Bug 2347880 (CVE-2022-49678)

Summary:	CVE-2022-49678 kernel: soc: bcm: brcmstb: pm: pm-arm: Fix refcount leak in brcmstb_pm_probe
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
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Hardware:	All
OS:	Linux
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2025-02-26 03:09:57 UTC

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

soc: bcm: brcmstb: pm: pm-arm: Fix refcount leak in brcmstb_pm_probe

of_find_matching_node() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.
Add missing of_node_put() to avoid refcount leak.

In brcmstb_init_sram, it pass dn to of_address_to_resource(),
of_address_to_resource() will call of_find_device_by_node() to take
reference, so we should release the reference returned by
of_find_matching_node().

Comment 2 Avinash Hanwate 2025-02-28 00:42:00 UTC

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022625-CVE-2022-49678-d39c@gregkh/T