Thread (2 messages) 2 messages, 2 authors, 1998-06-17

(fwd) linux SEGV details

From: Ariel Faigon <hidden>
Date: 1998-06-17 15:43:42

[forwarding bounced message from non subscriber]

----- Forwarded message from owner-linux@cthulhu -----
To: adelton@informatics.muni.cz (Honza Pazdziora)
Date: Wed, 17 Jun 1998 09:18:17 +0200 (MET DST)
Cc: adevries@engsoc.carleton.ca, adelton@informatics.muni.cz,
        linux@cthulhu.engr.sgi.com
X-Mailer: ELM [version 2.4ME+ PL39 (25)]

Honza Pazdziora wrote:
quoted
Do you mean that mkswap segfaulted during install, or after?  I'll have a
closer look.  The util-linux we're using is a little old.
It segfault during install _and_ after install when we tried to set up
swap space manualy.
I'm not sure what happened during install -- I just wanted to have it
done to see the real prompt ;-) But when I tried mkswap /dev/sdb2 on
the prompt, it said something about freeing free buffer? (or whatever)
and then gave register dump. Sorry, I'm at home and can't get to the
machine because sshd isn't running there yet, so I will send the exact
output tomorrow.
Honza is not yet here, so there is the output:

#mkswap /dev/sdb2
Segmentation fault
#

and on console (there is no syslogd :( ) is:

#dmesg
[...skipped...]
VFS: brelse: Trying to free free buffer
Unable to handle kernel paging request at virtual address 00050040,
epc == 88041e7c, ra == 880464e0
Oops: 0000
$0 : 00000000 88140000 00000028 00000009
$4 : 00050028 00000001 bf0f0000 00000000
$8 : 00000720 00000000 00000000 00000000
$12: 00000008 000003e2 8836e59c 7ffffcf0
$16: 00050028 894c7c88 894c7d80 00000001
$20: 00000000 00000000 894c7c80 00000000
$24: 00000001 7ffffcf1
$28: 894c6000 894c7c58 00000000 880464e0
epc   : 88041e7c
Status: 3000fc03
Cause : 00000008


[and just another attempt to mkswap...]
VFS: brelse: Trying to free free buffer
Unable to handle kernel paging request at virtual address 00050040,
epc == 88041e7c, ra == 880464e0
Oops: 0000
$0 : 00000000 88140000 00000028 00000009
$4 : 00050028 00000001 bf0f0000 00000000
$8 : 00000720 00000000 00000000 00000000
$12: 00000008 000003e2 8836e59c 7ffffcf0
$16: 00050028 894c7c88 894c7d80 00000001
$20: 00000000 00000000 894c7c80 00000000
$24: 00000001 7ffffcf1
$28: 894c6000 894c7c58 00000000 880464e0
epc   : 88041e7c
Status: 3000fc03
Cause : 00000008

The same with recompiled mkswap.

Hope it helps.

I tried to compile our (international) ssh, but it ends with "not
enough memory" :( This indy has 32MB ram, maybe I will shut down our
web server and boot linux there, it has little bit more RAM and is
faster...
No, that's not goot idea :-(

david kostal (kron@fi.muni.cz)
----+
----- End of forwarded message from owner-linux@cthulhu -----

-- 
Peace, Ariel
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