Executive brief
A diagnostic warning in the Linux kernel's Nouveau graphics driver was found to trigger frequently during system startup or hardware probing. While these warnings do not represent a security threat or functional failure, they can clutter system logs and cause unnecessary concern for administrators. The issue has been resolved by removing the excessive warning messages.
Technical details
The Nouveau driver's GSP-RM (GPU System Processor - Resource Manager) implementation contained several WARN_ON() macros within ACPI probing functions, specifically r535_gsp_acpi_caps, r535_gsp_acpi_jt, and r535_gsp_acpi_dod. These warnings were triggered when ACPI buffer types or lengths did not match expected values. Developers determined these conditions were non-critical and 'harmless' in practice. The fix involves replacing the WARN_ON() macros with standard conditional checks to prevent kernel log spam and unnecessary stack traces without changing the underlying logic.
Affected products
- Linux Linux Kernel Nouveau driver with GSP-RM support
Timeline
- 2024-11-21: other: Initial patch authored
- 2026-05-13: advisory: CVE published