Bug 2300704 (CVE-2024-42091)

Summary:	CVE-2024-42091 kernel: drm/xe: Check pat.ops before dumping PAT settings
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	dfreiber, drow, jburrell, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 6.9.8, kernel 6.10	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2301746
Bug Blocks:

Description OSIDB Bzimport 2024-07-29 18:20:14 UTC

In the Linux kernel, the following vulnerability has been resolved:

drm/xe: Check pat.ops before dumping PAT settings

We may leave pat.ops unset when running on brand new platform or
when running as a VF.  While the former is unlikely, the latter
is valid (future) use case and will cause NPD when someone will
try to dump PAT settings by debugfs.

It's better to check pointer to pat.ops instead of specific .dump
hook, as we have this hook always defined for every .ops variant.

Comment 1 Mauro Matteo Cascella 2024-07-30 17:36:07 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024072904-CVE-2024-42091-597d@gregkh/T

Comment 2 Mauro Matteo Cascella 2024-07-30 17:36:29 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2301746]