Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: drm/vc4: Zero the tile state data array before each BIN job The binner BO is a single 16MB buffer split into 512KB slots that are handed out to jobs at submission time and recycled as jobs complete, without ever being cleared. Each slot holds the job's Tile State Data Array (TSDA) at its start, followed by the tile allocation pool. While the tile allocation pool is only walked by the render thread through branches the binner generated during the current job, the TSDA is the PTB's own per-tile bookkeeping and is consumed by the hardware itself. Although the kernel sets the "Auto-initialise Tile State Data Array" flag in the tile binning mode configuration, the PTB demonstrably still acts on stale tile state left by the slot's previous user: the binner ends up creating invalid command streams with invalid primitive streams and branches, which can cause GPU hangs as observed in [1][2]. Zero the TSDA when the job's binning slot is configured. This clears 48 bytes per tile (~24KB for a 1080p frame) in the submission path, and guarantees the PTB never sees another job's tile state. The tile count is only checked for being non-zero today, so the 8-bit fields it comes from can describe a tile state array almost six times larger than the slot it has to live in. Bound it before the slot is handed out, since such size decides how much of the slot is left for the tile alloc pool.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 before c5d8e8e1a8e3b4e464683c5a8a869c16a6382fea; affected 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 before d3677372e0275e139f0efd2872c5a524b5d12868; affected 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 before c8dea7e7c6098e383e44f21a64d0431da5480e3f; affected 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 before f5802be65535f8818af7191159cf8c11f48ab2a2; affected 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 before 0e858422df2334165293ea742da9fbb2e51f2739; affected 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 before 57667eb7548faaac396c6e39f3b4444dab5b097c; affected 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 before a75c8f365e209aa9bb927b0942a7840152d44892; affected 553c942f8b2cbc7394b4d4fa2f848b23a8f07451 before 48a570c964d8e37d353381e4195106277e17f5cb |
| Linux / Linux | affected 4.13; unaffected 0 before 4.13; unaffected 5.10.265 through 5.10.*; unaffected 5.15.216 through 5.15.*; unaffected 6.1.183 through 6.1.*; unaffected 6.6.151 through 6.6.*; unaffected 6.12.103 through 6.12.*; unaffected 6.18.44 through 6.18.*; unaffected 7.1.8 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c5d8e8e1a8e3b4e464683c5a8a869c16a6382fea
- https://git.kernel.org/stable/c/d3677372e0275e139f0efd2872c5a524b5d12868
- https://git.kernel.org/stable/c/c8dea7e7c6098e383e44f21a64d0431da5480e3f
- https://git.kernel.org/stable/c/f5802be65535f8818af7191159cf8c11f48ab2a2
- https://git.kernel.org/stable/c/0e858422df2334165293ea742da9fbb2e51f2739
- https://git.kernel.org/stable/c/57667eb7548faaac396c6e39f3b4444dab5b097c
- https://git.kernel.org/stable/c/a75c8f365e209aa9bb927b0942a7840152d44892
- https://git.kernel.org/stable/c/48a570c964d8e37d353381e4195106277e17f5cb
ADP enrichment
No English description supplied.
No references supplied.