CVE-2021-47659 Information

Description

In the Linux kernel the following vulnerability has been resolved:

drm/plane: Move range check for format_count earlier

While the check for format_count > 64 in __drm_universal_plane_init() shouldn’t be hit (it’s a WARN_ON) in its current position it will then leak the plane->format_types array and fail to call drm_mode_object_unregister() leaking the modeset identifier. Move it to the start of the function to avoid allocating those resources in the first place.

Reference

https://git.kernel.org/stable/c/1e29d829ad51d1472dd035487953a6724b56fc33 https://git.kernel.org/stable/c/4ab7e453a3ee88c274cf97bee9487ab92a66d313 https://git.kernel.org/stable/c/4b674dd69701c2e22e8e7770c1706a69f3b17269 https://git.kernel.org/stable/c/787163d19bc3cdc6ca4b96223f62208534d1cf6b https://git.kernel.org/stable/c/978e3d023256bfaf34a0033d40c94e8a8e70cf3c https://git.kernel.org/stable/c/ad6dd7a2bac86118985c7b3426e175b9d3c1ec4f https://git.kernel.org/stable/c/b5cd108143513e4498027b96ec4710702d186f11