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kern/51079: Accessing unconfigured cgd causes panic

>Number:         51079
>Category:       kern
>Synopsis:       Accessing unconfigured cgd causes panic
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Apr 20 21:40:00 +0000 2016
>Originator:     John Klos
>Release:        NetBSD 7.99.26
System: NetBSD 7.99.26 NetBSD 7.99.26 (GENERIC.201603151930Z) amd64
Architecture: x86_64
Machine: amd64
Use cgdconfig to configure a cgd device, then cgdconfig -u that device.
Accidentally try to access that unconfigured cgd device (disklabel cgd0, for
instance), and the machine panics.
Was not able to get a picture of the screen before reboot, but it said something about
a divide by zero error.
See Description.
Not know.


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