cvs commit: src/sys/kern vfs_subr.c src/sys/fs/devfs devfs_vnops.c

[Simon L. Nielsen]

On 2005.11.10 14:04:06 +0100, Gordon Bergling wrote:
> Hi,
> 
> * Thus spake Doug White (dwhite at FreeBSD.org):
> > dwhite      2005-11-09 22:03:50 UTC
> > 
> >   FreeBSD src repository
> > 
> >   Modified files:
> >     sys/kern             vfs_subr.c 
> >     sys/fs/devfs         devfs_vnops.c 
> >   Log:
> >   This is a workaround for a complicated issue involving VFS cookies and devfs.
> >   The PR and patch have the details. The ultimate fix requires architectural
> >   changes and clarifications to the VFS API, but this will prevent the system
> >   from panicking when someone does "ls /dev" while running in a shell under the
> >   linuxulator.
> >   
> >   This issue affects HEAD and RELENG_6 only.
> >   
> >   PR:             88249
> >   Submitted by:   "Devon H. O'Dell" <dodell at ixsystems.com>
> >   MFC after:      3 days
> >   
> >   Revision  Changes    Path
> >   1.128     +24 -0     src/sys/fs/devfs/devfs_vnops.c
> >   1.652     +4 -0      src/sys/kern/vfs_subr.c
> 
> Could this be MFC'ed to RELENG_6_0, too? I think its also a security
> risk on shell servers, where linux emulation is installed and the server
> runs 6.0-RELEASE.

How is it a security risk?  Because local users can panic the system
or are there more significant risks?

Note: We do not issue Security Advisories for local DoS
vulnerabilities, but it could be MFC'ed as an errata, but it requires
that the change has been in RELENG_6 for a while before that can be
done.

-- 
Simon L. Nielsen
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