Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix zero-size GDS range init on RDNA4 RDNA4 (GFX 12) hardware removes the GDS, GWS, and OA on-chip memory resources. The gfx_v12_0 initialisation code correctly leaves adev->gds.gds_size, adev->gds.gws_size, and adev->gds.oa_size at zero to reflect this. amdgpu_ttm_init() unconditionally calls amdgpu_ttm_init_on_chip() for each of these resources regardless of size. When the size is zero, amdgpu_ttm_init_on_chip() forwards the call to ttm_range_man_init(), which calls drm_mm_init(mm, 0, 0). drm_mm_init() immediately fires DRM_MM_BUG_ON(start + size <= start) -- trivially true when size is zero -- crashing the kernel during modprobe of amdgpu on an RX 9070 XT. Guard against this by returning 0 early from amdgpu_ttm_init_on_chip() when size_in_page is zero. This skips TTM resource manager registration for hardware resources that are absent, without affecting any other GPU type. DRM_MM_BUG_ON() only asserts if CONFIG_DRM_DEBUG_MM is enabled in the kernel config. This is apparently rarely enabled as these chips have been in the market for over a year and this issue was only reported now. Oops-Analysis: http://oops.fenrus.org/reports/bugzilla.korg/221376/report.html (cherry picked from commit 5719ce5865279cad4fd5f01011fe037168503f2d)
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
c832c346cdf9022872655be621880e0f66f4135d to < 1f5d33e7b0a9a2a140f46e22fb52eede323c5946affectedc832c346cdf9022872655be621880e0f66f4135d to < 9bc925759c05feae7dfa9570e77131d54729c8eaaffectedc832c346cdf9022872655be621880e0f66f4135d to < 36f9602fb22ede69fcc8b422be0cf8105bf655adaffectedc832c346cdf9022872655be621880e0f66f4135d to < be0376affcafa0bbb371bb501579a825eae32281affectedc832c346cdf9022872655be621880e0f66f4135d to < 0e21db1a77967bc15df662efdca8ea8a61d124eaaffectedc832c346cdf9022872655be621880e0f66f4135d to < 30c000a49094ec568c9b51b7421f7a4a3f0b0298affectedc832c346cdf9022872655be621880e0f66f4135d to < 3e26c76891ab99fa173e9c501119fbb5c9f4600faffectedc832c346cdf9022872655be621880e0f66f4135d to < 095a8b0ad3c3b5cdc3850d961adb8a8f735220bbaffected
Linux Linux
Default version status: affected
4.20affected0 to < 4.20unaffected5.10.258 to ≤ 5.10.*unaffected5.15.209 to ≤ 5.15.*unaffected6.1.175 to ≤ 6.1.*unaffected6.6.140 to ≤ 6.6.*unaffected6.12.86 to ≤ 6.12.*unaffected6.18.27 to ≤ 6.18.*unaffected7.0.4 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/1f5d33e7b0a9a2a140f46e22fb52eede323c5946 ↗
- https://git.kernel.org/stable/c/9bc925759c05feae7dfa9570e77131d54729c8ea ↗
- https://git.kernel.org/stable/c/36f9602fb22ede69fcc8b422be0cf8105bf655ad ↗
- https://git.kernel.org/stable/c/be0376affcafa0bbb371bb501579a825eae32281 ↗
- https://git.kernel.org/stable/c/0e21db1a77967bc15df662efdca8ea8a61d124ea ↗
- https://git.kernel.org/stable/c/30c000a49094ec568c9b51b7421f7a4a3f0b0298 ↗
- https://git.kernel.org/stable/c/3e26c76891ab99fa173e9c501119fbb5c9f4600f ↗
- https://git.kernel.org/stable/c/095a8b0ad3c3b5cdc3850d961adb8a8f735220bb ↗