Wentao Liang c3e9826a22 drm/amd/display: Add null pointer check for get_first_active_display() ... The function mod_hdcp_hdcp1_enable_encryption() 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 in mod_hdcp_hdcp2_enable_encryption(). Add a null pointer check for get_first_active_display() and return MOD_HDCP_STATUS_DISPLAY_NOT_FOUND if the function return null. Fixes: 2deade5ede ("drm/amd/display: Remove hdcp display state with mst fix") Signed-off-by: Wentao Liang <vulab@iscas.ac.cn> Reviewed-by: Alex Hung <alex.hung@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org # v5.8		2025-05-29 10:57:13 -04:00
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color	drm/amd/display: Remove unused regamma functions	2024-11-04 11:25:50 -05:00
freesync	drm/amd/display: Remove unused freesync functions	2025-02-12 21:03:02 -05:00
hdcp	drm/amd/display: Add null pointer check for get_first_active_display()	2025-05-29 10:57:13 -04:00
inc	drm/amd/display: HDCP Locality check using DMUB Fused IO	2025-04-07 18:01:07 -04:00
info_packet	drm/amd/display: Fix BT2020 YCbCr limited/full range input	2025-02-19 15:14:10 -05:00
power	drm/amd/display: Revised for Replay Pseudo vblank control	2025-01-10 12:11:38 -05:00
vmid	drm/amd: Fix spelling typo in comments	2022-06-03 16:43:36 -04:00