Description (CNA)
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)
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 8949843762631d9d0fc526dfb61a272dca29fc6f before 1050d258c7c56066d2dcaedf8d0ef66364062adc; affected 8949843762631d9d0fc526dfb61a272dca29fc6f before a609b6278bf3cde17eeee6620091465521e4b02c |
| Linux / Linux | affected 6.16; unaffected 0 before 6.16; unaffected 7.1.6 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/1050d258c7c56066d2dcaedf8d0ef66364062adc
- https://git.kernel.org/stable/c/a609b6278bf3cde17eeee6620091465521e4b02c
ADP enrichment
No English description supplied.
No references supplied.