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drm/amd/display: Check phantom_stream before it is used

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commit 3718a619a8c0a53152e76bb6769b6c414e1e83f4 upstream.

dcn32_enable_phantom_stream can return null, so returned value
must be checked before used.

This fixes 1 NULL_RETURNS issue reported by Coverity.

Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@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>
[Xiangyu: BP to fix CVE: CVE-2024-49897, modified the source path]
Signed-off-by: Xiangyu Chen <xiangyu.chen@windriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Alex Hung
2024-06-20 20:23:41 -06:00
committed by Greg Kroah-Hartman
parent e8a2476789
commit db1d7e1794
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource.c
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@@ -1796,6 +1796,9 @@ void dcn32_add_phantom_pipes(struct dc *dc, struct dc_state *context,
// be a valid candidate for SubVP (i.e. has a plane, stream, doesn't // be a valid candidate for SubVP (i.e. has a plane, stream, doesn't
// already have phantom pipe assigned, etc.) by previous checks. // already have phantom pipe assigned, etc.) by previous checks.
phantom_stream = dcn32_enable_phantom_stream(dc, context, pipes, pipe_cnt, index); phantom_stream = dcn32_enable_phantom_stream(dc, context, pipes, pipe_cnt, index);
if (!phantom_stream)
return;
dcn32_enable_phantom_plane(dc, context, phantom_stream, index); dcn32_enable_phantom_plane(dc, context, phantom_stream, index);
for (i = 0; i < dc->res_pool->pipe_count; i++) { for (i = 0; i < dc->res_pool->pipe_count; i++) {