Bug 2267023 (CVE-2023-52484)

Summary:	CVE-2023-52484 kernel: iommu/arm-smmu-v3: Fix soft lockup triggered by arm_smmu_mm_invalidate_range
Product:	[Other] Security Response	Reporter:	Avinash Hanwate <ahanwate>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	acaringi, allarkin, aquini, bhu, chwhite, cye, cyin, dbohanno, debarbos, dfreiber, drow, dvlasenk, esandeen, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, mleitner, mmilgram, mstowell, nmurray, ptalbert, rparrazo, rrobaina, rvrbovsk, scweaver, sidakwo, sukulkar, tglozar, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.15.134, kernel 6.1.56, kernel 6.5.6, kernel 6.6	Doc Type:	If docs needed, set a value
Doc Text:	In arm_smmu_v3 (part of the Linux IOMMU/SMMU driver), there’s a bug in the function arm_smmu_mm_invalidate_range (or its renamed variant) that can trigger a soft lockup, meaning the CPU gets stuck executing without making progress. The issue arises when flushing/invalidating TLB (translation lookaside buffer) ranges: there’s no limit enforced for the number of per-page TLBI (TLB invalidation) operations, unlike in the CPU MMU path which has MAX_TLBI_OPS. This allows extremely large or many invalidation requests to overwhelm the arm_smmu command queue, causing it to spin or stall.	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:	2267024
Bug Blocks:	2266913

Description Avinash Hanwate 2024-02-29 11:08:25 UTC

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

iommu/arm-smmu-v3: Fix soft lockup triggered by arm_smmu_mm_invalidate_range

The Linux kernel CVE team has assigned CVE-2023-52484 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024022923-CVE-2023-52484-3635@gregkh/T/#u

Comment 1 Avinash Hanwate 2024-02-29 11:09:05 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2267024]

Comment 2 Justin M. Forbes 2024-02-29 17:29:45 UTC

This was fixed for Fedora with the 6.5.6 stable kernel updates.

Comment 5 Alex 2024-06-09 13:16:12 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2023-52484 is: 	SKIP	No affected files built, so skip this CVE	NO			-	-	unknown (where first YES/NO value means if related sources built).