>Number:         4495
>Category:       port-i386
>Synopsis:       PCVT can cause a kernel to halt
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    gnats-admin (GNATS administrator)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Nov 15 08:20:03 1997
>Last-Modified:
>Originator:     
>Organization:
>Release:        has existed for many versions
>Environment:
System: NetBSD master.ibmcyrix.org 1.3_ALPHA NetBSD 1.3_ALPHA (CUSTOM) #0: Thu Nov 13 19:24:39 EST 1997 101@master.ibmcyrix.org:/usr/src/sys/arch/i386/compile/CUSTOM i386


>Description:
	If you have a kernel compiled with PCVT you can easially halt your system.
>How-To-Repeat:
	Easy. Compile a kernel (I assume this is limited to i386 unless PCVT is compiled on other platforms) with PCVT support instead of the pccons driver.  Boot off it.  Hit ctrl-alt-esc. The result will show on ttyv0.
>Fix:
	Don't know.  However, I think limiting the possible values that PCVT gets to change terminals would be a way.
>Audit-Trail:
>Unformatted: