kern/38531: mmap(2) on ntfs should return MAP_FAILED but doesn't

[j+nbsd%2008.salmi.ch@localhost]

>Number:         38531
>Category:       kern
>Synopsis:       mmap(2) on ntfs should return MAP_FAILED but doesn't
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Apr 28 08:55:00 +0000 2008
>Originator:     Jukka Salmi
>Release:        NetBSD 4.99.60
>Environment:
System: NetBSD moray.salmi.ch 4.99.60 NetBSD 4.99.60 (MORAY.APM) #0: Mon Apr 21 
20:50:44 CEST 2008 
build%moray.salmi.ch@localhost:/b/build/nbsd/c/i386/sys/arch/i386/compile/MORAY.APM
 i386
Architecture: i386
Machine: i386
>Description:
mmap(2) on ntfs should return MAP_FAILED but it doesn't.

>How-To-Repeat:
$ mount
[...]
/dev/wd0n on /mnt/win type ntfs (read-only, local)
$ ls -l /mnt/win/BOOT.INI
-rwxr-xr-x  1 root  wheel  194 Sep 18  2006 /mnt/win/BOOT.INI
$ cp /mnt/win/BOOT.INI .
cp: ./BOOT.INI: Invalid argument

Tracing cp(1) shows:
[...]
   615      1 cp       CALL  open(0xbb907c00,0,0)
   615      1 cp       NAMI  "/mnt/win/BOOT.INI"
   615      1 cp       RET   open 3
   615      1 cp       CALL  open(0x804b208,0x601,0x81ed)
   615      1 cp       NAMI  "./BOOT.INI"
   615      1 cp       RET   open 4
   615      1 cp       CALL  mmap(0,0xc2,1,1,3,0,0,0)
   615      1 cp       RET   mmap -1146105856/0xbbafd000
   615      1 cp       CALL  madvise(0xbbafd000,0xc2,2)
   615      1 cp       RET   madvise 0
   615      1 cp       CALL  write(4,0xbbafd000,0xc2)
   615      1 cp       RET   write -1 errno 22 Invalid argument
[...]

>Fix: