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drm/amd/display: Handle null 'stream_status' in 'planes_changed_for_existing_stream'

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[ Upstream commit 8141f21b94 ]

This commit adds a null check for 'stream_status' in the function
'planes_changed_for_existing_stream'. Previously, the code assumed
'stream_status' could be null, but did not handle the case where it was
actually null. This could lead to a null pointer dereference.

Reported by smatch:
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_resource.c:3784 planes_changed_for_existing_stream() error: we previously assumed 'stream_status' could be null (see line 3774)

Cc: Tom Chung <chiahsuan.chung@amd.com>
Cc: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Cc: Roman Li <roman.li@amd.com>
Cc: Alex Hung <alex.hung@amd.com>
Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Srinivasan Shanmugam 2024-07-26 19:31:55 +05:30 committed by Greg Kroah-Hartman
parent 6ec7c73934
commit 4778982c73
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/amd/display/dc/core/dc_resource.c
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@ -2877,8 +2877,10 @@ static bool planes_changed_for_existing_stream(struct dc_state *context,
}
}
if (!stream_status)
if (!stream_status) {
ASSERT(0);
return false;
}
for (i = 0; i < set_count; i++)
if (set[i].stream == stream)