drm/xe: Fix memory leak in xe_vm_madvise_ioctl

When check_bo_args_are_sane() validation fails, jump to the new
free_vmas cleanup label to properly free the allocated resources.
This ensures proper cleanup in this error path.

Fixes: 293032e ("drm/xe/bo: Update atomic_access attribute on madvise")
Cc: stable@vger.kernel.org # v6.18+
Reviewed-by: Shuicheng Lin <shuicheng.lin@intel.com>
Signed-off-by: Varun Gupta <varun.gupta@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patch.msgid.link/20260223175145.1532801-1-varun.gupta@intel.com
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
(cherry picked from commit 29bd06f)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

Author: guptavar

drivers/gpu/drm/xe/xe_vm_madvise.c

@@ -453,7 +453,7 @@ int xe_vm_madvise_ioctl(struct drm_device *dev, void *data, struct drm_file *fil
 						    madvise_range.num_vmas,
 						    args->atomic.val)) {
 				err = -EINVAL;
-				goto madv_fini;
+				goto free_vmas;
 			}
 		}
 
@@ -490,6 +490,7 @@ int xe_vm_madvise_ioctl(struct drm_device *dev, void *data, struct drm_file *fil
 err_fini:
 	if (madvise_range.has_bo_vmas)
 		drm_exec_fini(&exec);
+free_vmas:
 	kfree(madvise_range.vmas);
 	madvise_range.vmas = NULL;
 madv_fini: