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| author | Wentao Liang <vulab@iscas.ac.cn> | 2025-05-26 10:37:31 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-07-06 11:01:45 +0200 |
| commit | 4ce9f2dc9ff7cc410e8c5d936ec551e26b9599a9 (patch) | |
| tree | af2ab2a01c9da9c6285a613fd7a2d6e33294f0e8 /drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | |
| parent | b7e273ebb39921248bcf0b6d47939463f2b13960 (diff) | |
drm/amd/display: Add null pointer check for get_first_active_display()
commit c3e9826a22027a21d998d3e64882fa377b613006 upstream.
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: 2deade5ede56 ("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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c')
0 files changed, 0 insertions, 0 deletions