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Change History

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: Fix invalid context error in dml helper

[Why]
"BUG: sleeping function called from invalid context" error.
after:
"drm/amd/display: Protect FPU in dml2_validate()/dml21_validate()"

The populate_dml_plane_cfg_from_plane_state() uses the GFP_KERNEL flag
for memory allocation, which shouldn't be used in atomic contexts.

The allocation is needed only for using another helper function
get_scaler_data_for_plane().

[How]
Modify helpers to pass a pointer to scaler_data within existing context,
eliminating the need for dynamic memory allocation/deallocation
and copying.

(cherry picked from commit bd3e84bc98f81b44f2c43936bdadc3241d654259)

https://git.kernel.org/stable/c/9984db63742099ee3f3cff35cf71306d10e64356

https://git.kernel.org/stable/c/b371f8f6d89ec8dfea796e00a44a57c44fc8fcc0

https://git.kernel.org/stable/c/d8c4afe78385cd355e4d80299d785379d6e874df