Bug 1776832 (CVE-2019-19082)

Summary:	CVE-2019-19082 kernel: memory leaks in *create_resource_pool() functions under drivers/gpu/drm/amd/display/dc leads to DoS
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	acaringi, airlied, bdettelb, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, mcressma, mjg59, mlangsdo, nmurray, qzhao, rt-maint, rvrbovsk, steved, williams
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 memory leak flaw was found in the Linux kernel. A system crash occurs under very specific, hard to obtain conditions, when the AMD GPU Display Engine configuration initialization handles resource cleaning when a failure occurs. The highest threat from this vulnerability is system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-25 22:13:41 UTC	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:	1776833, 1825118, 1825119, 1825120, 1825121, 1825122
Bug Blocks:	1776834

Description Guilherme de Almeida Suckevicz 2019-11-26 13:25:15 UTC

Memory leaks in *create_resource_pool() functions under drivers/gpu/drm/amd/display/dc in the Linux kernel through 5.3.11 allow attackers to cause a denial of service (memory consumption). This affects the dce120_create_resource_pool() function in drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c, the dce110_create_resource_pool() function in drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c, the dce100_create_resource_pool() function in drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c, the dcn10_create_resource_pool() function in drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c, and the dce112_create_resource_pool() function in drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c, aka CID-104c307147ad.

Reference and upstream commit:
https://github.com/torvalds/linux/commit/104c307147ad379617472dd91a5bcb368d72bd6d

Comment 1 Guilherme de Almeida Suckevicz 2019-11-26 13:26:26 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1776833]

Comment 2 Justin M. Forbes 2019-12-03 15:14:14 UTC

This is fixed for Fedora with the 5.3.14 stable kernel updates.

Comment 4 Petr Matousek 2020-04-17 06:33:42 UTC

Mitigation:

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Comment 6 Eric Christensen 2020-04-17 16:05:34 UTC

Statement:

This issue is rated as having a Low impact because of the preconditions needed to trigger the resource cleanup code path (system-wide out-of-memory condition).