Date: Fri, 21 Jul 1995 10:17:53 +0200 (MET DST) From: Thomas Graichen <graichen@omega.physik.fu-berlin.de> To: bugs@freebsd.org Subject: 3 ways to crash FreeBSD (2.0.5 and 950412-SNAP) Message-ID: <9507210817.AA25956@omega.physik.fu-berlin.de>
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hello - here are my 3 ways to crash FreeBSD:
* simply hit ctrl-alt-del while booting multiple times -> at the probes of the
floppies and/or the wd drives the system stops with a panic (i'va also managed
it to panic the system TWICE at once) - this is total reproducable - if it
is'nt for you - please send me a mail and i'll give you any more information
you need (this happens on 950412-SNAP and 2.0.5 RELEASE)
* simply do the following as root at the console:
modload -u -o /tmp/saver_mod -e saver_init -q /lkm/${saver}_saver_mod.o
modload -u -o /tmp/saver_mod -e saver_init -q /lkm/${saver}_saver_mod.o
(this will giva an error)
modunload -n star_saver
this is also total reproducable on 950412-SNAP and 2.0.5 RELEASE and leads
also to a kernel panic
* the last is a problem i have since the early january SNAP's - this is what
i've written some times before to jordan:
the system crashes then i log in (but couriously not if somebody else or
root does this) via xdm - /var/log/messages says
Feb 9 10:49:44 julia /vmunix: Error in getattr: 70
Feb 9 10:49:45 julia /vmunix:
Feb 9 10:49:45 julia /vmunix:
Feb 9 10:49:45 julia /vmunix: Fatal trap 12: page fault while in kernel mode
Feb 9 10:49:45 julia /vmunix: fault virtual address = 0x40
Feb 9 10:49:45 julia /vmunix: fault code = supervisor read,
page not present
Feb 9 10:49:45 julia /vmunix: instruction pointer = 0x8:0xf0125b1b
Feb 9 10:49:45 julia /vmunix: code segment = base 0x0, limit
0xffff
f, type 0x1b
Feb 9 10:49:45 julia /vmunix: = DPL 0, pres 1, def32 1, gran1
Feb 9 10:49:45 julia /vmunix: processor eflags = interrupt enabled, resume,
IOPL = 0
Feb 9 10:49:45 julia /vmunix: current process = 122 (xdm)
Feb 9 10:49:45 julia /vmunix: interrupt mask =
Feb 9 10:49:46 julia /vmunix: panic: page fault
Feb 9 10:49:46 julia /vmunix:
Feb 9 10:49:46 julia /vmunix: syncing disks... 28 28 25 21 16 10 1 done
its absolutely reproducable: reboot - xdm is started - i try to login - the
xdm login window disappears - i here the disk writing the coredump - but the
problem did'nt appear if somebody else logs in (who has his homedirectory on
another machine - but both dec alpha's osf/1 3.0 - we are mounting the
homedirs via amd with nfs) - my nfs-homedir-server says:
Feb 9 10:45:48 sirius vmunix: NFS server: stale file handle fs(8,2054) file
116839 gen 792314558
Feb 9 10:45:48 sirius vmunix: getattr, client address = 130.133.3.235, errno
22
it only happens sometimes - but if - it will happen at any try to login after
the system has rebooted after that panic - loging in as root and doing a "su -
myusername" then logout and login as me works then - if you need any more
information - please send a mail to me (by the way - we have some problems
with our net - because our net-segment is too long - but this should
max. result in an but not in an kernel panic!)
* and one last thing:
we mount all our homedir's via amd - which mounts them if they are needed
(user logs in) and tries to unmount them automatic if they are no longer used
- but FreeBSD seems to loose the directories from time to time - that means
the directory will be mounted again and again (this way i sometimes get 20
times the same dir mounted) - and after each of these overmountings i get an
"getting cwd failed" from my tcsh (because the directory is new ... mounted) -
do you have any ideas ?
to all the points above - i'll try to give you all the information you need
and as far as i can all the help i may give you - thanks in advance - t
_______________________________________________________||_____________________
__||
Perfection is reached, not when there is no __|| thomas graichen
longer anything to add, but when there __|| freie universitaet berlin
is no longer anything to take away __|| fachbereich physik
__||
- Antoine de Saint-Exupery - __||
___________________________||____email: graichen@omega.physik.fu-berlin.de____
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