------------[ cut here ]------------
[  146.617306] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  146.617446] WARNING: CPU: 1 PID: 2545 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  146.620264] Modules linked in:
[  146.620713] CPU: 1 UID: 0 PID: 2545 Comm: kunit_try_catch Tainted: G    B D W        N  6.16.0-rc4 #1 PREEMPT(voluntary) 
[  146.622020] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  146.622788] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  146.623120] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  146.623307] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 3b 3a 87 00 48 c7 c1 c0 2f bd ae 4c 89 fa 48 c7 c7 20 30 bd ae 48 89 c6 e8 72 ef 7e fe 90 <0f> 0b 90 90 e9 1c ff ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 ea
[  146.624117] RSP: 0000:ffff88810cc9fb68 EFLAGS: 00010282
[  146.624351] RAX: 0000000000000000 RBX: ffff88810cc9fc40 RCX: 1ffffffff5f24c80
[  146.624731] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  146.625101] RBP: ffff88810cc9fb90 R08: 0000000000000000 R09: fffffbfff5f24c80
[  146.625388] R10: 0000000000000003 R11: 0000000000038588 R12: ffff88810cc9fc18
[  146.625961] R13: ffff88810c529000 R14: ffff88810cbd1000 R15: ffff88810487bb80
[  146.626260] FS:  0000000000000000(0000) GS:ffff8881aa574000(0000) knlGS:0000000000000000
[  146.626929] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  146.627183] CR2: 00007ffff7ffe000 CR3: 0000000016abc000 CR4: 00000000000006f0
[  146.627543] DR0: ffffffffb0c50444 DR1: ffffffffb0c50449 DR2: ffffffffb0c5044a
[  146.627969] DR3: ffffffffb0c5044b DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  146.628245] Call Trace:
[  146.628368]  <TASK>
[  146.628632]  drm_test_framebuffer_free+0x1ab/0x610
[  146.628897]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  146.629181]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  146.629571]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  146.629883]  ? __drmm_add_action_or_reset+0x22/0x50
[  146.630091]  ? __schedule+0x10cc/0x2b60
[  146.630304]  ? __pfx_read_tsc+0x10/0x10
[  146.630609]  ? ktime_get_ts64+0x86/0x230
[  146.630784]  kunit_try_run_case+0x1a5/0x480
[  146.631026]  ? __pfx_kunit_try_run_case+0x10/0x10
[  146.631201]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  146.631388]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  146.631800]  ? __kthread_parkme+0x82/0x180
[  146.632021]  ? preempt_count_sub+0x50/0x80
[  146.632309]  ? __pfx_kunit_try_run_case+0x10/0x10
[  146.632558]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  146.632890]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  146.633147]  kthread+0x337/0x6f0
[  146.633341]  ? trace_preempt_on+0x20/0xc0
[  146.634020]  ? __pfx_kthread+0x10/0x10
[  146.634235]  ? _raw_spin_unlock_irq+0x47/0x80
[  146.634726]  ? calculate_sigpending+0x7b/0xa0
[  146.634956]  ? __pfx_kthread+0x10/0x10
[  146.635282]  ret_from_fork+0x116/0x1d0
[  146.635777]  ? __pfx_kthread+0x10/0x10
[  146.635981]  ret_from_fork_asm+0x1a/0x30
[  146.636310]  </TASK>
[  146.636439] ---[ end trace 0000000000000000 ]---