i386/125843: [boot] 'load' followed by 'boot' of missing file causes panic

[Bruce Cran]

>Number:         125843
>Category:       i386
>Synopsis:       [boot] 'load' followed by 'boot' of missing file causes panic
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jul 21 21:50:11 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     Bruce Cran
>Release:        7.0-p1
>Organization:
>Environment:
FreeBSD gluon.draftnet 7.0-RELEASE-p1 FreeBSD 7.0-RELEASE-p1 #0: Sat May 17 22:56:30 BST 2008     brucec at gluon.draftnet:/usr/obj/usr/src/sys/GENERIC  i386
>Description:
Trying to load _or_ boot a missing kernel results in the message "can't find <name>".  However, if you try to "load" then "boot" the missing file or vice versa the system panics:

OK load abc
can't find 'abc'
OK boot abc
Consoles: internal video/keyboard
BIOS drive A: is disk0
BIOS drive C: is disk1
BIOS drive D: is disk2
BIOS drive E: is disk3
BIOS 639kB/1047488kB available memory

FreeBSD/i386 bootstrap loader, Revision 1.1
(brucec at gluon.draftnet, Thu May 8 21:54:48 BST 2008)
Can't work out which disk we are booting from.
Guessed BIOS device 0xffffffff not found by probes, defaulting to disk0:

panic: free: guard1 fail @ 0x5c4ec from /usr/src/sys/boot/i386/loader/../../common/module.c:959
--> Press a key on the console to reboot <--
>How-To-Repeat:

>Fix:


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