BUG: soft lockup - CPU#0 stuck for 24s! [kworker/u6:0:6]
Modules linked in: xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 vboxsf(OE) tun arc4 md4 nls_utf8 cifs dns_resolver ip6t_rpfilter ip6t_REJECT ipt_REJECT xt_conntrack ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat iptable_mangle iptable_security iptable_raw nf_conntrack ip_set nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter sunrpc ppdev crc32_pclmul ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper vboxguest(OE) ablk_helper cryptd sg pcspkr i2c_piix4 parport_pc parport video ip_tables xfs libcrc32c sr_mod sd_mod cdrom crc_t10dif crct10dif_generic vmwgfx drm_kms_helper ttm virtio_net drm
ahci libahci crct10dif_pclmul crct10dif_common crc32c_intel libata serio_raw virtio_pci virtio_ring i2c_core virtio dm_mirror dm_region_hash dm_log dm_mod fuse
CPU: 0 PID: 6 Comm: kworker/u6:0 Tainted: G           OE  ------------   3.10.0-327.4.4.el7.x86_64 #1
Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
Workqueue: khelper __call_usermodehelper
task: ffff880196923980 ti: ffff880196950000 task.ti: ffff880196950000
RIP: 0010:[<ffffffff810d81a0>]  [<ffffffff810d81a0>] ktime_get_ts64+0xa0/0xf0
RSP: 0018:ffff880196953cd0  EFLAGS: 00010216
RAX: 7f370223f772cc59 RBX: ffff880196923980 RCX: 000000000000019b
RDX: 000000002920bd9b RSI: 0000000014c3d33f RDI: ffff88019ff85000
RBP: ffff880196953cf0 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000002 R11: ffffffffffffffe8 R12: 00000000000033fc
R13: 0000000000000007 R14: ffff88018f078bd8 R15: 0000000100018e64
FS:  0000000000000000(0000) GS:ffff88019fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00007f746b23cc08 CR3: 0000000195c18000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
0000000000000000 0000000000000000 0000000000804111 ffff88009dc39700
ffff880196953d78 ffffffff810791bb ffff8801969239e8 ffff88009dc39bd8
0000000000000000 ffff880100000000 0000000000000000 ffff8800cf773840
Call Trace:
[<ffffffff810791bb>] copy_process.part.25+0x5ab/0x1610
[<ffffffff81099e60>] ? ____call_usermodehelper+0x180/0x180
[<ffffffff8107a401>] do_fork+0xe1/0x320
[<ffffffff81013588>] ? __switch_to+0xf8/0x4b0
[<ffffffff8107a666>] kernel_thread+0x26/0x30
[<ffffffff810994ae>] __call_usermodehelper+0x2e/0x90
[<ffffffff8109d5fb>] process_one_work+0x17b/0x470
[<ffffffff8109e3cb>] worker_thread+0x11b/0x400
[<ffffffff8109e2b0>] ? rescuer_thread+0x400/0x400
[<ffffffff810a5aef>] kthread+0xcf/0xe0
[<ffffffff810a5a20>] ? kthread_create_on_node+0x140/0x140
[<ffffffff81645818>] ret_from_fork+0x58/0x90
[<ffffffff810a5a20>] ? kthread_create_on_node+0x140/0x140
Code: 00 48 d3 f8 48 8b 0d c0 ec cd 00 44 3b 35 41 ec cd 00 75 9b 48 01 f0 49 03 0c 24 48 3d ff c9 9a 3b 76 2e 31 d2 66 0f 1f 44 00 00 <48> 2d 00 ca 9a 3b 83 c2 01 48 3d ff c9 9a 3b 77 ef 5b 48 01 ca