Bug 20382

Summary: Panic when trying to mount non-fixated CD
Product: Base System Reporter: Przemyslaw Frasunek <venglin>
Component: kernAssignee: Søren Schmidt <sos>
Status: Closed FIXED    
Severity: Affects Only Me    
Priority: Normal    
Version: 4.1-STABLE   
Hardware: Any   
OS: Any   

Description Przemyslaw Frasunek 2000-08-03 15:50:01 UTC 
	Kernel panics, when trying to mount written, but non-fixated CD-ROM.

Fix: 

Unknown.
How-To-Repeat: 
	1. Burn CD-R without fixate command.
	2. Leave CD in recorder (CDROMs usually doesn't read non-fixated CDs
	   at all)
	3. Mount it.
	4. Panic (page fault).
Comment 1 Sheldon Hearn freebsd_committer freebsd_triage 2000-08-04 10:09:33 UTC 
State Changed
From-To: open->feedback

Could you get a backtrace with debugging symbols?  You'll 
need a debugging kernel (``makeoptions DEBUG=-g'' in the 
kernel config file and config'd with config -g). 

Once you have one, have a look at the instructions at: 

http://www.freebsd.org/handbook/kerneldebug.html 

Be sure to send your follow-up to 
<freebsd-gnats-submit@freebsd.org>, preserving the Subject 
line of this e-mail message.
Comment 2 alex 2000-08-13 14:42:41 UTC 
> 	Kernel panics, when trying to mount written, but non-fixated CD-ROM.

Similar (probably related error):

kern/19127

Alex

-- 
cat: /home/alex/.sig: No such file or directory
Comment 3 Sheldon Hearn 2000-08-14 11:29:15 UTC 
On Sun, 13 Aug 2000 06:50:05 MST, Alexander Langer wrote:

>  > 	Kernel panics, when trying to mount written, but non-fixated CD-ROM.
>  
>  Similar (probably related error):
>  
>  kern/19127

Your backtrace doesn't include debugging symbols.  I'm pretty sure that
we could ask Soren to look at this, but I think he'll need a backtrace
with debugging symbols.

Perhaps you could provide this? :-)

Ciao,
Sheldon.
Comment 4 alex 2000-08-18 12:38:19 UTC 
Thus spake Sheldon Hearn (sheldonh@uunet.co.za):

> we could ask Soren to look at this, but I think he'll need a backtrace
> with debugging symbols.
> Perhaps you could provide this? :-)

No, I've deleted the dumpfile (I had little hdd space in the
meanwhile)

OTOH, I don't understand, why it didn't include the debugging symbols,
since that kernel was build with them and not stripped.

(or was it? :)

Alex
-- 
cat: /home/alex/.sig: No such file or directory
Comment 5 Sheldon Hearn freebsd_committer freebsd_triage 2000-08-18 12:44:10 UTC 
State Changed
From-To: feedback->open

Unfortunately, the originator has already smoked his 
crash dump.
Comment 6 Sheldon Hearn freebsd_committer freebsd_triage 2000-08-18 12:44:10 UTC 
Responsible Changed
From-To: freebsd-bugs->sos

Soren, I can't think of anyone else better able to look 
at this one than you.  If there isn't enough to go on in 
here, you can just close the PR. 

How many blank CD's can you trash? ;-)
Comment 7 Søren Schmidt freebsd_committer freebsd_triage 2000-11-14 08:50:49 UTC 
State Changed
From-To: open->closed

Some of this is solved in 4.2, the cd9660 filesys code is still 
fragile if you give it bogus filesystems though.