Comment 3 for bug 1498070

I get nothing with "udevadm monitor -k"

In dmesg I'm getting lot of this:

[21389.065280] BUG: soft lockup - CPU#2 stuck for 24s! [systemd-udevd:16162]
[21389.065284] Modules linked in: hid_sony ff_memless cdc_acm bbswitch(OF) pci_stub vboxpci(OF) vboxnetadp(OF) vboxnetflt(OF) vboxdrv(OF) rfcomm bnep bluetooth 6lowpan_iphc snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic binfmt_misc joydev uvcvideo hid_generic videobuf2_vmalloc videobuf2_memops videobuf2_core ums_realtek usbhid usb_storage videodev hid nls_iso8859_1 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm asus_nb_wmi asus_wmi sparse_keymap mxm_wmi x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm arc4 snd_seq_midi snd_seq_midi_event crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_rawmidi ath9k ath9k_common aesni_intel ath9k_hw aes_x86_64 lrw ath gf128mul glue_helper ablk_helper cryptd i915 mac80211 snd_seq microcode snd_seq_device snd_timer cfg80211 snd serio_raw drm_kms_helper drm mei_me mei i2c_algo_bit soundcore lpc_ich video shpchp mac_hid wmi parport_pc ppdev msr lp parport ahci psmouse r8169 libahci mii [last unloaded: nvidia]
[21389.065334] CPU: 2 PID: 16162 Comm: systemd-udevd Tainted: PF O 3.14.52-031452-generic #201509131726
[21389.065336] Hardware name: ASUSTeK COMPUTER INC. X750JB/X750JB, BIOS X750JB.208 08/14/2013
[21389.065338] task: ffff88020fab4b30 ti: ffff8801ddcca000 task.ti: ffff8801ddcca000
[21389.065339] RIP: 0010:[<ffffffff81728762>] [<ffffffff81728762>] _raw_spin_lock+0x12/0x50
[21389.065345] RSP: 0018:ffff8801ddccbb60 EFLAGS: 00000202
[21389.065346] RAX: 0000000041804180 RBX: 0000000000000000 RCX: 00000000000039e2
[21389.065348] RDX: ffff8800b9a9e440 RSI: ffff8801ddccbba8 RDI: ffff8801f72f3718
[21389.065349] RBP: ffff8801ddccbb60 R08: 0000000000000000 R09: 0000000000000246
[21389.065350] R10: ffffffff8123beae R11: ffffea000312d8c0 R12: 00000000f028f026
[21389.065351] R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000246
[21389.065353] FS: 00007f88b48e5880(0000) GS:ffff88022fa80000(0000) knlGS:0000000000000000
[21389.065354] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[21389.065355] CR2: 00007f04a9832000 CR3: 0000000212fac000 CR4: 00000000001407e0
[21389.065357] Stack:
[21389.065358] ffff8801ddccbb90 ffffffff811dbe1a ffff8801ddccbba8 ffff8800b9a9e180
[21389.065361] 0000000000000024 ffff8801ddccbdd0 ffff8801ddccbbd8 ffffffff811dce54
[21389.065363] ffff8800b9a9e180 ffff8800b9a9e2c0 ffff8801f72f3740 0000000000000024
[21389.065366] Call Trace:
[21389.065371] [<ffffffff811dbe1a>] shrink_dentry_list+0x2a/0x110
[21389.065374] [<ffffffff811dce54>] check_submounts_and_drop+0x74/0xa0
[21389.065378] [<ffffffff8123baec>] kernfs_dop_revalidate+0x5c/0xd0
[21389.065380] [<ffffffff811cfe5d>] lookup_fast+0x26d/0x2c0
[21389.065383] [<ffffffff812df85c>] ? security_inode_permission+0x1c/0x30
[21389.065385] [<ffffffff811d08b2>] ? __inode_permission+0x52/0xc0
[21389.065388] [<ffffffff811d0f29>] link_path_walk+0x1d9/0x8b0
[21389.065390] [<ffffffff811dae35>] ? __d_free+0x35/0x40
[21389.065392] [<ffffffff811dbbd5>] ? dentry_kill+0x255/0x2e0
[21389.065395] [<ffffffff811e46a4>] ? mntput+0x24/0x40
[21389.065397] [<ffffffff811d165b>] path_lookupat+0x5b/0x790
[21389.065401] [<ffffffff8117de49>] ? __do_fault+0x3d9/0x4f0
[21389.065405] [<ffffffff811a9321>] ? kmem_cache_alloc+0x31/0x140
[21389.065407] [<ffffffff811d061f>] ? getname_flags+0x4f/0x1a0
[21389.065409] [<ffffffff811d1dbb>] filename_lookup+0x2b/0xc0
[21389.065411] [<ffffffff811d5ce4>] user_path_at_empty+0x54/0x90
[21389.065413] [<ffffffff811d05a2>] ? final_putname+0x22/0x50
[21389.065415] [<ffffffff811d5d31>] user_path_at+0x11/0x20
[21389.065418] [<ffffffff811ca010>] vfs_fstatat+0x50/0xa0
[21389.065421] [<ffffffff810a037b>] ? account_user_time+0x8b/0xa0
[21389.065423] [<ffffffff811ca4af>] SYSC_newstat+0x1f/0x40
[21389.065427] [<ffffffff81022a05>] ? syscall_trace_enter+0x145/0x250
[21389.065431] [<ffffffff81731b3c>] ? tracesys+0x7e/0xe6
[21389.065434] [<ffffffff811ca6fe>] SyS_newstat+0xe/0x10
[21389.065436] [<ffffffff81731b9f>] tracesys+0xe1/0xe6
[21389.065437] Code: 0f b7 0f 66 39 ca 75 f1 5d c3 0f 1f 80 00 00 00 00 eb d6 66 0f 1f 44 00 00 0f 1f 44 00 00 55 48 89 e5 b8 00 00 02 00 f0 0f c1 07 <89> c2 c1 ea 10 66 39 c2 75 02 5d c3 83 e2 fe 0f b7 f2 b8 00 80

Complete dmesg output attached.