------------[ cut here ]------------
[  184.686126] WARNING: CPU: 1 PID: 2833 at drivers/gpu/drm/drm_gem_shmem_helper.c:180 drm_gem_shmem_free+0x74c/0x95c
[  184.697082] drm-kunit-mock-device drm_gem_shmem_test_get_pages_sgt.drm-kunit-mock-device: [drm] drm_WARN_ON(refcount_read(&shmem->pages_pin_count))
[  184.697082] Modules linked in:
[  184.713500] CPU: 1 UID: 0 PID: 2833 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.0-next-20250530 #1 NONE 
[  184.713531] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  184.713531] Hardware name: Generic DRA74X (Flattened Device Tree)
[  184.713562] Call trace: 
[  184.713562]  unwind_backtrace from show_stack+0x18/0x1c
[  184.713592]  show_stack from dump_stack_lvl+0x70/0x90
[  184.713623]  dump_stack_lvl from __warn+0x154/0x2e0
[  184.713653]  __warn from warn_slowpath_fmt+0x200/0x258
[  184.713653]  warn_slowpath_fmt from drm_gem_shmem_free+0x74c/0x95c
[  184.713684]  drm_gem_shmem_free from kunit_remove_resource+0x1ac/0x264
[  184.713714]  kunit_remove_resource from kunit_cleanup+0x78/0x13c
[  184.713745]  kunit_cleanup from kunit_generic_run_threadfn_adapter+0xc4/0x128
[  184.713775]  kunit_generic_run_threadfn_adapter from kthread+0x464/0x810
[  184.713775]  kthread from ret_from_fork+0x14/0x20
[  184.713806] Exception stack(0xf20cbfb0 to 0xf20cbff8)
[  184.713806] bfa0:                                     00000000 00000000 00000000 00000000
[  184.713836] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[  184.713836] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000
[  184.713836] ---[ end trace 0000000000000000 ]---