CVE-2023-53758

/// Technical description

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

spi: atmel-quadspi: Free resources even if runtime resume failed in .remove()

An early error exit in atmel_qspi_remove() doesn't prevent the device

unbind. So this results in an spi controller with an unbound parent

and unmapped register space (because devm_ioremap_resource() is undone).

So using the remaining spi controller probably results in an oops.

Instead unregister the controller unconditionally and only skip hardware

access and clk disable.

Also add a warning about resume failing and return zero unconditionally.

The latter has the only effect to suppress a less helpful error message by

the spi core.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References