Description
In the Linux kernel, the following vulnerability has been resolved: drm/vc4: hvs/v3d: Fix null dereference in unbind The hvs and v3d drivers use dev_get_drvdata(master) in their unbind functions. Since the vc4-drm gets removed before its dependent drivers (vc4_hvs/vc4_v3d) the vc4_hvs_unbind/vc4_v3d_unbind functions try to get drvdata of its master and fails with a null dereference error. Use the data pointer passed to the unbind functions directly instead of dev_get_drvdata(master). This avoids using potentially freed memory.
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
c8b75bca92cbf064b9fa125fc74a85994452e935 to < 3ed3d0b31500b11c8fd9ef96b7703edbccb32e2eaffectedc8b75bca92cbf064b9fa125fc74a85994452e935 to < 3be8dcc1a5854cf24cc332e0d6fc865c47ff49a1affectedc8b75bca92cbf064b9fa125fc74a85994452e935 to < 8f62aae059e06746a18a00af27179c3c0f17f4c7affectedc8b75bca92cbf064b9fa125fc74a85994452e935 to < 708688ec31ac6b35103ba364dc300a09930079d4affectedc8b75bca92cbf064b9fa125fc74a85994452e935 to < 261f0a3f0ac03248284f5116d3258f89c9642215affectedc8b75bca92cbf064b9fa125fc74a85994452e935 to < 7dc3680b7ffe01add3e9299fde8471d2dd53a8aeaffected
Linux Linux
Default version status: affected
4.4affected0 to < 4.4unaffected6.1.191 to ≤ 6.1.*unaffected6.6.160 to ≤ 6.6.*unaffected6.12.111 to ≤ 6.12.*unaffected6.18.53 to ≤ 6.18.*unaffected7.1.6 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/3ed3d0b31500b11c8fd9ef96b7703edbccb32e2e ↗
- https://git.kernel.org/stable/c/3be8dcc1a5854cf24cc332e0d6fc865c47ff49a1 ↗
- https://git.kernel.org/stable/c/8f62aae059e06746a18a00af27179c3c0f17f4c7 ↗
- https://git.kernel.org/stable/c/708688ec31ac6b35103ba364dc300a09930079d4 ↗
- https://git.kernel.org/stable/c/261f0a3f0ac03248284f5116d3258f89c9642215 ↗
- https://git.kernel.org/stable/c/7dc3680b7ffe01add3e9299fde8471d2dd53a8ae ↗