Bug 2315154 (CVE-2024-46803)

Summary:	CVE-2024-46803 kernel: drm/amdkfd: Check debug trap enable before write dbg_ev_file
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, rhel-process-autobot, vkumar, watson-tool-maintainers
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Linux kernel's drm/amdkfd component. This vulnerability occurs when the `dbg_ev_file` write operation is executed after `debug_trap_disable` in an interrupt context, leading to a NULL pointer access. A local attacker could exploit this to cause a system crash, resulting in a Denial of Service (DoS).	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:	2315317
Bug Blocks:

Description OSIDB Bzimport 2024-09-27 13:20:45 UTC

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

drm/amdkfd: Check debug trap enable before write dbg_ev_file

In interrupt context, write dbg_ev_file will be run by work queue. It
will cause write dbg_ev_file execution after debug_trap_disable, which
will cause NULL pointer access.
v2: cancel work "debug_event_workarea" before set dbg_ev_file as NULL.

Comment 1 Robb Gatica 2024-09-27 15:46:09 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024092708-CVE-2024-46803-689b@gregkh/T