kern/62468: system crashes when serial getty enabled and serial port disabled in BIOS

[Bjoern Engels]

>Number:         62468
>Category:       kern
>Synopsis:       system crashes when serial getty enabled and serial port disabled in BIOS
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sat Feb 07 01:00:40 PST 2004
>Closed-Date:
>Last-Modified:
>Originator:     Bjoern Engels
>Release:        FreeBSD 5.2-RELEASE-p2 i386
>Organization:
>Environment:
System: FreeBSD www.nacktadministrieren.de 5.2-RELEASE-p2 FreeBSD 5.2-RELEASE-p2 #0: Fri Feb 6 22:01:44 CET 2004 root at www.nacktadministrieren.de:/usr/obj/usr/src/sys/NADE_ULE i386


>Description:
When gettys are enabled to listen on ttyd* and one of the serial ports
is disabled in BIOS, the system crashes immediately after booting.

>How-To-Repeat:
Enable the following lines in /etc/ttys:
ttyd0   "/usr/libexec/getty std.9600"   dialup  on secure
ttyd1   "/usr/libexec/getty std.9600"   dialup  on secure

Reboot the machine and disable the first serial Port in
BIOS configuration. Boot the machine. Wait for crash.

>Fix:
Disable getty on ttyd or re-enable serial port in BIOS.

>Release-Note:
>Audit-Trail:
>Unformatted: