drm/xe/query: Fix topology query pointer advance

The topology query helper advanced the user pointer by the size
of the pointer, not the size of the structure. This can misalign
the output blob and corrupt the following mask. Fix the increment
to use sizeof(*topo).
There is no issue currently, as sizeof(*topo) happens to be equal
to sizeof(topo) on 64-bit systems (both evaluate to 8 bytes).

Fixes: dd08ebf ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Signed-off-by: Shuicheng Lin <[email protected]>
Reviewed-by: Matt Roper <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Matt Roper <[email protected]>
(cherry picked from commit c2a6859)
Signed-off-by: Thomas Hellström <[email protected]>

Author: ShuichengLin

drivers/gpu/drm/xe/xe_query.c

@@ -491,7 +491,7 @@ static int copy_mask(void __user **ptr,
 
 	if (copy_to_user(*ptr, topo, sizeof(*topo)))
 		return -EFAULT;
-	*ptr += sizeof(topo);
+	*ptr += sizeof(*topo);
 
 	if (copy_to_user(*ptr, mask, mask_size))
 		return -EFAULT;