Chrome Version: 58.0.3029.19
OS:9334.13.0 (Official Build) dev-channel kip
Firmware: Google_Kip.5216.227.78

What steps will reproduce the problem?
(1)Sign into Device
(2)Plug in 2 USB sticks (with partitions and make sure all the partitions are mounted) 
(3)Reboot the device & Sign in
(4)Now Eject the USB partitions and unplug the sticks

What is the expected result?
No screen freeze or crash should be seen

What happens instead?
Screen frozen and Kernel and Browser crash seen 1/4 times

Please use labels and text to provide additional information.
1. Unable to come out of the frozen screen.  Tried to 'Power off the device' but didn't work.
2. So tried ESC+Refresh+Power keys and then Power OFF and Power ON to bring the system up. 

Crash links:
Kernel: https://crash.corp.google.com/browse?stbtiq=dd21926640000000
Browser: https://crash.corp.google.com/browse?stbtiq=c7084a1660000000
Browser: https://crash.corp.google.com/browse?stbtiq=7704f21660000000

For graphics-related bugs, please copy/paste the contents of the about:gpu
page at the end of this report.