Bug 2315175 (CVE-2024-46823)

Summary:	CVE-2024-46823 kernel: kunit/overflow: Fix UB in overflow_allocation_test
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	dfreiber, drow, jburrell, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Linux kernel before initialization in subsystem tests. The 'device_name' array doesn't exist out of the 'overflow_allocation_test' function scope, however, it is being used as a driver name when calling 'kunit_driver_create' from 'kunit_device_register', which can produce a kernel panic with KASAN enabled. This could allow a local user to crash the system.	Story Points:	---
Clone Of:		Environment:
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2315283
Bug Blocks:

Description OSIDB Bzimport 2024-09-27 13:21:37 UTC

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

kunit/overflow: Fix UB in overflow_allocation_test

The 'device_name' array doesn't exist out of the
'overflow_allocation_test' function scope. However, it is being used as
a driver name when calling 'kunit_driver_create' from
'kunit_device_register'. It produces the kernel panic with KASAN
enabled.

Since this variable is used in one place only, remove it and pass the
device name into kunit_device_register directly as an ascii string.

Comment 1 Robb Gatica 2024-09-27 15:20:15 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024092750-CVE-2024-46823-b19e@gregkh/T