Bug 2419880 (CVE-2023-53754)

Summary: CVE-2023-53754 kernel: scsi: lpfc: Fix ioremap issues in lpfc_sli4_pci_mem_setup()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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OS: Linux   
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Description OSIDB Bzimport 2025-12-08 07:05:51 UTC 
In the Linux kernel, the following vulnerability has been resolved:

scsi: lpfc: Fix ioremap issues in lpfc_sli4_pci_mem_setup()

When if_type equals zero and pci_resource_start(pdev, PCI_64BIT_BAR4)
returns false, drbl_regs_memmap_p is not remapped. This passes a NULL
pointer to iounmap(), which can trigger a WARN() on certain arches.

When if_type equals six and pci_resource_start(pdev, PCI_64BIT_BAR4)
returns true, drbl_regs_memmap_p may has been remapped and
ctrl_regs_memmap_p is not remapped. This is a resource leak and passes a
NULL pointer to iounmap().

To fix these issues, we need to add null checks before iounmap(), and
change some goto labels.
Comment 1 Jon Moroney 2025-12-08 23:14:35 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025120843-CVE-2023-53754-c601@gregkh/T