6.6-stable review patch. If anyone has any objections, please let me know.
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From: Ma Ke make24@iscas.ac.cn
commit 374c9faac5a763a05bc3f68ad9f73dab3c6aec90 upstream.
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: 3be5262e353b ("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 63e6a77ccf239337baa9b1e7787cde9fa0462092) Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c +++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c @@ -1394,7 +1394,8 @@ bool resource_build_scaling_params(struc 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) {