[   13.020266] divide error: 0000 [#1] PREEMPT SMP 
[   13.022860] Modules linked in: iscsi_ibft iscsi_boot_sysfs dm_mod
snd_hda_codec_hdmi nls_iso8859_1 nls_cp437 vfat fat snd_hda_intel
snd_hda_controller snd_hda_codec intel_powerclamp coretemp igb kvm_intel
snd_hda_core snd_hwdep iTCO_wdt iTCO_vendor_support snd_pcm kvm ir_lirc_codec
ptp ir_xmp_decoder lirc_dev ir_sharp_decoder ir_mce_kbd_decoder
ir_sanyo_decoder ir_jvc_decoder ir_sony_decoder crct10dif_pclmul ir_rc6_decoder
ir_nec_decoder pps_core dca snd_timer ir_rc5_decoder crc32_pclmul snd cryptd
rc_rc6_mce i2c_i801 pwm_lpss_pci pcspkr soundcore fintek_cir rc_core battery
8250_fintek rfkill_gpio i2c_hid rfkill thermal lpc_ich mfd_core mei_txe fan mei
dw_dmac_pci 8250_dw shpchp i2c_designware_pci i2c_designware_platform
pwm_lpss_platform pwm_lpss i2c_designware_core dw_dmac_core processor efivarfs
[   13.032036]  hid_generic usbhid btrfs xor uas usb_storage raid6_pq raid1
md_mod crc32c_intel i915 i2c_algo_bit drm_kms_helper xhci_pci xhci_hcd usbcore
usb_common sdhci_pci drm sdhci_acpi video sdhci mmc_core button sg
[   13.038495] CPU: 2 PID: 1018 Comm: ModemManager Not tainted 4.1.15-8-default
#1
[   13.041770] Hardware name: To be filled by O.E.M. To be filled by
O.E.M./Aptio CRB, BIOS 5.6.5 05/19/2014
[   13.045097] task: ffff880231f62150 ti: ffff8800b882c000 task.ti:
ffff8800b882c000
[   13.048447] RIP: 0010:[<ffffffff81456d7c>]  [<ffffffff81456d7c>]
byt_set_termios+0x3c/0xb0
[   13.051821] RSP: 0018:ffff8800b882fbf8  EFLAGS: 00010246
[   13.055136] RAX: 0000000005f5e100 RBX: 0000000000000001 RCX:
00000000ffffffff
[   13.058435] RDX: 0000000000000000 RSI: ffff88022d3dc530 RDI:
ffff88022d3dc530
[   13.061707] RBP: ffffffff82200860 R08: 0000000000000000 R09:
ffff8800b882fc00
[   13.064997] R10: 00007fff8d6dcdb0 R11: 0000000000000202 R12:
ffff8800b882fc94
[   13.068301] R13: ffff88022d3dc530 R14: ffff880233e08770 R15:
0000000000000064
[   13.071601] FS:  00007f31d4734840(0000) GS:ffff88023fd00000(0000)
knlGS:0000000000000000
[   13.071603] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   13.071608] CR2: 00007f31d173f2c4 CR3: 00000000b881f000 CR4:
00000000001006e0
[   13.071610] Stack:
[   13.071613]  0000000000002400 0000000100003d09 ffff88003f914f10
ffffffff82200860
[   13.071616]  ffff88022d3dc400 ffffffff82200860 ffff880233e08660
ffffffff8144d0ec
[   13.071618]  ffff88022d3dc400 ffff8800b882fc94 ffffffff82200860
ffffffff8144f8bf
[   13.071619] Call Trace:
[   13.071634]  [<ffffffff8144d0ec>] uart_change_speed.isra.13+0x3c/0x100
[   13.071639]  [<ffffffff8144f8bf>] uart_set_termios+0x7f/0x1b0
[   13.071644]  [<ffffffff81435dfc>] tty_set_termios+0x1bc/0x290
[   13.071648]  [<ffffffff8143631f>] set_termios+0x15f/0x260
[   13.071653]  [<ffffffff81436730>] tty_mode_ioctl+0x2c0/0x550
[   13.071657]  [<ffffffff8142fdbe>] tty_ioctl+0x23e/0xc70
[   13.071662]  [<ffffffff811f0f8f>] do_vfs_ioctl+0x2ff/0x510
[   13.071675]  [<ffffffff811f1221>] SyS_ioctl+0x81/0xa0
[   13.071680]  [<ffffffff8165feb2>] system_call_fastpath+0x16/0x75
[   13.071704]  [<00007f31d28bd316>] 0x7f31d28bd316
[   13.071726] Code: 89 fd 48 89 f7 53 bb 01 00 00 00 48 83 ec 18 e8 9b e9 fd
ff c1 e0 04 31 d2 b9 ff ff ff ff 41 89 c0 b8 00 e1 f5 05 4c 8d 4c 24 08 <49> f7
f0 48 0f bd c8 48 d3 e3 ba ff 7f 00 00 b9 ff 7f 00 00 be 
[   13.071730] RIP  [<ffffffff81456d7c>] byt_set_termios+0x3c/0xb0
[   13.071730]  RSP <ffff8800b882fbf8>
[   13.071768] ---[ end trace 21066a29bd8aacd5 ]---