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=-5.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, 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 1538AC43441 for ; Fri, 9 Nov 2018 18:18:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AD90320855 for ; Fri, 9 Nov 2018 18:18:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AD90320855 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 S1728616AbeKJD7t (ORCPT ); Fri, 9 Nov 2018 22:59:49 -0500 Received: from mail-io1-f71.google.com ([209.85.166.71]:36335 "EHLO mail-io1-f71.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728108AbeKJD7t (ORCPT ); Fri, 9 Nov 2018 22:59:49 -0500 Received: by mail-io1-f71.google.com with SMTP id w5-v6so3109261ioj.3 for ; Fri, 09 Nov 2018 10:18:04 -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=dCcaTbTkDIU7sVG8zte5t78TWRy10uQ7rbC6unyZelE=; b=fXRg82rpVqbZkmmH47ujf4E5kgVEUmwBoBRTD1kDCnVsnOeJLDJue6vX5vhfRnM6tS zw5TpL9o8N2Q5irhrmxJ0WM+O9PQcvwQzaPJj8Y/MhHTMkNo7fUvA387z+W8abb8Yw++ XGoBJwIvyrBDe9/ObjxjrhgGzsxMjzHsujgBPMoosIUQgKvNCXeRroVok2BLy/sS14gd QV8TJ4iA9oBFH+aeLJ+16kAjCRc5P3n/LKK+zrovS/7yEW+Gpgwe/PYCOn7ZsPA3AvN6 7ABV4nhtZet/xnbCR3MVRcnzoMV4DBN+J+dtwaLYDO7ZNXx4/ROqKvl5/Bx31NvLqR32 WrKA== X-Gm-Message-State: AGRZ1gLwpYeeC1GwDj77CGdS9O8CYOh4hev/8x6ZdHqQIoS+M5EtcJFt UyolYT6Mb1Ydq0gZLb1adFijFeQS/YsKLK2wXEnJO6GQgQwk X-Google-Smtp-Source: AJdET5fSZ3WfVY6RvEuXHvhCdrJA5PWZgBgx6r07NCOrT5aBgL9mEG+hauwIE2G4wd0HVGO5zvvKZwRKrDJ6vv1QrrdVYVLscdkH MIME-Version: 1.0 X-Received: by 2002:a24:6cb:: with SMTP id 194-v6mr2700661itv.18.1541787484256; Fri, 09 Nov 2018 10:18:04 -0800 (PST) Date: Fri, 09 Nov 2018 10:18:04 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000519231057a3f5fc2@google.com> Subject: possible deadlock in v4l2_m2m_fop_poll From: syzbot To: ezequiel@collabora.com, hans.verkuil@cisco.com, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, mchehab@kernel.org, syzkaller-bugs@googlegroups.com, viro@zeniv.linux.org.uk 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: 24ccea7e102d Merge tag 'xfs-4.20-fixes-1' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=107166a3400000 kernel config: https://syzkaller.appspot.com/x/.config?x=8f559fee2fc3375a dashboard link: https://syzkaller.appspot.com/bug?extid=2178a0152e4d91ab271c 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+2178a0152e4d91ab271c@syzkaller.appspotmail.com netlink: 'syz-executor1': attribute type 1 has an invalid length. ====================================================== WARNING: possible circular locking dependency detected 4.20.0-rc1+ #327 Not tainted kobject: 'loop4' (0000000063546ed3): kobject_uevent_env ------------------------------------------------------ syz-executor3/22066 is trying to acquire lock: 00000000875c8131 (&dev->dev_mutex){+.+.}, at: v4l2_m2m_fop_poll+0x98/0x120 drivers/media/v4l2-core/v4l2-mem2mem.c:1105 but task is already holding lock: kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' 00000000114dc15b (&ep->mtx){+.+.}, at: __do_sys_epoll_ctl fs/eventpoll.c:2085 [inline] 00000000114dc15b (&ep->mtx){+.+.}, at: __se_sys_epoll_ctl fs/eventpoll.c:2007 [inline] 00000000114dc15b (&ep->mtx){+.+.}, at: __x64_sys_epoll_ctl+0x7d4/0x1080 fs/eventpoll.c:2007 which lock already depends on the new lock. kobject: 'loop2' (0000000099e50969): kobject_uevent_env the existing dependency chain (in reverse order) is: -> #4 (&ep->mtx){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0x166/0x16f0 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 ep_free+0x160/0x300 fs/eventpoll.c:849 ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:869 __fput+0x385/0xa30 fs/file_table.c:278 kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env -> #3 (epmutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0x166/0x16f0 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 ep_free+0xf6/0x300 fs/eventpoll.c:829 ep_eventpoll_release+0x44/0x60 fs/eventpoll.c:869 kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' __fput+0x385/0xa30 fs/file_table.c:278 delayed_fput+0x55/0x80 fs/file_table.c:304 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 -> #2 ((delayed_fput_work).work){+.+.}: process_one_work+0xc0a/0x1c40 kernel/workqueue.c:2129 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 -> #1 ((wq_completion)"events"){+.+.}: flush_workqueue+0x30a/0x1e10 kernel/workqueue.c:2655 flush_scheduled_work include/linux/workqueue.h:599 [inline] vim2m_stop_streaming+0x7c/0x2c0 drivers/media/platform/vim2m.c:811 __vb2_queue_cancel+0x171/0xd20 drivers/media/common/videobuf2/videobuf2-core.c:1823 vb2_core_queue_release+0x26/0x80 drivers/media/common/videobuf2/videobuf2-core.c:2229 vb2_queue_release+0x15/0x20 drivers/media/common/videobuf2/videobuf2-v4l2.c:837 v4l2_m2m_ctx_release+0x1e/0x35 drivers/media/v4l2-core/v4l2-mem2mem.c:930 vim2m_release+0xe6/0x150 drivers/media/platform/vim2m.c:977 v4l2_release+0x224/0x3a0 drivers/media/v4l2-core/v4l2-dev.c:456 __fput+0x385/0xa30 fs/file_table.c:278 ____fput+0x15/0x20 fs/file_table.c:309 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&dev->dev_mutex){+.+.}: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0x166/0x16f0 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 v4l2_m2m_fop_poll+0x98/0x120 drivers/media/v4l2-core/v4l2-mem2mem.c:1105 v4l2_poll+0x153/0x200 drivers/media/v4l2-core/v4l2-dev.c:350 vfs_poll include/linux/poll.h:86 [inline] ep_item_poll.isra.15+0x15c/0x400 fs/eventpoll.c:892 ep_insert+0x781/0x1dd0 fs/eventpoll.c:1464 __do_sys_epoll_ctl fs/eventpoll.c:2121 [inline] __se_sys_epoll_ctl fs/eventpoll.c:2007 [inline] __x64_sys_epoll_ctl+0xeda/0x1080 fs/eventpoll.c:2007 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: &dev->dev_mutex --> epmutex --> &ep->mtx Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ep->mtx); lock(epmutex); lock(&ep->mtx); lock(&dev->dev_mutex); *** DEADLOCK *** 1 lock held by syz-executor3/22066: #0: 00000000114dc15b (&ep->mtx){+.+.}, at: __do_sys_epoll_ctl fs/eventpoll.c:2085 [inline] #0: 00000000114dc15b (&ep->mtx){+.+.}, at: __se_sys_epoll_ctl fs/eventpoll.c:2007 [inline] #0: 00000000114dc15b (&ep->mtx){+.+.}, at: __x64_sys_epoll_ctl+0x7d4/0x1080 fs/eventpoll.c:2007 stack backtrace: CPU: 1 PID: 22066 Comm: syz-executor3 Not tainted 4.20.0-rc1+ #327 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 print_circular_bug.isra.35.cold.54+0x1bd/0x27d kernel/locking/lockdep.c:1221 check_prev_add kernel/locking/lockdep.c:1863 [inline] check_prevs_add kernel/locking/lockdep.c:1976 [inline] validate_chain kernel/locking/lockdep.c:2347 [inline] __lock_acquire+0x3399/0x4c20 kernel/locking/lockdep.c:3341 lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __mutex_lock_common kernel/locking/mutex.c:925 [inline] __mutex_lock+0x166/0x16f0 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 v4l2_m2m_fop_poll+0x98/0x120 drivers/media/v4l2-core/v4l2-mem2mem.c:1105 v4l2_poll+0x153/0x200 drivers/media/v4l2-core/v4l2-dev.c:350 vfs_poll include/linux/poll.h:86 [inline] ep_item_poll.isra.15+0x15c/0x400 fs/eventpoll.c:892 ep_insert+0x781/0x1dd0 fs/eventpoll.c:1464 __do_sys_epoll_ctl fs/eventpoll.c:2121 [inline] __se_sys_epoll_ctl fs/eventpoll.c:2007 [inline] __x64_sys_epoll_ctl+0xeda/0x1080 fs/eventpoll.c:2007 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe 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:00007fa4744a6c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457569 RDX: 0000000000000008 RSI: 0000000000000001 RDI: 0000000000000009 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000020000280 R11: 0000000000000246 R12: 00007fa4744a76d4 R13: 00000000004bdb6c R14: 00000000004cc9b0 R15: 00000000ffffffff kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop2' (0000000099e50969): kobject_uevent_env netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' validate_nla: 30 callbacks suppressed netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop1' (00000000d3c6e9ae): kobject_uevent_env kobject: 'loop1' (00000000d3c6e9ae): fill_kobj_path: path = '/devices/virtual/block/loop1' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' validate_nla: 47 callbacks suppressed netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop4' (0000000063546ed3): kobject_uevent_env kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop2' (0000000099e50969): kobject_uevent_env netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop4' (0000000063546ed3): kobject_uevent_env netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop4' (0000000063546ed3): fill_kobj_path: path = '/devices/virtual/block/loop4' kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop3' (000000007e59c04e): kobject_uevent_env kobject: 'loop3' (000000007e59c04e): fill_kobj_path: path = '/devices/virtual/block/loop3' kobject: 'loop2' (0000000099e50969): kobject_uevent_env kobject: 'loop2' (0000000099e50969): fill_kobj_path: path = '/devices/virtual/block/loop2' netlink: 'syz-executor1': attribute type 1 has an invalid length. kobject: 'loop5' (00000000f83a2beb): kobject_uevent_env kobject: 'loop5' (00000000f83a2beb): fill_kobj_path: path = '/devices/virtual/block/loop5' --- 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.