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drm/amd/display: Fix null check for pipe_ctx->plane_state in resource_build_scaling_params

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Null pointer dereference issue could occur when pipe_ctx->plane_state
is null. The fix adds a check to ensure 'pipe_ctx->plane_state' is not
null before accessing. This prevents a null pointer dereference.

Found by code review.

Fixes: 3be5262e35 ("drm/amd/display: Rename more dc_surface stuff to plane_state")
Reviewed-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Ma Ke <make24@iscas.ac.cn>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 63e6a77ccf)
Cc: stable@vger.kernel.org
This commit is contained in:
Ma Ke 2025-02-26 16:37:31 +08:00 committed by Alex Deucher
parent 7eb172143d
commit 374c9faac5
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/display/dc/core/dc_resource.c
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@ -1455,7 +1455,8 @@ bool resource_build_scaling_params(struct pipe_ctx *pipe_ctx)
DC_LOGGER_INIT(pipe_ctx->stream->ctx->logger);
/* Invalid input */
if (!plane_state->dst_rect.width ||
if (!plane_state ||
!plane_state->dst_rect.width ||
!plane_state->dst_rect.height ||
!plane_state->src_rect.width ||
!plane_state->src_rect.height) {