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=-5.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS 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 8E204C2D0EC for ; Tue, 7 Apr 2020 21:48:14 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 45ED620748 for ; Tue, 7 Apr 2020 21:48:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 45ED620748 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C8BF98E0019; Tue, 7 Apr 2020 17:48:13 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id C3B768E0001; Tue, 7 Apr 2020 17:48:13 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B02808E0019; Tue, 7 Apr 2020 17:48:13 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0133.hostedemail.com [216.40.44.133]) by kanga.kvack.org (Postfix) with ESMTP id 985AA8E0001 for ; Tue, 7 Apr 2020 17:48:13 -0400 (EDT) Received: from smtpin25.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 4E76EA773 for ; Tue, 7 Apr 2020 21:48:13 +0000 (UTC) X-FDA: 76682397666.25.blood30_d892029a2d48 X-HE-Tag: blood30_d892029a2d48 X-Filterd-Recvd-Size: 7763 Received: from mail-io1-f72.google.com (mail-io1-f72.google.com [209.85.166.72]) by imf40.hostedemail.com (Postfix) with ESMTP for ; Tue, 7 Apr 2020 21:48:12 +0000 (UTC) Received: by mail-io1-f72.google.com with SMTP id v13so4361350iox.6 for ; Tue, 07 Apr 2020 14:48:12 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=NnS8vCZT1QvIiL3CCvnp1oqlk6d3Wrv2CkF9MiyL0vg=; b=uLBPqZGv3Tcq+eg8/1Tmm6VsBxaHBYId/fOURkq5jtKkjwTbQCGvM4IH4YlhQSRIRD a4xMfdyxy9yZkjV4r1EJlrXU8SfBxs+3jbXTetxRjD+ZpquepGJKarwXGNRKzTSdAZhX Ro+uerxzzB81Q4Kt+Lpk7u8hAbQhSLJS8aDUp4rRvdQGi1GEBpmgZE25oGGCEP5eMCZp fSPhGTz+wMw2YC6nhaCzd5WCLhH7bM5kB0vWA8OktYr5CxZu0SbMlVIsmuMkFxmlX4l9 zTn3B5sLKdUttA+ipL7w4igdMKY6gmhPfyxWK56Djrr3GV3OzzsM3cjLdyeowwtvQDno sMpA== X-Gm-Message-State: AGi0PuaSpY7iyXkCSlS8wgYEsmgZuPUMHKYT0BcciC/8RF2xeSFpAX4h WbA+iAalR94DW83fUWbLjfaEbo3QcRDQiyTZIkunhqKAvwCj X-Google-Smtp-Source: APiQypJNFg1DUL3yZpa64aMYloyhiUN/HLSUqpyctBn7oP1PgCl8VW6rAztTPmwjuG1UQu5QLhAGvHI248qEj5+BKurxbq8BBcrH MIME-Version: 1.0 X-Received: by 2002:a5e:8515:: with SMTP id i21mr3943816ioj.96.1586296092402; Tue, 07 Apr 2020 14:48:12 -0700 (PDT) Date: Tue, 07 Apr 2020 14:48:12 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000018a92305a2ba57e0@google.com> Subject: BUG: unable to handle kernel paging request in get_pfnblock_flags_mask From: syzbot To: akpm@linux-foundation.org, bgeffon@google.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, peterx@redhat.com, syzkaller-bugs@googlegroups.com, torvalds@linux-foundation.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, syzbot found the following crash on: HEAD commit: bef7b2a7 Merge tag 'devicetree-for-5.7' of git://git.kerne.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1685901be00000 kernel config: https://syzkaller.appspot.com/x/.config?x=91b674b8f0368e69 dashboard link: https://syzkaller.appspot.com/bug?extid=18638e81a805a2d96682 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11379efbe00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10172c5de00000 The bug was bisected to: commit 4426e945df588f2878affddf88a51259200f7e29 Author: Peter Xu Date: Thu Apr 2 04:08:49 2020 +0000 mm/gup: allow VM_FAULT_RETRY for multiple times bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=16122ac7e00000 final crash: https://syzkaller.appspot.com/x/report.txt?x=15122ac7e00000 console output: https://syzkaller.appspot.com/x/log.txt?x=11122ac7e00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+18638e81a805a2d96682@syzkaller.appspotmail.com Fixes: 4426e945df58 ("mm/gup: allow VM_FAULT_RETRY for multiple times") BUG: unable to handle page fault for address: fffff11043f9c809 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 7170 Comm: syz-executor720 Not tainted 5.6.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__nr_to_section include/linux/mmzone.h:1256 [inline] RIP: 0010:__pfn_to_section include/linux/mmzone.h:1335 [inline] RIP: 0010:get_pageblock_bitmap mm/page_alloc.c:452 [inline] RIP: 0010:__get_pfnblock_flags_mask mm/page_alloc.c:487 [inline] RIP: 0010:get_pfnblock_flags_mask+0x5b/0x190 mm/page_alloc.c:501 Code: 0d ea e0 be 0a 48 85 c9 0f 84 aa 00 00 00 48 89 f7 48 c1 ef 16 48 8d 2c f9 48 b9 00 00 00 00 00 fc ff df 49 89 e8 49 c1 e8 03 <41> 80 3c 08 00 0f 85 87 00 00 00 48 8b 7d 00 48 85 ff 74 7a 83 e3 RSP: 0000:ffffc90001697d40 EFLAGS: 00010a06 RAX: 0000000000000007 RBX: 0001fffffcf404f2 RCX: dffffc0000000000 RDX: 0000000000000002 RSI: fffffe7a02793d05 RDI: 000003fffff9e809 RBP: ffffa8821fce4048 R08: 1ffff51043f9c809 R09: ffffed1013c9e829 R10: ffff88809e4f4147 R11: ffffed1013c9e828 R12: ffff88809e4f4140 R13: ffff88809e4f4148 R14: 0000000000000000 R15: ffff88809e4f4140 FS: 000000000268a940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff11043f9c809 CR3: 000000009f94c000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __dump_page+0x122/0x1a40 mm/debug.c:57 put_page_testzero include/linux/mm.h:675 [inline] put_page include/linux/mm.h:1136 [inline] lookup_node mm/mempolicy.c:907 [inline] do_get_mempolicy mm/mempolicy.c:970 [inline] kernel_get_mempolicy+0xe3f/0xfb0 mm/mempolicy.c:1615 __do_sys_get_mempolicy mm/mempolicy.c:1633 [inline] __se_sys_get_mempolicy mm/mempolicy.c:1629 [inline] __x64_sys_get_mempolicy+0xba/0x150 mm/mempolicy.c:1629 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x441789 Code: e8 ac e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffe6d5ec848 EFLAGS: 00000246 ORIG_RAX: 00000000000000ef RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441789 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000021c9b R08: 0000000000000003 R09: 0000000000402590 R10: 000000002073b000 R11: 0000000000000246 R12: 0000000000402500 R13: 0000000000402590 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: CR2: fffff11043f9c809 ---[ end trace bdfbd15c6d2a525e ]--- RIP: 0010:__nr_to_section include/linux/mmzone.h:1256 [inline] RIP: 0010:__pfn_to_section include/linux/mmzone.h:1335 [inline] RIP: 0010:get_pageblock_bitmap mm/page_alloc.c:452 [inline] RIP: 0010:__get_pfnblock_flags_mask mm/page_alloc.c:487 [inline] RIP: 0010:get_pfnblock_flags_mask+0x5b/0x190 mm/page_alloc.c:501 Code: 0d ea e0 be 0a 48 85 c9 0f 84 aa 00 00 00 48 89 f7 48 c1 ef 16 48 8d 2c f9 48 b9 00 00 00 00 00 fc ff df 49 89 e8 49 c1 e8 03 <41> 80 3c 08 00 0f 85 87 00 00 00 48 8b 7d 00 48 85 ff 74 7a 83 e3 RSP: 0000:ffffc90001697d40 EFLAGS: 00010a06 RAX: 0000000000000007 RBX: 0001fffffcf404f2 RCX: dffffc0000000000 RDX: 0000000000000002 RSI: fffffe7a02793d05 RDI: 000003fffff9e809 RBP: ffffa8821fce4048 R08: 1ffff51043f9c809 R09: ffffed1013c9e829 R10: ffff88809e4f4147 R11: ffffed1013c9e828 R12: ffff88809e4f4140 R13: ffff88809e4f4148 R14: 0000000000000000 R15: ffff88809e4f4140 FS: 000000000268a940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffff11043f9c809 CR3: 000000009f94c000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches