------------[ cut here ]------------
[  193.505203] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  193.505992] WARNING: CPU: 0 PID: 2522 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  193.507708] Modules linked in:
[  193.508103] CPU: 0 UID: 0 PID: 2522 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.0-rc3 #1 PREEMPT(voluntary) 
[  193.509630] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  193.510282] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  193.511564] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  193.512011] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 1b 87 84 00 48 c7 c1 20 4f bc 9a 4c 89 fa 48 c7 c7 80 4f bc 9a 48 89 c6 e8 62 0f 82 fe 90 <0f> 0b 90 90 e9 1c ff ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 ea
[  193.513139] RSP: 0000:ffff8881044a7b68 EFLAGS: 00010282
[  193.513921] RAX: 0000000000000000 RBX: ffff8881044a7c40 RCX: 1ffffffff3724ab4
[  193.514659] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  193.515168] RBP: ffff8881044a7b90 R08: 0000000000000000 R09: fffffbfff3724ab4
[  193.515739] R10: 0000000000000003 R11: 0000000000036a08 R12: ffff8881044a7c18
[  193.516850] R13: ffff8881086a0800 R14: ffff888105aad000 R15: ffff888108b5a500
[  193.517629] FS:  0000000000000000(0000) GS:ffff8881be43b000(0000) knlGS:0000000000000000
[  193.518334] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  193.518961] CR2: ffffffffffffffff CR3: 000000005a0ba000 CR4: 00000000000006f0
[  193.519559] DR0: ffffffff9cc88880 DR1: ffffffff9cc88881 DR2: ffffffff9cc88882
[  193.520113] DR3: ffffffff9cc88883 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  193.521276] Call Trace:
[  193.521753]  <TASK>
[  193.522057]  drm_test_framebuffer_free+0x1ab/0x610
[  193.522804]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  193.523311]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  193.524032]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  193.524976]  ? __drmm_add_action_or_reset+0x22/0x50
[  193.525603]  ? __schedule+0x10cc/0x2b30
[  193.526312]  ? __pfx_read_tsc+0x10/0x10
[  193.526812]  ? ktime_get_ts64+0x86/0x230
[  193.527381]  kunit_try_run_case+0x1a5/0x480
[  193.528122]  ? __pfx_kunit_try_run_case+0x10/0x10
[  193.528823]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  193.529265]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  193.530339]  ? __kthread_parkme+0x82/0x180
[  193.531205]  ? preempt_count_sub+0x50/0x80
[  193.531842]  ? __pfx_kunit_try_run_case+0x10/0x10
[  193.532289]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  193.532781]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  193.533555]  kthread+0x337/0x6f0
[  193.533892]  ? trace_preempt_on+0x20/0xc0
[  193.534394]  ? __pfx_kthread+0x10/0x10
[  193.535210]  ? _raw_spin_unlock_irq+0x47/0x80
[  193.535957]  ? calculate_sigpending+0x7b/0xa0
[  193.536579]  ? __pfx_kthread+0x10/0x10
[  193.537397]  ret_from_fork+0x41/0x80
[  193.538163]  ? __pfx_kthread+0x10/0x10
[  193.538708]  ret_from_fork_asm+0x1a/0x30
[  193.539240]  </TASK>
[  193.539671] ---[ end trace 0000000000000000 ]---