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=-0.4 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,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 2A4F5C0044C for ; Mon, 29 Oct 2018 17:13:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CD02D204FD for ; Mon, 29 Oct 2018 17:13:06 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CD02D204FD 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 S1726720AbeJ3CCe (ORCPT ); Mon, 29 Oct 2018 22:02:34 -0400 Received: from mail-it1-f198.google.com ([209.85.166.198]:40207 "EHLO mail-it1-f198.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726016AbeJ3CCe (ORCPT ); Mon, 29 Oct 2018 22:02:34 -0400 Received: by mail-it1-f198.google.com with SMTP id y144-v6so1638609itc.5 for ; Mon, 29 Oct 2018 10:13:04 -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=o4zOmkNWWcfW9EvA4Y+n8wUO8cTkXYeuQYdkorrzKfw=; b=kauhM67XpDWT+RYKMg8EyvWl1dXz0sULpVp7R3r/x8tCfkVIA+a4MVwtgJR0OQqFJP lqyNKLP5vt9JsZIo8ZMTiHuXGJds506Nn5Tpy2aYDFda+2C+7VA6S1DG5nZm/ye8psZH x1H642KVZ+f4AnP6Tbb7RuGQpeCbhVjOyhWEdRTg82aYADZ+g5OAGCnYjvoKIlfBTCnc a5KdI7IsGvd9gF9SpT2UhyW+J3g11JUuTesBc/3JgP0i6dpLnQuFioPDE93qcyCpZj9K Z/hjxR6/YRhoqvrjRxQ/YuL/7SZToVpTp8VKZ8fNK3c+cfC7g+Wu4+KKnvkIfoci9Tzi zsRQ== X-Gm-Message-State: AGRZ1gKBNirqIFOJ4HBXkKpq3PkzkzzGbREwAi5SwWcCM7QTv5LHPpzs Mh6AVBptUBJVdiY8BQ4hHkwdBLDo2andnt+4hwFqixiTYGZ6 X-Google-Smtp-Source: AJdET5eIBblS8mKI4S+yTC6pPryXFiIEeW7FvxL7GaT5ycNmNn7F/1zd6vh5qeevHekbuqNAyr3wFJLUlx6Gc5cnnoooKDF9UPbl MIME-Version: 1.0 X-Received: by 2002:a24:7c8b:: with SMTP id a133-v6mr4350632itd.9.1540833183831; Mon, 29 Oct 2018 10:13:03 -0700 (PDT) Date: Mon, 29 Oct 2018 10:13:03 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000949c7a0579612eb3@google.com> Subject: divide error in vivid_vid_cap_s_dv_timings 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 Hello, syzbot found the following crash on: HEAD commit: b179f0826c6a Add linux-next specific files for 20181029 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=175ea9c5400000 kernel config: https://syzkaller.appspot.com/x/.config?x=6b2b22387bad67fc dashboard link: https://syzkaller.appspot.com/bug?extid=57c3d83d71187054d56f 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+57c3d83d71187054d56f@syzkaller.appspotmail.com divide error: 0000 [#1] PREEMPT SMP KASAN netlink: 20 bytes leftover after parsing attributes in process `syz-executor5'. CPU: 0 PID: 26335 Comm: syz-executor2 Not tainted 4.19.0-next-20181029+ #100 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:valid_cvt_gtf_timings drivers/media/platform/vivid/vivid-vid-cap.c:1633 [inline] RIP: 0010:vivid_vid_cap_s_dv_timings+0x60e/0x11e0 drivers/media/platform/vivid/vivid-vid-cap.c:1664 Code: c6 84 c9 0f 95 c1 40 84 ce 0f 85 ce 0a 00 00 83 e0 07 38 c2 0f 9e c1 84 d2 0f 95 c0 84 c1 0f 85 b9 0a 00 00 48 8b 43 14 31 d2 <41> f7 f7 48 ba 00 00 00 00 00 fc ff df 4c 8d 7b 40 89 85 64 ff ff RSP: 0018:ffff880180caf630 EFLAGS: 00010246 RAX: 0000000002000000 RBX: ffff8801ce323700 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801ce323714 RBP: ffff880180caf6f0 R08: 0000000000000001 R09: ffffed003971a024 R10: ffffed003971a024 R11: ffff8801cb8d0123 R12: ffff8801cb8d0080 R13: 1ffff10030195ecd R14: 0000000000000000 R15: 0000000000000000 FS: 00007f3d49d6e700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000727e4c CR3: 00000001d9174000 CR4: 00000000001426f0 Call Trace: vidioc_s_dv_timings+0xa4/0xc0 drivers/media/platform/vivid/vivid-core.c:323 v4l_stub_s_dv_timings+0x4f/0x60 drivers/media/v4l2-core/v4l2-ioctl.c:2581 __video_do_ioctl+0x519/0xf00 drivers/media/v4l2-core/v4l2-ioctl.c:2833 kobject: 'loop5' (00000000a1276308): kobject_uevent_env video_usercopy+0x5c1/0x1750 drivers/media/v4l2-core/v4l2-ioctl.c:3013 kobject: 'loop5' (00000000a1276308): fill_kobj_path: path = '/devices/virtual/block/loop5' netlink: 20 bytes leftover after parsing attributes in process `syz-executor5'. kobject: 'loop5' (00000000a1276308): kobject_uevent_env video_ioctl2+0x2c/0x33 drivers/media/v4l2-core/v4l2-ioctl.c:3057 v4l2_ioctl+0x154/0x1b0 drivers/media/v4l2-core/v4l2-dev.c:364 kobject: 'loop5' (00000000a1276308): fill_kobj_path: path = '/devices/virtual/block/loop5' vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1790 fs/ioctl.c:688 netlink: 20 bytes leftover after parsing attributes in process `syz-executor5'. ksys_ioctl+0xa9/0xd0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:710 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 kobject: 'loop5' (00000000a1276308): kobject_uevent_env kobject: 'loop5' (00000000a1276308): fill_kobj_path: path = '/devices/virtual/block/loop5' entry_SYSCALL_64_after_hwframe+0x49/0xbe netlink: 20 bytes leftover after parsing attributes in process `syz-executor5'. RIP: 0033:0x457569 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:00007f3d49d6dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000020000040 RSI: 00000000c0845657 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3d49d6e6d4 kobject: 'loop5' (00000000a1276308): kobject_uevent_env R13: 00000000004c1e32 R14: 00000000004d2e40 R15: 00000000ffffffff Modules linked in: ---[ end trace c59f37d57fa3eae0 ]--- kobject: 'loop5' (00000000a1276308): fill_kobj_path: path = '/devices/virtual/block/loop5' RIP: 0010:valid_cvt_gtf_timings drivers/media/platform/vivid/vivid-vid-cap.c:1633 [inline] RIP: 0010:vivid_vid_cap_s_dv_timings+0x60e/0x11e0 drivers/media/platform/vivid/vivid-vid-cap.c:1664 kobject: 'loop4' (00000000e1a0902a): kobject_uevent_env kobject: 'loop4' (00000000e1a0902a): fill_kobj_path: path = '/devices/virtual/block/loop4' Code: c6 84 c9 0f 95 c1 40 84 ce 0f 85 ce 0a 00 00 83 e0 07 38 c2 0f 9e c1 84 d2 0f 95 c0 84 c1 0f 85 b9 0a 00 00 48 8b 43 14 31 d2 <41> f7 f7 48 ba 00 00 00 00 00 fc ff df 4c 8d 7b 40 89 85 64 ff ff kobject: 'loop5' (00000000a1276308): kobject_uevent_env kobject: 'kvm' (0000000010b8511c): kobject_uevent_env kobject: 'kvm' (0000000010b8511c): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop5' (00000000a1276308): fill_kobj_path: path = '/devices/virtual/block/loop5' RSP: 0018:ffff880180caf630 EFLAGS: 00010246 RAX: 0000000002000000 RBX: ffff8801ce323700 RCX: 0000000000000001 kobject: 'loop1' (00000000c8fe2913): kobject_uevent_env kobject: 'kvm' (0000000010b8511c): kobject_uevent_env kobject: 'loop1' (00000000c8fe2913): fill_kobj_path: path = '/devices/virtual/block/loop1' RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8801ce323714 kobject: 'kvm' (0000000010b8511c): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000010b8511c): kobject_uevent_env kobject: 'kvm' (0000000010b8511c): fill_kobj_path: path = '/devices/virtual/misc/kvm' RBP: ffff880180caf6f0 R08: 0000000000000001 R09: ffffed003971a024 kobject: 'kvm' (0000000010b8511c): kobject_uevent_env kobject: 'kvm' (0000000010b8511c): fill_kobj_path: path = '/devices/virtual/misc/kvm' R10: ffffed003971a024 R11: ffff8801cb8d0123 R12: ffff8801cb8d0080 R13: 1ffff10030195ecd R14: 0000000000000000 R15: 0000000000000000 FS: 00007f3d49d6e700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 kobject: 'loop4' (00000000e1a0902a): kobject_uevent_env CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'loop4' (00000000e1a0902a): fill_kobj_path: path = '/devices/virtual/block/loop4' CR2: 00007fd3f654b000 CR3: 00000001d9174000 CR4: 00000000001426f0 --- 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#bug-status-tracking for how to communicate with syzbot.