Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: drm/xe: Open-code GGTT MMIO access protection GGTT MMIO access is currently protected by hotplug (drm_dev_enter), which works correctly when the driver loads successfully and is later unbound or unloaded. However, if driver load fails, this protection is insufficient because drm_dev_unplug() is never called. Additionally, devm release functions cannot guarantee that all BOs with GGTT mappings are destroyed before the GGTT MMIO region is removed, as some BOs may be freed asynchronously by worker threads. To address this, introduce an open-coded flag, protected by the GGTT lock, that guards GGTT MMIO access. The flag is cleared during the dev_fini_ggtt devm release function to ensure MMIO access is disabled once teardown begins. (cherry picked from commit 4f3a998a173b4325c2efd90bdadc6ccd3ad9a431)
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 919bb54e989c1edef87e9797be125c94c450fc65 before e2b424aadecb640f9e037b2891191cf8fd4c64cf; affected 919bb54e989c1edef87e9797be125c94c450fc65 before 1e9e2640d870d4837bcfdc220cb2c99ae5ee119f; affected 919bb54e989c1edef87e9797be125c94c450fc65 before 76326dc06d8793c2c81c31cc0115dbc348de2f88; affected 919bb54e989c1edef87e9797be125c94c450fc65 before 01f2557aa684e514005541e71a3d01f4cd45c170 |
| Linux / Linux | affected 6.12; unaffected 0 before 6.12; unaffected 6.12.78 through 6.12.*; unaffected 6.18.20 through 6.18.*; unaffected 6.19.10 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/e2b424aadecb640f9e037b2891191cf8fd4c64cf
- https://git.kernel.org/stable/c/1e9e2640d870d4837bcfdc220cb2c99ae5ee119f
- https://git.kernel.org/stable/c/76326dc06d8793c2c81c31cc0115dbc348de2f88
- https://git.kernel.org/stable/c/01f2557aa684e514005541e71a3d01f4cd45c170
ADP enrichment
No English description supplied.
No references supplied.