Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected c8b75bca92cbf064b9fa125fc74a85994452e935 before 3be8dcc1a5854cf24cc332e0d6fc865c47ff49a1; affected c8b75bca92cbf064b9fa125fc74a85994452e935 before 8f62aae059e06746a18a00af27179c3c0f17f4c7; affected c8b75bca92cbf064b9fa125fc74a85994452e935 before 708688ec31ac6b35103ba364dc300a09930079d4; affected c8b75bca92cbf064b9fa125fc74a85994452e935 before 261f0a3f0ac03248284f5116d3258f89c9642215; affected c8b75bca92cbf064b9fa125fc74a85994452e935 before 7dc3680b7ffe01add3e9299fde8471d2dd53a8ae |
| Linux / Linux | affected 4.4; unaffected 0 before 4.4; unaffected 6.6.160 through 6.6.*; unaffected 6.12.111 through 6.12.*; unaffected 6.18.53 through 6.18.*; unaffected 7.1.6 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- 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