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=-0.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,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 3E82BC43387 for ; Mon, 31 Dec 2018 07:05:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EE31E2133F for ; Mon, 31 Dec 2018 07:05:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727024AbeLaHFE (ORCPT ); Mon, 31 Dec 2018 02:05:04 -0500 Received: from mail-io1-f69.google.com ([209.85.166.69]:35950 "EHLO mail-io1-f69.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726228AbeLaHFD (ORCPT ); Mon, 31 Dec 2018 02:05:03 -0500 Received: by mail-io1-f69.google.com with SMTP id t13so25964649ioi.3 for ; Sun, 30 Dec 2018 23:05:03 -0800 (PST) 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=k2Ww8s/iPBwFApa69aq1avFcBXQpI3yJdW7nEeOlABs=; b=KiIquOUmPakxXAhwUl+w6p8Yk2Xbi13Jd0o537E/Wt7aFtmm2BHBmf+fsg27FXnxoJ cQ8jMBDN3kkouBg2PuPwKGEngetGXNrBx4nmR8iiQiHHZqU4A7/sVvv5SqvY46xJzs+V Qtt046H6vTBd7Z8Jll2TanQyY24NB2vPPF4h/MlAlMpP4b7x9T0imYnVHGMIigqL/o70 klMqGAN9QMADpqlODBUASMv8MZGavKqSWtbp3BoGF7ResGTiNhbm+38bkBk7M8n8TZr/ TPGv2LteZa8Eg8FvzYwLxywkOHgxpCGKy+TqLllNSQsgUxj+B0vTU+PCAqQDM1fWDd0o yT9w== X-Gm-Message-State: AA+aEWaWqIoLe+gZ3Q97dk9DSTwrJcT0A5yZtv4iJzSLK1KCGtk5bDQL uAoYe0+afYGJN+lJcIDjK11g+wWYKvcskj7LChihPecXGChp X-Google-Smtp-Source: AFSGD/VmxvjbsimznQpxn+M9og2XpOgUoOfNHGnj+bhPZKuCrgxY8Rgk090jIQno91teIth1Cbfh3fDs0rh/v4M9UFN2Fth860tQ MIME-Version: 1.0 X-Received: by 2002:a02:95ae:: with SMTP id b43mr28653427jai.4.1546239902740; Sun, 30 Dec 2018 23:05:02 -0800 (PST) Date: Sun, 30 Dec 2018 23:05:02 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <00000000000023f74b057e4c0890@google.com> Subject: BUG: unable to handle kernel paging request in init_srcu_struct_fields From: syzbot To: bp@alien8.de, hpa@zytor.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, mingo@redhat.com, pbonzini@redhat.com, rkrcmar@redhat.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, x86@kernel.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 65e08c5e8631 Merge tag 'linux-kselftest-4.20-rc7' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=16ca3d2b400000 kernel config: https://syzkaller.appspot.com/x/.config?x=c8970c89a0efbb23 dashboard link: https://syzkaller.appspot.com/bug?extid=010232b93d20ef8abde5 compiler: gcc (GCC) 8.0.1 20180413 (experimental) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+010232b93d20ef8abde5@syzkaller.appspotmail.com BUG: unable to handle kernel paging request at ffffc90013465878 PGD 1da95a067 P4D 1da95a067 PUD 1da95b067 PMD 1bfe03067 PTE 0 kobject: 'kvm' (000000003b7ad1f2): kobject_uevent_env Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 31204 Comm: syz-executor4 Not tainted 4.20.0-rc6+ #372 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 kobject: 'kvm' (000000003b7ad1f2): kobject_uevent_env RIP: 0010:init_srcu_struct_nodes kernel/rcu/srcutree.c:161 [inline] RIP: 0010:init_srcu_struct_fields+0xd03/0x1470 kernel/rcu/srcutree.c:191 kobject: 'kvm' (000000003b7ad1f2): kobject_uevent_env Code: 88 00 00 00 48 89 f8 48 c1 e8 03 0f b6 04 18 84 c0 74 08 3c 03 0f 8e 0a 04 00 00 49 8d be 98 01 00 00 44 89 e1 b8 01 00 00 00 <41> 2b 8d 88 00 00 00 48 89 fa 48 c1 ea 03 d3 e0 80 3c 1a 00 48 98 RSP: 0018:ffff888182a37420 EFLAGS: 00010246 RAX: 0000000000000001 RBX: dffffc0000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8881daf00198 RBP: ffff888182a37600 R08: ffff8881b89ec140 R09: 0000000000000000 R10: ffffed103b5c5b5f R11: ffff8881dae2dafb R12: 0000000000000001 kobject: 'kvm' (000000003b7ad1f2): fill_kobj_path: path = '/devices/virtual/misc/kvm' R13: ffffc900134657f0 R14: ffff8881daf00000 R15: ffff8881daf000f0 FS: 00007f333e7d7700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90013465878 CR3: 00000001c01eb000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kobject: 'kvm' (000000003b7ad1f2): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (000000003b7ad1f2): kobject_uevent_env kobject: 'kvm' (000000003b7ad1f2): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (000000003b7ad1f2): fill_kobj_path: path = '/devices/virtual/misc/kvm' __init_srcu_struct+0x54/0x60 kernel/rcu/srcutree.c:207 kobject: 'kvm' (000000003b7ad1f2): kobject_uevent_env kvm_page_track_init+0x27/0x60 arch/x86/kvm/page_track.c:177 kvm_arch_init_vm+0x5f0/0x790 arch/x86/kvm/x86.c:9024 kobject: 'kvm' (000000003b7ad1f2): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (000000003b7ad1f2): kobject_uevent_env kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:641 [inline] kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3197 [inline] kvm_dev_ioctl+0x4c4/0x1ae0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3249 kobject: 'kvm' (000000003b7ad1f2): kobject_uevent_env kobject: 'kvm' (000000003b7ad1f2): kobject_uevent_env kobject: 'kvm' (000000003b7ad1f2): kobject_uevent_env kobject: 'kvm' (000000003b7ad1f2): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (000000003b7ad1f2): fill_kobj_path: path = '/devices/virtual/misc/kvm' vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0x1de/0x1790 fs/ioctl.c:696 kobject: 'kvm' (000000003b7ad1f2): fill_kobj_path: path = '/devices/virtual/misc/kvm' ksys_ioctl+0xa9/0xd0 fs/ioctl.c:713 __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457679 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f333e7d6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457679 RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000007 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f333e7d76d4 R13: 00000000004c00fe R14: 00000000004d1138 R15: 00000000ffffffff Modules linked in: CR2: ffffc90013465878 ---[ end trace 6d1d73f0a8f2db3c ]--- RIP: 0010:init_srcu_struct_nodes kernel/rcu/srcutree.c:161 [inline] RIP: 0010:init_srcu_struct_fields+0xd03/0x1470 kernel/rcu/srcutree.c:191 Code: 88 00 00 00 48 89 f8 48 c1 e8 03 0f b6 04 18 84 c0 74 08 3c 03 0f 8e 0a 04 00 00 49 8d be 98 01 00 00 44 89 e1 b8 01 00 00 00 <41> 2b 8d 88 00 00 00 48 89 fa 48 c1 ea 03 d3 e0 80 3c 1a 00 48 98 RSP: 0018:ffff888182a37420 EFLAGS: 00010246 RAX: 0000000000000001 RBX: dffffc0000000000 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8881daf00198 RBP: ffff888182a37600 R08: ffff8881b89ec140 R09: 0000000000000000 R10: ffffed103b5c5b5f R11: ffff8881dae2dafb R12: 0000000000000001 R13: ffffc900134657f0 R14: ffff8881daf00000 R15: ffff8881daf000f0 FS: 00007f333e7d7700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90013465878 CR3: 00000001c01eb000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug is generated by a bot. 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