Bug 2298111 (CVE-2022-48775)

Summary:	CVE-2022-48775 kernel: Drivers: hv: vmbus: Fix memory leak in vmbus_add_channel_kobj
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, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 4.19.231, kernel 5.4.181, kernel 5.10.102, kernel 5.15.25, kernel 5.16.11, kernel 5.17	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in the Linux kernel's Hyper-V VMBus driver, which involved a memory leak caused by improper handling of the kobject_init_and_add() function in vmbus_add_channel_kobj(). When this function fails, it still references the kobject, which must be released by calling kobject_put().	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:

Description OSIDB Bzimport 2024-07-16 12:22:25 UTC

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

Drivers: hv: vmbus: Fix memory leak in vmbus_add_channel_kobj

kobject_init_and_add() takes reference even when it fails.
According to the doc of kobject_init_and_add()：

   If this function returns an error, kobject_put() must be called to
   properly clean up the memory associated with the object.

Fix memory leak by calling kobject_put().