Description
In the Linux kernel, the following vulnerability has been resolved: drm/i915/dsi: Don't do DSC horizontal timing adjustments in command mode Stop adjusting the horizontal timing values based on the compression ratio in command mode. Bspec seems to be telling us to do this only in video mode, and this is also how the Windows driver does things. This should also fix a div-by-zero on some machines because the adjusted htotal ends up being so small that we end up with line_time_us==0 when trying to determine the vtotal value in command mode. Note that this doesn't actually make the display on the Huawei Matebook E work, but at least the kernel no longer explodes when the driver loads. (cherry picked from commit 0b475e91ecc2313207196c6d7fd5c53e1a878525)
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
53693f02d80e0a909e76c2a25f8aac8515f959db to < 80cc84bdc49addaee6b6e4f735f574ab5a424c42affected53693f02d80e0a909e76c2a25f8aac8515f959db to < 481f7a463ae4bea9503ae7fa1481ad75dc872af4affected53693f02d80e0a909e76c2a25f8aac8515f959db to < 55efe8402f46af8399c8b634a18b130a05fd7820affected53693f02d80e0a909e76c2a25f8aac8515f959db to < 86e926b108880c0109b8635e459450447156aeb7affected53693f02d80e0a909e76c2a25f8aac8515f959db to < 33b5336e4fd8ba0e40a12989cadb3f5534a0f9e4affected53693f02d80e0a909e76c2a25f8aac8515f959db to < 4dfce79e098915d8e5fc2b9e1d980bc3251dd32caffected
Linux Linux
Default version status: affected
5.6affected0 to < 5.6unaffected6.1.191 to ≤ 6.1.*unaffected6.6.160 to ≤ 6.6.*unaffected6.12.81 to ≤ 6.12.*unaffected6.18.22 to ≤ 6.18.*unaffected6.19.12 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/80cc84bdc49addaee6b6e4f735f574ab5a424c42 ↗
- https://git.kernel.org/stable/c/481f7a463ae4bea9503ae7fa1481ad75dc872af4 ↗
- https://git.kernel.org/stable/c/55efe8402f46af8399c8b634a18b130a05fd7820 ↗
- https://git.kernel.org/stable/c/86e926b108880c0109b8635e459450447156aeb7 ↗
- https://git.kernel.org/stable/c/33b5336e4fd8ba0e40a12989cadb3f5534a0f9e4 ↗
- https://git.kernel.org/stable/c/4dfce79e098915d8e5fc2b9e1d980bc3251dd32c ↗