Bug 2334685 (CVE-2024-56689)

Summary: CVE-2024-56689 kernel: PCI: endpoint: epf-mhi: Avoid NULL dereference if DT lacks 'mmio'
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 2024-12-28 10:02:31 UTC 
In the Linux kernel, the following vulnerability has been resolved:

PCI: endpoint: epf-mhi: Avoid NULL dereference if DT lacks 'mmio'

If platform_get_resource_byname() fails and returns NULL because DT lacks
an 'mmio' property for the MHI endpoint, dereferencing res->start will
cause a NULL pointer access. Add a check to prevent it.

[kwilczynski: error message update per the review feedback]
[bhelgaas: commit log]
Comment 1 Avinash Hanwate 2024-12-29 06:15:55 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024122834-CVE-2024-56689-69ca@gregkh/T