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drm/amd/display: Check denominator pbn_div before used

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BugLink: https://bugs.launchpad.net/bugs/2085849

[ Upstream commit 116a678f3a9abc24f5c9d2525b7393d18d9eb58e ]

[WHAT & HOW]
A denominator cannot be 0, and is checked before used.

This fixes 1 DIVIDE_BY_ZERO issue reported by Coverity.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Jerry Zuo <jerry.zuo@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
CVE-2024-46773
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Roxana Nicolescu <roxana.nicolescu@canonical.com>
This commit is contained in:
Alex Hung
2024-06-18 16:21:20 -06:00
committed by Mehmet Basaran
parent 2b3a0ce029
commit 06b74c8546
1 changed files with 1 additions and 1 deletions
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drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+1 -1
View File
@@ -7234,7 +7234,7 @@ static int dm_update_mst_vcpi_slots_for_dsc(struct drm_atomic_state *state,
}
}
if (j == dc_state->stream_count)
if (j == dc_state->stream_count || pbn_div == 0)
continue;
slot_num = DIV_ROUND_UP(pbn, pbn_div);