drm/amd/display: Add null pointer check in mod_hdcp_hdcp1_create_session()

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The function mod_hdcp_hdcp1_create_session() calls the function
get_first_active_display(), but does not check its return value.
The return value is a null pointer if the display list is empty.
This will lead to a null pointer dereference.

Add a null pointer check for get_first_active_display() and return
MOD_HDCP_STATUS_DISPLAY_NOT_FOUND if the function return null.

This is similar to the commit c3e9826a22
("drm/amd/display: Add null pointer check for get_first_active_display()").

Fixes: 2deade5ede ("drm/amd/display: Remove hdcp display state with mst fix")
Signed-off-by: Chenyuan Yang <chenyuan0y@gmail.com>
Reviewed-by: Alex Hung <alex.hung@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 5e43eb3cd7)

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Chenyuan Yang 2025-07-23 21:36:41 -05:00 • committed by Alex Deucher

parent 66af73a1c3

commit 7a2ca2ea64

1 changed files with 3 additions and 0 deletions

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drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c

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