NetBSD Problem Report #31994

From zvrba@dmms-lab38.ifi.uio.no  Thu Nov  3 17:47:01 2005
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Date: Thu, 3 Nov 2005 18:46:56 +0100 (CET)
From: zvrba@ifi.uio.no
Reply-To: zvrba@ifi.uio.no
To: gnats-bugs@netbsd.org
Subject: kernel panic, probably msdosfs
X-Send-Pr-Version: 3.95

>Number:         31994
>Category:       kern
>Synopsis:       kernel panic, probably msdosfs
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    kern-bug-people
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Nov 03 17:48:00 +0000 2005
>Closed-Date:    Tue May 28 07:04:53 +0000 2019
>Last-Modified:  Tue May 28 07:04:53 +0000 2019
>Originator:     Zeljko Vrba
>Release:        NetBSD 2.0.2
>Organization:
IFI-UiO
>Environment:
	2 CPU system, HT disabled
System: NetBSD dmms-lab38.ifi.uio.no 2.0.2 NetBSD 2.0.2 (DMMSL-38) #10: Sun Aug 21 13:04:48 CEST 2005 root@dmms-lab38.ifi.uio.no:/usr/src/sys/arch/i386/compile/DMMSL-38 i386
Architecture: i386
Machine: i386
>Description:
So the scenario is following:

- become root, mount FAT32 partition
- cd to that partition

I was playing a bit with the p7zip archiver, which is multithreaded and due to
some command-line options ran out of memory, but with a very strange message
(invalid argument to system call).

Then I tried to ktrace it to see which system call is at fault, and the machine
froze on me. Crashed HARD. Today when I came to work I saw the following thing
on the console:

uvm_fault(0xd72a3c0c, 0, 0, 1) -> 0xe

As for kernel DDB, I have these options in the kernel:
options         DDB             # in-kernel debugger
options         DDB_ONPANIC=1   # see also sysctl(8): `ddb.onpanic'

DDB didn't start. I could do just hard reset.

>How-To-Repeat:
Not sure. I'm using p7zip from the pkgsrc. I copied the following line from
the manual page:

7za a -t7z -m0=lzma -mx=9 -mfb=64 -md=32m -ms=on archive.7z dir1

Added ktrace in front, replaced -md=32m with some higher numbers. Eventually,
I think that it crashed with -md=64m. Everything was done on FAT32 partition,
and dir1 had about 80G of data.

>Fix:
Unknown.

>Release-Note:

>Audit-Trail:

State-Changed-From-To: open->closed
State-Changed-By: maya@NetBSD.org
State-Changed-When: Tue, 28 May 2019 07:04:53 +0000
State-Changed-Why:
insufficient information to act upon, but bug old enough that asking for more information would be absurd.
sorry your bug was not addressed at the time. the issue might've been fixed in the meantime.


>Unformatted:

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