Bug 1776838 (CVE-2019-19083) - CVE-2019-19083 kernel: memory leaks in *clock_source_create() functions under drivers/gpu/drm/amd/display/dc leads to DoS
Summary: CVE-2019-19083 kernel: memory leaks in *clock_source_create() functions under...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-19083
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1776839 1825125 1825126 1825127 1825128 1825129
Blocks: 1776840
TreeView+ depends on / blocked
 
Reported: 2019-11-26 13:35 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-10-25 22:13 UTC (History)
42 users (show)

Fixed In Version:
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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.
Clone Of:
Environment:
Last Closed: 2021-10-25 22:13:52 UTC
Embargoed:

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Description Guilherme de Almeida Suckevicz 2019-11-26 13:35:29 UTC 
Memory leaks in *clock_source_create() functions under drivers/gpu/drm/amd/display/dc in the Linux kernel before 5.3.8 allow attackers to cause a denial of service (memory consumption). This affects the dce112_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c, the dce100_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c, the dcn10_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c, the dcn20_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c, the dce120_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c, the dce110_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c, and the dce80_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c, aka CID-055e547478a1.

Reference and upstream commit:
https://github.com/torvalds/linux/commit/055e547478a11a6360c7ce05e2afc3e366968a12
Comment 1 Guilherme de Almeida Suckevicz 2019-11-26 13:36:19 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1776839]
Comment 2 Justin M. Forbes 2019-11-26 14:14:38 UTC 
This was fixed for Fedora with the 5.3.8 stable kernel updates.
Comment 4 Petr Matousek 2020-04-17 06:42:45 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 16:18:16 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).
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