drm/amd/display: fix possible buffer overflow relating to secure display

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It is possible that adev->dm.dc->caps.max_links is greater than
AMDGPU_MAX_CRTCS. So, to not potentially access unallocated memory use
adev->mode_info.num_crtc to do the bounds check instead of
adev->dm.dc->caps.max_links.

Fixes: 1b11ff764a ("drm/amd/display: Implement multiple secure display")
Fixes: b8ff7e08ba ("drm/amd/display: Fix when disabling secure_display")
Reviewed-by: Alan Liu <HaoPing.Liu@amd.com>
Signed-off-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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This commit is contained in:

Hamza Mahfooz 2023-01-11 12:25:14 -05:00 • committed by Alex Deucher

parent 0c2dece8fb

commit c3d7496094

2 changed files with 6 additions and 4 deletions

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2

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

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8

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crc.c

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