drm/amd/display: Check index msg_id before read or write

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[ Upstream commit 59d99deb33 ]

[WHAT]
msg_id is used as an array index and it cannot be a negative value, and
therefore cannot be equal to MOD_HDCP_MESSAGE_ID_INVALID (-1).

[HOW]
Check whether msg_id is valid before reading and setting.

This fixes 4 OVERRUN issues reported by Coverity.

Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Alex Hung 2024-04-18 13:27:43 -06:00 • committed by Greg Kroah-Hartman

parent c6e777356f

commit fbb0701af9

1 changed files with 8 additions and 0 deletions

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

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