CyberRota Analysis
AI-GeneratedThe vulnerability in the Linux kernel affects the AMD GPU driver, specifically in the handling of doorbell mappings for user-created queues. An attacker could exploit this flaw to overwrite existing queue mappings, leading to misrouted interrupt processing and potential instability in the system. Organizations utilizing Linux with AMD GPU hardware should prioritize applying the relevant updates to mitigate risks associated with this vulnerability.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: reject mapping a reserved doorbell to a new queue When creating an user-queue, the user space provides a doorbell BO handle and an offset within the bo to obtain a doorbell. However current implementation using xa_store_irq() to store a doorbell, which allows a later queue created with the same BO and offset parameters to overwrite an existing queue and doorbell mapping. This can cause problems like misrouting fence IRQ processing to a wrong queue, and mislead the cleanup process of one queue erasing the mapping of another queue. This commit fixes this issue by replacing xa_store_irq with xa_insert_irq, which rejects mapping a reserved doorbell to a newly created queue (cherry picked from commit 6244eae22966350db52faf9c1369d3b2ffc5de4e)