On Sun, Dec 10, 2006 at 11:30:00AM +0000, jfranz@bsdprojects.net wrote:
> >Number:         35226
> >Category:       kern
> >Synopsis:       Problems with permissions in /usr/pkg/emul/linux/proc .
[...]
> >Arrival-Date:   Sun Dec 10 11:30:00 +0000 2006
> >Originator:     Johann Franz
> >Release:        NetBSD 4.0_BETA2 of 2006/12/09
> >Organization:
> >Environment:
> System: NetBSD trillian 4.0_BETA2 NetBSD 4.0_BETA2 (TRILLIAN) #4: Sun Dec 10 11:18:47 CET 2006  jf@trillian:/usr/obj/sys/arch/i386/compile/TRILLIAN i386
> Architecture: i386
> Machine: i386
> >Description:
> Since 4.0 BETA2 I'm having problems with linux emulation and procfs that other users on IRC approved. 
> A normal user can't access essential files in /usr/pkg/emul/linux/procfs, which may be the reason for some linux-emulated programs not working.
> An earlier checkout of BETA2 a few days ago even didn't let a normal user do ls /usr/pkg/emul/linux/procfs at all.
> >How-To-Repeat:
> # mount -t procfs -o rw,linux procfs /usr/pkg/emul/linux/procfs
> $ cat /usr/pkg/emul/linux/procfs/cpuinfo

Same here, on -current.

njoly@cixy [~]> uname -a
NetBSD cixy.dial.pasteur.fr 4.99.5 NetBSD 4.99.5 (CIXY) #39: Sat Dec  9 18:11:44 CET 2006  njoly@cixy.dial.pasteur.fr:/local/src/NetBSD/obj/i386/sys/arch/i386/compile/CIXY i386
njoly@cixy [~]> cat /emul/linux/proc/cpuinfo 
cat: /emul/linux/proc/cpuinfo: Operation not permitted

I tracked down to `procfs_rw()' (sys/miscfs/procfs/procfs_subr.c)
where 'kauth_authorize_process()' call return a non-zero value.

-- 
Nicolas Joly

Biological Software and Databanks.
Institut Pasteur, Paris.