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=-2.9 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS,UNWANTED_LANGUAGE_BODY,URIBL_BLOCKED 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 DDC97C43441 for ; Sun, 18 Nov 2018 20:09:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id ABCBE2086B for ; Sun, 18 Nov 2018 20:09:05 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ABCBE2086B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727547AbeKSGaR (ORCPT ); Mon, 19 Nov 2018 01:30:17 -0500 Received: from mail-it1-f197.google.com ([209.85.166.197]:37137 "EHLO mail-it1-f197.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727385AbeKSGaQ (ORCPT ); Mon, 19 Nov 2018 01:30:16 -0500 Received: by mail-it1-f197.google.com with SMTP id y86so5815077ita.2 for ; Sun, 18 Nov 2018 12:09:03 -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:in-reply-to:message-id:subject :from:to; bh=0yxo2skjGjzZRUTefV6PFpzDK+NUq9sZBZPVoAy3rOg=; b=m+KSUCMSBpErWL+i3jBjpTzQ9+TBIPkj3kTKKSKULPKVik/2C+vqDXo2nSDzaN1z2D 4k+HTHOVII9sUzCq9+LnzJGVeFAlX6ql4zuye7RmNhFA60i9AHKL+TJptx8nCexa+zwG 9zi98hqPVO5nirnUsvag5sgyGo4QTah5aHsUnQQjaqWWRIjas7dD2v+WG8QAbY1v/jxa 0/UvRE0156wUHe/y4AXh1faCHkd5kF9TCw9LUP3H5TW4wECA36xQEjNLZLqOmN0cWEvF Rs2eoTa5LDDSHmi6Rf0zyCUWY/AduLUzx01ZMB8l+OktuJhaAMMtQKR4elfgiTDOSYwx i8DQ== X-Gm-Message-State: AGRZ1gJ4s5YX/iX+9oRi6B7yU6W7XxQ/aXamMuafwk5zdA2mOctKkyLZ y3eJ2Y51y9w3wZYoc9+rvVF4PPIAYu2melGAhBsuwsl+4Dx0 X-Google-Smtp-Source: AJdET5ehMShQrDv1aN/IvEKqGerwVT5Xi39lXets3pr0pAAF8lzOM7KlsjGjDiagvNRGncAdx4PSQQpXzNz6AJzmSMHH3jZqGvRh MIME-Version: 1.0 X-Received: by 2002:a24:cc04:: with SMTP id x4-v6mr5467824itf.14.1542571743017; Sun, 18 Nov 2018 12:09:03 -0800 (PST) Date: Sun, 18 Nov 2018 12:09:03 -0800 In-Reply-To: <0000000000001c2b95057ad0935b@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000c881ea057af5f8a6@google.com> Subject: Re: kernel BUG at arch/x86/mm/physaddr.c:LINE! (2) From: syzbot To: hverkuil@xs4all.nl, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, syzkaller-bugs@googlegroups.com 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 syzbot has found a reproducer for the following crash on: HEAD commit: 1ce80e0fe98e Merge tag 'fsnotify_for_v4.20-rc3' of git://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=10fd0893400000 kernel config: https://syzkaller.appspot.com/x/.config?x=d86f24333880b605 dashboard link: https://syzkaller.appspot.com/bug?extid=6c0effb5877f6b0344e2 compiler: gcc (GCC) 8.0.1 20180413 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1312062b400000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=131bd093400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+6c0effb5877f6b0344e2@syzkaller.appspotmail.com audit: type=1800 audit(1542571519.564:30): pid=5852 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 ------------[ cut here ]------------ kernel BUG at arch/x86/mm/physaddr.c:27! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 6007 Comm: syz-executor386 Not tainted 4.20.0-rc2+ #338 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__phys_addr+0xb5/0x120 arch/x86/mm/physaddr.c:27 Code: 08 4c 89 e3 31 ff 48 d3 eb 48 89 de e8 b4 bb 45 00 48 85 db 75 0f e8 7a ba 45 00 4c 89 e0 5b 41 5c 41 5d 5d c3 e8 6b ba 45 00 <0f> 0b e8 64 ba 45 00 48 c7 c7 10 20 47 89 48 b8 00 00 00 00 00 fc RSP: 0018:ffff8881c3567410 EFLAGS: 00010093 RAX: ffff8881d32b4080 RBX: 0000000000000001 RCX: ffffffff8139cd5c RDX: 0000000000000000 RSI: ffffffff8139cd75 RDI: 0000000000000007 RBP: ffff8881c3567428 R08: ffff8881d32b4080 R09: ffffed103b5c5b67 R10: ffffed103b5c5b67 R11: ffff8881dae2db3b R12: 0000408005dd6000 R13: 0000000000000000 R14: 0000000000000010 R15: ffff8881c3567ab8 FS: 0000000001f9e880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000203e8008 CR3: 00000001c24cd000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: virt_to_head_page include/linux/mm.h:658 [inline] virt_to_cache mm/slab.c:399 [inline] kfree+0x7b/0x230 mm/slab.c:3813 vivid_vid_cap_s_selection+0x2c31/0x38e0 drivers/media/platform/vivid/vivid-vid-cap.c:1006 vidioc_s_selection+0xa4/0xc0 drivers/media/platform/vivid/vivid-core.c:352 v4l_s_selection+0xba/0x140 drivers/media/v4l2-core/v4l2-ioctl.c:2197 __video_do_ioctl+0x8b1/0x1050 drivers/media/v4l2-core/v4l2-ioctl.c:2853 video_usercopy+0x5c1/0x1760 drivers/media/v4l2-core/v4l2-ioctl.c:3035 video_ioctl2+0x2c/0x33 drivers/media/v4l2-core/v4l2-ioctl.c:3079 v4l2_ioctl+0x154/0x1b0 drivers/media/v4l2-core/v4l2-dev.c:364 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:509 [inline] do_vfs_ioctl+0x1de/0x1790 fs/ioctl.c:696 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: 0033:0x4442c9 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 7b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fff0d831768 EFLAGS: 00000207 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 00000000004442c9 RDX: 0000000020000000 RSI: 00000000c040565f RDI: 0000000000000005 RBP: 00000000006ce018 R08: 00000000004002e0 R09: 00000000004002e0 R10: 0000000000000000 R11: 0000000000000207 R12: 0000000000401fd0 R13: 0000000000402060 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 57f6f02b74dd3e8e ]--- RIP: 0010:__phys_addr+0xb5/0x120 arch/x86/mm/physaddr.c:27 Code: 08 4c 89 e3 31 ff 48 d3 eb 48 89 de e8 b4 bb 45 00 48 85 db 75 0f e8 7a ba 45 00 4c 89 e0 5b 41 5c 41 5d 5d c3 e8 6b ba 45 00 <0f> 0b e8 64 ba 45 00 48 c7 c7 10 20 47 89 48 b8 00 00 00 00 00 fc RSP: 0018:ffff8881c3567410 EFLAGS: 00010093 RAX: ffff8881d32b4080 RBX: 0000000000000001 RCX: ffffffff8139cd5c RDX: 0000000000000000 RSI: ffffffff8139cd75 RDI: 0000000000000007 RBP: ffff8881c3567428 R08: ffff8881d32b4080 R09: ffffed103b5c5b67 R10: ffffed103b5c5b67 R11: ffff8881dae2db3b R12: 0000408005dd6000 R13: 0000000000000000 R14: 0000000000000010 R15: ffff8881c3567ab8 FS: 0000000001f9e880(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000203e8008 CR3: 00000001c24cd000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400