Bug 2347660 (CVE-2022-49323)

Summary: CVE-2022-49323 kernel: iommu/arm-smmu: fix possible null-ptr-deref in arm_smmu_device_probe()
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 03:02:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

iommu/arm-smmu: fix possible null-ptr-deref in arm_smmu_device_probe()

It will cause null-ptr-deref when using 'res', if platform_get_resource()
returns NULL, so move using 'res' after devm_ioremap_resource() that
will check it to avoid null-ptr-deref.
And use devm_platform_get_and_ioremap_resource() to simplify code.
Comment 1 Mauro Matteo Cascella 2025-02-26 11:39:50 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025022638-CVE-2022-49323-7559@gregkh/T