Bug 2347878 (CVE-2022-49462)

Summary: CVE-2022-49462 kernel: drm/msm/a6xx: Fix refcount leak in a6xx_gpu_init
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-02-26 03:09:54 UTC 
In the Linux kernel, the following vulnerability has been resolved:

drm/msm/a6xx: Fix refcount leak in a6xx_gpu_init

of_parse_phandle() returns a node pointer with refcount
incremented, we should use of_node_put() on it when not need anymore.

a6xx_gmu_init() passes the node to of_find_device_by_node()
and of_dma_configure(), of_find_device_by_node() will takes its
reference, of_dma_configure() doesn't need the node after usage.

Add missing of_node_put() to avoid refcount leak.
Comment 1 Avinash Hanwate 2025-02-26 22:06:57 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022601-CVE-2022-49462-52fb@gregkh/T