Backtrace

NMI watchdog: BUG: soft lockup - CPU#0 stuck for 504s! [kube-apiserver:19702]
Modules linked in: dummy vport_vxlan openvswitch ip_set_hash_net xt_statistic nf_tables ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs ip_set_hash_ip xt_set ip_set ip6table_mangle ip6t_MASQUERADE nf_nat_masquerade_ipv6 xt_nat ip6table_filter ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6_tables veth xt_comment vxlan ip6_udp_tunnel udp_tunnel iptable_mangle xt_mark xt_conntrack ipt_MASQUERADE nf_nat_masquerade_ipv4 nf_conntrack_netlink xt_addrtype iptable_filter iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack br_netfilter bridge stp llc vboxsf(OE) binfmt_misc overlay(T) lockd grace sunrpc crc32_pclmul joydev ppdev ghash_clmulni_intel snd_intel8x0 snd_ac97_codec ac97_bus aesni_intel snd_seq lrw gf128mul snd_seq_device glue_helper ablk_helper cryptd snd_pcm
pcspkr sg snd_timer snd parport_pc vboxguest(OE) i2c_piix4 parport soundcore video ip_tables xfs libcrc32c sr_mod cdrom sd_mod crc_t10dif crct10dif_generic ata_generic pata_acpi vmwgfx drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm ahci drm serio_raw ata_piix libahci crct10dif_pclmul crct10dif_common crc32c_intel libata e1000 drm_panel_orientation_quirks dm_mirror dm_region_hash dm_log dm_mod fuse
CPU: 0 PID: 19702 Comm: kube-apiserver Kdump: loaded Tainted: G           OEL ------------ T 3.10.0-1160.62.1.el7.x86_64 #1
Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
task: ffff8a2bd5418000 ti: ffff8a28cf724000 task.ti: ffff8a28cf724000
RIP: 0010:[<ffffffffb058e9f5>]  [<ffffffffb058e9f5>] _raw_spin_unlock_irqrestore+0x15/0x20
RSP: 0018:ffff8a28cf7277f8  EFLAGS: 00000282
RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffff8a2c1fc00000
RDX: 0000000000000000 RSI: 0000000000000282 RDI: 0000000000000282
RBP: ffff8a28cf7277f8 R08: ffffffffb0f06078 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000003 R12: ffffffffb045802c
R13: ffff8a28cf727778 R14: ffff8a2c0e9cf8f8 R15: ffff8a2c0e9cf8f8
FS:  000000c00259c890(0000) GS:ffff8a2c1fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00001001dbb4fbe8 CR3: 00000003d3a48000 CR4: 00000000000606f0
Call Trace:
[<ffffffffafeaece4>] mod_timer_pending+0x74/0x1a0
[<ffffffffc07e2e48>] __nf_ct_refresh_acct+0x78/0xd0 [nf_conntrack]
[<ffffffffc07ebcc8>] tcp_packet+0x3b8/0xa60 [nf_conntrack]
[<ffffffffafea4207>] ? local_bh_enable+0x17/0x20
[<ffffffffc07e3eaf>] ? __nf_conntrack_find_get+0x17f/0x370 [nf_conntrack]
[<ffffffffc07e55ad>] nf_conntrack_in+0x3cd/0x670 [nf_conntrack]
[<ffffffffc080942f>] ipv4_conntrack_local+0x4f/0x60 [nf_conntrack_ipv4]
[<ffffffffb0499aa8>] nf_iterate+0x98/0xe0
[<ffffffffb0499b98>] nf_hook_slow+0xa8/0x110
[<ffffffffb04a8bc2>] __ip_local_out_sk+0x102/0x110
[<ffffffffb04a81a0>] ? ip_forward_options+0x1c0/0x1c0
[<ffffffffb04a8beb>] ip_local_out_sk+0x1b/0x40
[<ffffffffb04a8fa4>] ip_queue_xmit+0x144/0x3c0
[<ffffffffb04c3724>] tcp_transmit_skb+0x4e4/0x9e0
[<ffffffffb04c3daa>] tcp_write_xmit+0x18a/0xd40
[<ffffffffb04c4bee>] __tcp_push_pending_frames+0x2e/0xc0
[<ffffffffb04b2bfc>] tcp_push+0xec/0x120
[<ffffffffb04b6642>] tcp_sendmsg+0xd2/0xc60
[<ffffffffb043ea08>] ? release_sock+0x128/0x180
[<ffffffffb04e2e39>] inet_sendmsg+0x69/0xb0
[<ffffffffb04e2fe0>] ? inet_recvmsg+0x80/0xb0
[<ffffffffb043856d>] sock_aio_write+0x15d/0x180
[<ffffffffb004da03>] do_sync_write+0x93/0xe0
[<ffffffffb004e595>] vfs_write+0x1c5/0x1f0
[<ffffffffb004f215>] SyS_write+0x55/0xd0
[<ffffffffb059a226>] tracesys+0xa6/0xcc
Code: f6 8b 98 ff 66 90 5d c3 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 e8 d6 8b 98 ff 66 90 48 89 f7 57 9d <0f> 1f 44 00 00 5d c3 0f 1f 40 00 0f 1f 44 00 00 55 48 89 e5 48