------------[ cut here ]------------
[  163.870338] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  163.870784] WARNING: CPU: 0 PID: 2523 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  163.872178] Modules linked in:
[  163.873119] CPU: 0 UID: 0 PID: 2523 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.5-rc2 #1 PREEMPT(voluntary) 
[  163.873960] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  163.874233] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  163.874765] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  163.875132] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 0b 86 84 00 48 c7 c1 60 5b 7c b8 4c 89 fa 48 c7 c7 c0 5b 7c b8 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
[  163.876398] RSP: 0000:ffff88810727fb68 EFLAGS: 00010282
[  163.876841] RAX: 0000000000000000 RBX: ffff88810727fc40 RCX: 1ffffffff72a4b60
[  163.877617] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  163.878088] RBP: ffff88810727fb90 R08: 0000000000000000 R09: fffffbfff72a4b60
[  163.878817] R10: 0000000000000003 R11: 0000000000036990 R12: ffff88810727fc18
[  163.879204] R13: ffff8881026c5000 R14: ffff88810251c000 R15: ffff888102799400
[  163.879797] FS:  0000000000000000(0000) GS:ffff8881a0892000(0000) knlGS:0000000000000000
[  163.880498] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  163.880926] CR2: 00007ffff7ffe000 CR3: 0000000013aba000 CR4: 00000000000006f0
[  163.881552] DR0: ffffffffba831900 DR1: ffffffffba831901 DR2: ffffffffba831902
[  163.882122] DR3: ffffffffba831903 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  163.882795] Call Trace:
[  163.883114]  <TASK>
[  163.883549]  drm_test_framebuffer_free+0x1ab/0x610
[  163.883896]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  163.884441]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  163.884878]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  163.885310]  ? __drmm_add_action_or_reset+0x22/0x50
[  163.885850]  ? __schedule+0x10cc/0x2b60
[  163.886380]  ? __pfx_read_tsc+0x10/0x10
[  163.886599]  ? ktime_get_ts64+0x86/0x230
[  163.886949]  kunit_try_run_case+0x1a5/0x480
[  163.887408]  ? __pfx_kunit_try_run_case+0x10/0x10
[  163.887841]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  163.888418]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  163.888741]  ? __kthread_parkme+0x82/0x180
[  163.889163]  ? preempt_count_sub+0x50/0x80
[  163.889748]  ? __pfx_kunit_try_run_case+0x10/0x10
[  163.890133]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  163.890668]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  163.891145]  kthread+0x337/0x6f0
[  163.891495]  ? trace_preempt_on+0x20/0xc0
[  163.891890]  ? __pfx_kthread+0x10/0x10
[  163.892197]  ? _raw_spin_unlock_irq+0x47/0x80
[  163.892767]  ? calculate_sigpending+0x7b/0xa0
[  163.893116]  ? __pfx_kthread+0x10/0x10
[  163.893646]  ret_from_fork+0x41/0x80
[  163.894078]  ? __pfx_kthread+0x10/0x10
[  163.894537]  ret_from_fork_asm+0x1a/0x30
[  163.894942]  </TASK>
[  163.895438] ---[ end trace 0000000000000000 ]---