------------[ cut here ]------------
[  142.998381] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  142.998955] WARNING: CPU: 1 PID: 2522 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  143.000225] Modules linked in:
[  143.000775] CPU: 1 UID: 0 PID: 2522 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.5-rc1 #1 PREEMPT(voluntary) 
[  143.001425] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  143.001707] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  143.002096] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  143.002396] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 0b 86 84 00 48 c7 c1 60 5b 5c 95 4c 89 fa 48 c7 c7 c0 5b 5c 95 48 89 c6 e8 02 a1 81 fe 90 <0f> 0b 90 90 e9 1c ff ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 ea
[  143.003397] RSP: 0000:ffff888102337b68 EFLAGS: 00010282
[  143.003644] RAX: 0000000000000000 RBX: ffff888102337c40 RCX: 1ffffffff2c64b60
[  143.003957] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  143.004251] RBP: ffff888102337b90 R08: 0000000000000000 R09: fffffbfff2c64b60
[  143.004790] R10: 0000000000000003 R11: 0000000000037748 R12: ffff888102337c18
[  143.005112] R13: ffff888101b64800 R14: ffff8881023f0000 R15: ffff888108414a80
[  143.005487] FS:  0000000000000000(0000) GS:ffff8881c3b92000(0000) knlGS:0000000000000000
[  143.006120] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  143.006466] CR2: 00007ffff7ffe000 CR3: 000000012a8ba000 CR4: 00000000000006f0
[  143.006774] DR0: ffffffff97631904 DR1: ffffffff97631909 DR2: ffffffff9763190a
[  143.007097] DR3: ffffffff9763190b DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  143.007400] Call Trace:
[  143.007667]  <TASK>
[  143.007860]  drm_test_framebuffer_free+0x1ab/0x610
[  143.008046]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  143.008342]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  143.008797]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  143.009093]  ? __drmm_add_action_or_reset+0x22/0x50
[  143.009583]  ? __schedule+0x10cc/0x2b60
[  143.009756]  ? __pfx_read_tsc+0x10/0x10
[  143.010036]  ? ktime_get_ts64+0x86/0x230
[  143.010263]  kunit_try_run_case+0x1a5/0x480
[  143.010546]  ? __pfx_kunit_try_run_case+0x10/0x10
[  143.011039]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  143.011325]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  143.011667]  ? __kthread_parkme+0x82/0x180
[  143.011912]  ? preempt_count_sub+0x50/0x80
[  143.012131]  ? __pfx_kunit_try_run_case+0x10/0x10
[  143.012604]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  143.012869]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  143.013178]  kthread+0x337/0x6f0
[  143.013430]  ? trace_preempt_on+0x20/0xc0
[  143.013624]  ? __pfx_kthread+0x10/0x10
[  143.014159]  ? _raw_spin_unlock_irq+0x47/0x80
[  143.014509]  ? calculate_sigpending+0x7b/0xa0
[  143.014768]  ? __pfx_kthread+0x10/0x10
[  143.014993]  ret_from_fork+0x41/0x80
[  143.015199]  ? __pfx_kthread+0x10/0x10
[  143.015435]  ret_from_fork_asm+0x1a/0x30
[  143.015799]  </TASK>
[  143.015937] ---[ end trace 0000000000000000 ]---