Bug 2313049 (CVE-2024-46718)

Summary:	CVE-2024-46718 kernel: drm/xe: Don't overmap identity VRAM mapping
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
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2313080
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Description OSIDB Bzimport 2024-09-18 07:21:09 UTC

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

drm/xe: Don't overmap identity VRAM mapping

Overmapping the identity VRAM mapping is triggering hardware bugs on
certain platforms. Use 2M pages for the last unaligned (to 1G) VRAM
chunk.

v2:
 - Always use 2M pages for last chunk (Fei Yang)
 - break loop when 2M pages are used
 - Add assert for usable_size being 2M aligned
v3:
 - Fix checkpatch

Comment 1 Michal Findra 2024-09-18 08:12:58 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024091833-CVE-2024-46718-c5c7@gregkh/T