Bug 747965

Summary:	incorrect permission on /dev/dri/control nodes.
Product:	Red Hat Enterprise Linux 6	Reporter:	Dave Airlie <airlied>
Component:	libdrm	Assignee:	Dave Airlie <airlied>
Status:	CLOSED ERRATA	QA Contact:	Desktop QE <desktop-qa-list>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	6.2	CC:	thoger, tpelka
Target Milestone:	rc
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-12-06 15:07:02 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:
Bug Blocks:	750914

Description Dave Airlie 2011-10-21 14:34:28 UTC

As pointed out on dri-devel we have incorrect permission on /dev/dri/control nodes they should be root only.

I don't think there is a sceurity issue, you can affect the modesetting but not access any of the buffer objects, but its a possible DOS against the current console users if running X.

fix is trivial change to one file.

Comment 1 RHEL Program Management 2011-10-21 14:50:47 UTC

This request was evaluated by Red Hat Product Management for inclusion
in a Red Hat Enterprise Linux maintenance release. Product Management has 
requested further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed 
products. This request is not yet committed for inclusion in an Update release.

Comment 4 Dave Airlie 2011-10-21 16:52:02 UTC

MODIFIED

libdrm-2.4.25-2 built in brew.

Comment 7 Dave Airlie 2011-10-28 11:10:51 UTC

did you reboot since udev has to be rerun to execute the rules from what I know.

Comment 8 Tomas Pelka 2011-10-31 13:23:16 UTC

Yes I did.

Comment 10 Dave Airlie 2011-11-01 14:01:30 UTC

root:video or root:root is fine, as long as they aren't world readable/writable.

Comment 14 errata-xmlrpc 2011-12-06 15:07:02 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2011-1613.html