CVE-2025-71314

/// Technical description

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

drm/panthor: Recover from panthor_gpu_flush_caches() failures

We have seen a few cases where the whole memory subsystem is blocked

and flush operations never complete. When that happens, we want to:

- schedule a reset, so we can recover from this situation

- in the reset path, we need to reset the pending_reqs so we can send

new commands after the reset

- if more panthor_gpu_flush_caches() operations are queued after

the timeout, we skip them and return -EIO directly to avoid needless

waits (the memory block won't miraculously work again)

Note that we drop the WARN_ON()s because these hangs can be triggered

with buggy GPU jobs created by the UMD, and there's no way we can

prevent it. We do keep the error messages though.

v2:

- New patch

v3:

- Collect R-b

- Explicitly mention the fact we dropped the WARN_ON()s in the commit

message

v4:

- No changes

/// 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