Bug 2320269 (CVE-2024-47704)

Summary:	CVE-2024-47704 kernel: drm/amd/display: Check link_res->hpo_dp_link_enc before using it
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
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:	2320346
Bug Blocks:

Description OSIDB Bzimport 2024-10-21 13:07:05 UTC

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

drm/amd/display: Check link_res->hpo_dp_link_enc before using it

[WHAT & HOW]
Functions dp_enable_link_phy and dp_disable_link_phy can pass link_res
without initializing hpo_dp_link_enc and it is necessary to check for
null before dereferencing.

This fixes 2 FORWARD_NULL issues reported by Coverity.

Comment 1 Robb Gatica 2024-10-21 15:06:54 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024102116-CVE-2024-47704-d937@gregkh/T