Subject: kern/31993: FAT32 kernel crash
To: None <,,>
From: None <>
List: netbsd-bugs
Date: 11/03/2005 17:42:00
>Number:         31993
>Category:       kern
>Synopsis:       kernel panic with files > 4GB on FAT32
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Nov 03 17:42:00 +0000 2005
>Originator:     Zeljko Vrba
>Release:        NetBSD 2.0.2
	2 processors, HT disabled
System: NetBSD 2.0.2 NetBSD 2.0.2 (DMMSL-38) #10: Sun Aug 21 13:04:48 CEST 2005 i386
Architecture: i386
Machine: i386
I've used the p7zip archiver on FAT32 partition. When it tried to create a
large file (I guess > 4GB) the kernel panickeg with the follwoing message on
the console:

panic: deextend: file too large

and dropped into DDB. I tried to kill the offending process, with no
success (DDB just said "no such process", while it was clearly visible
in the ps listing. maybe it's impossible to kill the current process?)

p7zip is multithreaded, if it makes a difference.

Not sure. Maybe just creating a large file on FAT32 will reproduce the