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: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Signed-off-by: Shuicheng Lin <shuicheng.lin@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patch.msgid.link/20260130043907.465128-2-shuicheng.lin@intel.com
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
(cherry picked from commit c2a6859138e7f73ad904be17dd7d1da6cc7f06b3)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

diff --git a/drivers/gpu/drm/xe/xe_query.c b/drivers/gpu/drm/xe/xe_query.c
index 75490683bad2fd7129baca74273abeec40d9e7cb..f96f2844c5bab0282608664f75c659ab171bb61a 100644 (file)
--- a/drivers/gpu/drm/xe/xe_query.c
+++ b/drivers/gpu/drm/xe/xe_query.c
@@ -490,7 +490,7 @@ 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;