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Date: Sun, 31 Aug 2008 08:49:00 GMT
From: Ivan Angelov <i.angelov@developers.bg>
To: freebsd-gnats-submit@FreeBSD.org
Subject: Kernel panic
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>Number:         126997
>Category:       kern
>Synopsis:       [panic] Kernel panic
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    gavin
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Aug 31 08:50:08 UTC 2008
>Closed-Date:    Thu Nov 06 14:25:01 UTC 2008
>Last-Modified:  Thu Nov 06 14:25:01 UTC 2008
>Originator:     Ivan Angelov
>Release:        7.0-RELEASE
>Organization:
>Environment:
FreeBSD Iram.local 7.0-RELEASE-p3 FreeBSD 7.0-RELEASE-p3 #0: Mon Aug 25 21:01:09 EEST 2008     root@Iram.local:/usr/obj/usr/src/sys/Iram  i386
>Description:
Panicking randomly. Core dumps present at http://cont.se7h.net/files/kd/
(fbsd/fbsd for auth).
>How-To-Repeat:
I'm not sure, but I think it happened after compiling usb support in the
kernel (for an APC Smart UPS) - the only change I made to the kernel
between installing the server and starting to panic; after already having
the problem, I changed the scheduler to ULE - and the problem remains
open). Please, feel free to contact me if needed, I am submitting a PR
for first time and unsure how to do it properly. 
>Fix:


>Release-Note:
>Audit-Trail:
State-Changed-From-To: open->feedback 
State-Changed-By: gavin 
State-Changed-When: Wed Sep 3 20:59:12 UTC 2008 
State-Changed-Why:  
To submitter:  Sadly, because you have recompiled your kernel, the core 
dumps are very hard to analyse anywhere but on your own system. 
However, it's not hard for you to get the basic information we will 
need: 
- Make sure you have the same sources in /usr/src as the kernel was 
compiled with (recompile if necessary) 
- Make sure the kernel was compiled with "makeoptions DEBUG=-g" in 
the kernel config file (I believe it's default) 
- Make sure you are running with the above kernel, and wait for a 
panic 
- On the core dump produced, run: 
kgdb /usr/obj/usr/src/sys/GENERIC/kernel.debug /var/crash/vmcore.X 
(replacing GENERIC with the name of your kernel, and vmcore.X with 
the most recent core dump) 
- When in kgdb, run "bt", and reply-all to this email with the backtrrace 

Finally: FreeBSD PRs are public, and kernel core dumps may well contain 
sensitive information such as passwords etc, as they are a full dump 
of the computer's memory at the time it crashed.  Therefore it's 
probably a good idea for you to remove the core files you've made 
accessible.  If a FreeBSD developer needs them, you can share them 
privately. 


Responsible-Changed-From-To: freebsd-bugs->gavin 
Responsible-Changed-By: gavin 
Responsible-Changed-When: Wed Sep 3 20:59:12 UTC 2008 
Responsible-Changed-Why:  
Track 

http://www.freebsd.org/cgi/query-pr.cgi?pr=126997 
State-Changed-From-To: feedback->closed 
State-Changed-By: gavin 
State-Changed-When: Thu Nov 6 14:20:51 UTC 2008 
State-Changed-Why:  
Feedback timeout (2 months).  To submitter: if you can get the 
requested information then we can reopen this PR and may well 
be able to resolve it easily.  Without extra information, however, 
there is nothing that can really be done with this report.  Sorry! 

http://www.freebsd.org/cgi/query-pr.cgi?pr=126997 
>Unformatted:
