ON_PAGE(page_to_pgoff(page) != offset) To: Matthew Wilcox Cc: Andrew Morton , Song Liu , bugzilla-daemon@bugzilla.kernel.org, linux-mm@kvack.org Content-Type: text/plain; charset="UTF-8" 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: Hello, First, I've tried to limit changes between a working build and a broken one. The current findings are that: CONFIG_KSM does not matter (the bug reproduces even without it) Both CONFIG_READ_ONLY_THP_FOR_FS and CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS are needed to reproduce the bug (or at least I haven't managed to reproduce it with any of them disabled so far). On Thu, Feb 20, 2020 at 3:25 AM Matthew Wilcox wrote: > This is a compound page ... Dennis, are you willing to apply this patch > https://lore.kernel.org/linux-mm/20200211001536.1027652-12-jhubbard@nvidia.com/ > and retest? It will give us more information about what's going on. Here's the new log. The patch was applied to 5.5.4 manually as it did not apply automatically. page:ffffd52adae60180 refcount:522 mapcount:0 mapping:00000000b5351a5d index:0x406 head:ffffd52adae60000 order:9 compound_mapcount:0 ext4_da_aops name:"cc1plus" flags: 0x8000000000000000() raw: 8000000000000000 ffffd52adae60001 dead000000000122 dead000000000400 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 head: 8000000000010095 ffffd52ade75e848 ffff93b3c624f020 ffff93b387d7daf0 head: 0000000000000400 0000000000000000 0000020affffffff ffff93b3bff56000 page dumped because: VM_BUG_ON_PAGE(page_to_pgoff(page) != offset) ------------[ cut here ]------------ kernel BUG at mm/filemap.c:2529! invalid opcode: 0000 [#1] PREEMPT SMP PTI CPU: 0 PID: 33773 Comm: cc1plus Not tainted 5.5.4-r1-bughunt #5 Hardware name: Gigabyte Technology Co., Ltd. Z97M-D3H/Z97M-D3H, BIOS F5 05/30/2014 RIP: 0010:filemap_fault+0x82e/0x9f0 Code: 47 20 f7 c2 00 00 01 00 0f 84 d2 f8 ff ff 41 0f b6 4f 51 48 d3 e0 e9 c5 f8 ff ff 48 c7 c6 a0 15 35 98 4c 89 ff e8 52 14 03 00 <0f> 0b 45 31 ed e9 58 f8 ff ff 49 8b 57 08 48 8d 42 ff 83 e2 01 49 RSP: 0000:ffff9d3b8c163cf8 EFLAGS: 00010286 RAX: 0000000000000042 RBX: ffff9d3b8c163e28 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000ffffffff RBP: 0000000000000206 R08: 00000000000003b1 R09: 0000000000000004 R10: 0000000000000000 R11: 0000000000000001 R12: ffff93b387d7daf0 R13: ffff93b36fcaf200 R14: ffff93b387d7d980 R15: ffffd52adae60180 FS: 00007feb915e4ac0(0000) GS:ffff93b3cfe00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000809350 CR3: 00000007ac748003 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ? preempt_count_add+0x63/0x90 ? _raw_spin_lock+0xe/0x30 ? alloc_set_pte+0x4c6/0x7b0 ? call_function_single_interrupt+0xa/0x20 ? filemap_map_pages+0x298/0x3b0 ext4_filemap_fault+0x28/0x3a __do_fault+0x33/0xb0 __handle_mm_fault+0xda9/0x13e0 ? _raw_spin_unlock_irq+0x9/0x20 handle_mm_fault+0xb3/0x1e0 do_user_addr_fault+0x1de/0x440 page_fault+0x2f/0x40 RIP: 0033:0x606c20 Code: Bad RIP value. RSP: 002b:00007fff7a679d98 EFLAGS: 00010283 RAX: 000000000000000a RBX: 00007feb8e462540 RCX: 0000000000000001 RDX: 00007feb8e462540 RSI: 0000000006864625 RDI: 0000000000000000 RBP: 00007feb90cc4da8 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffef05 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000006864625 Modules linked in: x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass iTCO_wdt iTCO_vendor_support ppdev crct10dif_pclmul crc32c_intel ghash_clmulni_intel snd_hda_codec_realtek snd_hda_codec_generic pcspkr snd_hda_codec_hdmi i2c_i801 radeon snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hda_core r8169 snd_pcm ttm realtek snd_timer mei_me snd mei soundcore lpc_ich mfd_core parport_pc parport acpi_pad sch_fq_codel efivarfs ---[ end trace 33b86223ecc3d3ab ]--- RIP: 0010:filemap_fault+0x82e/0x9f0 Code: 47 20 f7 c2 00 00 01 00 0f 84 d2 f8 ff ff 41 0f b6 4f 51 48 d3 e0 e9 c5 f8 ff ff 48 c7 c6 a0 15 35 98 4c 89 ff e8 52 14 03 00 <0f> 0b 45 31 ed e9 58 f8 ff ff 49 8b 57 08 48 8d 42 ff 83 e2 01 49 RSP: 0000:ffff9d3b8c163cf8 EFLAGS: 00010286 RAX: 0000000000000042 RBX: ffff9d3b8c163e28 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000ffffffff RBP: 0000000000000206 R08: 00000000000003b1 R09: 0000000000000004 R10: 0000000000000000 R11: 0000000000000001 R12: ffff93b387d7daf0 R13: ffff93b36fcaf200 R14: ffff93b387d7d980 R15: ffffd52adae60180 FS: 00007feb915e4ac0(0000) GS:ffff93b3cfe00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000606bf6 CR3: 00000007ac748003 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400