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It is possible that both dev->master and file_priv->master are NULL when passed to drm_master_release, which would result in dev being passed to drm_drop_master (as NULL == NULL here). This would result in a NULL pointer dereference when passing dev->master to drm_master_put in drm_drop_master. Only call drm_drop_master if dev->master exists. Also, make sure the original calling requirement is maintained (dev->master == file_priv->master). This fixes a static analysis issue. Signed-off-by: Jonathan Cavitt <jonathan.cavitt@intel.com> Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Maxime Ripard <mripard@kernel.org> Cc: Thomas Zimmermann <tzimmermann@suse.de> Cc: David Airlie <airlied@gmail.com> Cc: Simona Vetter <simona@ffwll.ch> Acked-by: Luben Tuikov <ltuikov89@gmail.com> Reviewed-by: Maciej Patelczyk <maciej.patelczyk@intel.com> Link: https://patch.msgid.link/20260416210047.3904106-1-jonathan.cavitt@intel.com