Subject: port-i386/4495: PCVT can cause a kernel to halt
To: None <>
From: None <>
List: netbsd-bugs
Date: 11/15/1997 11:16:52
>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
>Release:        has existed for many versions
System: NetBSD 1.3_ALPHA NetBSD 1.3_ALPHA (CUSTOM) #0: Thu Nov 13 19:24:39 EST 1997 i386

	If you have a kernel compiled with PCVT you can easially halt your system.
	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.
	Don't know.  However, I think limiting the possible values that PCVT gets to change terminals would be a way.