May  5 18:28:54 helisrv kernel: [64105.332523] BUG: soft lockup - CPU#6 stuck for 22s! [smbd:22841]
May  5 18:28:54 helisrv kernel: [64105.332880] Modules linked in: xt_multiport i
pt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt
_conntrack nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp bridge s
tp llc ipmi_devintf ipmi_si ipmi_msghandler ip6table_filter ip6_tables iptable_f
ilter ip_tables ebtable_nat ebtables x_tables arc4 md4 nfsv3 rpcsec_gss_krb5 nfs
v4 gpio_ich intel_rapl x86_pkg_temp_thermal intel_powerclamp kvm_intel kvm crct1
0dif_pclmul nfsd crc32_pclmul parport_pc cryptd auth_rpcgss ppdev nfs_acl nct677
5 nfs hwmon_vid coretemp lockd joydev serio_raw lpc_ich lp sunrpc mac_hid shpchp
 parport nls_utf8 cifs fscache raid10 raid456 async_raid6_recov async_memcpy asy
nc_pq async_xor async_tx xor raid6_pq hid_generic raid1 e1000e usbhid ahci raid0
 psmouse ptp multipath 3w_9xxx hid libahci pps_core linear
May  5 18:28:54 helisrv kernel: [64105.332915] CPU: 6 PID: 22841 Comm: smbd Not tainted 3.16.0-70-generic #90~14.04.1-Ubuntu
May  5 18:28:54 helisrv kernel: [64105.332916] Hardware name: Supermicro X9SCL/X9SCM/X9SCL/X9SCM, BIOS 4.6.4 06/30/2011
May  5 18:28:54 helisrv kernel: [64105.332917] task: ffff880095dd5180 ti: ffff8801e1e7c000 task.ti: ffff8801e1e7c000
May  5 18:28:54 helisrv kernel: [64105.332918] RIP: 0010:[<ffffffff81772047>]  [<ffffffff81772047>] _raw_spin_lock+0x37/0x50
May  5 18:28:54 helisrv kernel: [64105.332923] RSP: 0018:ffff8801e1e7fe40  EFLAGS: 00000206
May  5 18:28:54 helisrv kernel: [64105.332924] RAX: 00000000000027bd RBX: ffff8801c7c9b840 RCX: 00000000000088a0
May  5 18:28:54 helisrv kernel: [64105.332925] RDX: 000000000000889e RSI: 000000000000889e RDI: ffff8800366e95d0
May  5 18:28:54 helisrv kernel: [64105.332925] RBP: ffff8801e1e7fe40 R08: 00000000572b74ac R09: ffff8801e1e7fc3c
May  5 18:28:54 helisrv kernel: [64105.332926] R10: ffff8801e1e7fee2 R11: 0000000000000005 R12: ffff880221bda820
May  5 18:28:54 helisrv kernel: [64105.332927] R13: 0000000000000000 R14: 000000000000037e R15: 0000000400000001
May  5 18:28:54 helisrv kernel: [64105.332928] FS:  00007f1ffc165780(0000) GS:ffff88023fd80000(0000) knlGS:0000000000000000
May  5 18:28:54 helisrv kernel: [64105.332929] CS:  0010 DS: 0000 ES: 0000 CR0:0000000080050033
May  5 18:28:54 helisrv kernel: [64105.332930] CR2: 00007f89c6a71148 CR3: 0000000221f80000 CR4: 00000000000407e0
May  5 18:28:54 helisrv kernel: [64105.332931] Stack:
May  5 18:28:54 helisrv kernel: [64105.332932]  ffff8801e1e7fe60 ffffffff8170132c ffff8801a9942d00 ffff880221f2b840
May  5 18:28:54 helisrv kernel: [64105.332933]  ffff8801e1e7fea8 ffffffff81704143 ffffffff81cd3800 000000280000006e
May  5 18:28:54 helisrv kernel: [64105.332935]  ffff8801a9942d00 000000000000006e ffff8801e1e7fec0 00007ffcbe593630
May  5 18:28:54 helisrv kernel: [64105.332936] Call Trace:
May  5 18:28:54 helisrv kernel: [64105.332940]  [<ffffffff8170132c>] unix_state_double_lock+0x2c/0x70
May  5 18:28:54 helisrv kernel: [64105.332942]  [<ffffffff81704143>] unix_dgram_connect+0x93/0x250
May  5 18:28:54 helisrv kernel: [64105.332944]  [<ffffffff8164ca57>] SYSC_connect+0xe7/0x120
May  5 18:28:54 helisrv kernel: [64105.332947]  [<ffffffff811e7e0a>] ? SyS_fcntl+0x48a/0x610
May  5 18:28:54 helisrv kernel: [64105.332949]  [<ffffffff8164d75e>] SyS_connect+0xe/0x10
May  5 18:28:54 helisrv kernel: [64105.332951]  [<ffffffff8177258d>] system_call_fastpath+0x1a/0x1f
May  5 18:28:54 helisrv kernel: [64105.332952] Code: 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 00 00 eb 0c 0f 1f 44 00 00
 f3 90 83 e8 01 74 0a <0f> b7 0f 66 39 ca 75 f1 5d c3 66 66 66 90 66 66 90 eb da
 66 0f
May  5 18:29:22 helisrv kernel: [64133.355633] BUG: soft lockup - CPU#6 stuck for 22s! [smbd:22841]
[...]