copying a file to the device (using python shutil.copyfile) causes the labstation to reboot during the copy. I finally caught a stack trace in dmesg but there was no last_kmsg in /proc.

Full log coming:
[  +0.008541] sd 13:0:0:0: [sdh] Unhandled error code
[  +0.000011] sd 13:0:0:0: [sdh]  
[  +0.000007] Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK
[  +0.000008] sd 13:0:0:0: [sdh] CDB: 
[  +0.000006] Write(10): 2a 00 00 00 6b b0 00 00 f0 00
[  +0.000063] end_request: I/O error, dev sdh, sector 27568
[  +0.056277] usb 1-1.6.4.4: reset high-speed USB device number 26 using ehci-pci
[  +0.030048] usb 1-1.6.7.3: USB disconnect, device number 58
[  +0.000012] usb 1-1.6.7.3.1: USB disconnect, device number 65
[  +0.000209] google ttyUSB63: google converter now disconnected from ttyUSB63
[  +0.000038] usb_serial_simple 1-1.6.7.3.1:1.0: device disconnected
[  +0.000299] BUG: unable to handle kernel NULL pointer dereference at 0000000000000050
[  +0.000013] IP: [<ffffffff8f36bbc1>] bdi_writeback_workfn+0x38/0x2bb
[  +0.000012] PGD 0 
[  +0.000006] Oops: 0000 [#1] PREEMPT SMP 
[  +0.002228] gsmi: Log Shutdown Reason 0x03
[  +0.000006] Modules linked in: uinput i2c_dev rfcomm snd_hda_codec_realtek memc_x86 x86_pkg_temp_thermal snd_hda_codec_hdmi snd_hda_codec_generic snd_hda_intel snd_hda_control
ler snd_hda_codec snd_hwdep snd_soc_sst_acpi fuse zram usb_serial_simple ip6table_filter ip6_tables snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device iwlmvm r81
69 mii iwlwifi iwl7000_mac80211 cfg80211 btusb btbcm btintel bluetooth
[  +0.000073] CPU: 3 PID: 10998 Comm: kworker/u8:6 Tainted: G        W    3.14.0 #1
[  +0.000008] Hardware name: GOOGLE Guado, BIOS Google_Guado.6301.108.2016_10_06_1219 10/06/2016
[  +0.000011] Workqueue: writeback bdi_writeback_workfn
[  +0.000003] google ttyUSB64: google converter now disconnected from ttyUSB64

[  +0.000013] task: ffff880160f9f6a0 ti: ffff880167596000 task.ti: ffff880167596000
[  +0.000008] RIP: 0010:[<ffffffff8f36bbc1>]  [<ffffffff8f36bbc1>] bdi_writeback_workfn+0x38/0x2bb
[  +0.000009] usb_serial_simple 1-1.6.7.3.1:1.3: device disconnected
[  +0.000009] RSP: 0018:ffff880167597d98  EFLAGS: 00010246
[  +0.000007] RAX: 0000000000000000 RBX: ffff8800784ce628 RCX: ffff88017a06b828
[  +0.000007] RDX: 0000000000000000 RSI: 0000000000000100 RDI: ffff8800784ce628
[  +0.000008] RBP: ffff880167597e20 R08: ffff880167596000 R09: 000000000000b4dc
[  +0.000007] R10: 0000000000000000 R11: ffff8800658d8000 R12: ffff8800784ce450
[  +0.000007] R13: ffff88017a06b800 R14: 0000000000000000 R15: ffff8800784ce610
[  +0.000008] FS:  0000000000000000(0000) GS:ffff88017ed80000(0000) knlGS:0000000000000000
[  +0.000008] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  +0.000007] CR2: 0000000000000050 CR3: 0000000052da0000 CR4: 00000000003407e0
[  +0.000007]  ffff880167597de8 ffffffff8f2012f2 000000007ed92480 ffff8800658d8000
[  +0.000020]  ffff880167597dc8 ffffffff8f81141c ffff880167597df8 ffffffff8f284a46
[  +0.000010]  ffff88017ed92480 ffff880062814b40 ffff88017ed92480 0000000093d25c7e
[  +0.000011] Call Trace:
[  +0.000009]  [<ffffffff8f2012f2>] ? __switch_to+0x1cc/0x3f3
[  +0.000009]  [<ffffffff8f81141c>] ? _raw_spin_unlock_irq+0xe/0x22
[  +0.000009]  [<ffffffff8f284a46>] ? finish_task_switch+0x5b/0xba
[  +0.000010]  [<ffffffff8f2756df>] process_one_work+0x187/0x2d0
[  +0.000008]  [<ffffffff8f2763b2>] worker_thread+0x143/0x202
[  +0.000011]  [<ffffffff8f27626f>] ? rescuer_thread+0x2c3/0x2c3
[  +0.000009]  [<ffffffff8f27b388>] kthread+0x108/0x110
[  +0.000009]  [<ffffffff8f27b280>] ? __kthread_parkme+0x67/0x67
[  +0.000009]  [<ffffffff8f8123ac>] ret_from_fork+0x7c/0xb0
[  +0.000009]  [<ffffffff8f27b280>] ? __kthread_parkme+0x67/0x67
[  +0.000006] Code: 41 55 41 54 
[  +0.000010] google ttyUSB65: google converter now disconnected from ttyUSB65
[  +0.000007] 4c 
[  +0.000004] 8d 7f e8 53 48 89 fb 48 83 ec 60 4c 8b 
[  +0.000018] usb_serial_simple 1-1.6.7.3.1:1.4: device disconnected
[  +0.000002] 67 e8 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 49 8b 84 24 c8 02 00 00 <48> 8b 70 50 48 85 f6 75 04 48 8b 70 10 31 c0 48 c7 c7 06 6f b8 
[  +0.000060] RIP  [<ffffffff8f36bbc1>] bdi_writeback_workfn+0x38/0x2bb
[  +0.000011]  RSP <ffff880167597d98>
[  +0.000005] CR2: 0000000000000050
[  +0.000006] ---[ end trace 3cb13b191d40b9fa ]---
[  +0.002461] usb 1-1.6.7.3.3: USB disconnect, device number 66
packet_write_wait: Connection to 100.115.172.1 port 22: Broken pipe