------------[ cut here ]------------
[  135.694856] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  135.694984] WARNING: CPU: 0 PID: 2523 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  135.697250] Modules linked in:
[  135.697548] CPU: 0 UID: 0 PID: 2523 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.0-rc3 #1 PREEMPT(voluntary) 
[  135.698382] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  135.698845] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  135.699118] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  135.699315] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 1b 87 84 00 48 c7 c1 20 4f fc 8a 4c 89 fa 48 c7 c7 80 4f fc 8a 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
[  135.700454] RSP: 0000:ffff888106d37b68 EFLAGS: 00010282
[  135.700777] RAX: 0000000000000000 RBX: ffff888106d37c40 RCX: 1ffffffff17a4ab4
[  135.701253] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  135.701826] RBP: ffff888106d37b90 R08: 0000000000000000 R09: fffffbfff17a4ab4
[  135.702209] R10: 0000000000000003 R11: 00000000000372b0 R12: ffff888106d37c18
[  135.702790] R13: ffff8881067c1800 R14: ffff8881041f0000 R15: ffff888106783400
[  135.703091] FS:  0000000000000000(0000) GS:ffff8881ce03b000(0000) knlGS:0000000000000000
[  135.703636] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  135.704030] CR2: 00007ffff7ffe000 CR3: 000000013ecba000 CR4: 00000000000006f0
[  135.704688] DR0: ffffffff8d088880 DR1: ffffffff8d088881 DR2: ffffffff8d088882
[  135.705056] DR3: ffffffff8d088883 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  135.705617] Call Trace:
[  135.705781]  <TASK>
[  135.706112]  drm_test_framebuffer_free+0x1ab/0x610
[  135.706562]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  135.706812]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  135.707053]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  135.707677]  ? __drmm_add_action_or_reset+0x22/0x50
[  135.708111]  ? __schedule+0x10cc/0x2b30
[  135.708635]  ? __pfx_read_tsc+0x10/0x10
[  135.708857]  ? ktime_get_ts64+0x86/0x230
[  135.709051]  kunit_try_run_case+0x1a5/0x480
[  135.709688]  ? __pfx_kunit_try_run_case+0x10/0x10
[  135.709973]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  135.710742]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  135.711161]  ? __kthread_parkme+0x82/0x180
[  135.711667]  ? preempt_count_sub+0x50/0x80
[  135.711945]  ? __pfx_kunit_try_run_case+0x10/0x10
[  135.712283]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  135.712910]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  135.713329]  kthread+0x337/0x6f0
[  135.713886]  ? trace_preempt_on+0x20/0xc0
[  135.714318]  ? __pfx_kthread+0x10/0x10
[  135.714810]  ? _raw_spin_unlock_irq+0x47/0x80
[  135.715023]  ? calculate_sigpending+0x7b/0xa0
[  135.715388]  ? __pfx_kthread+0x10/0x10
[  135.716099]  ret_from_fork+0x41/0x80
[  135.716360]  ? __pfx_kthread+0x10/0x10
[  135.716817]  ret_from_fork_asm+0x1a/0x30
[  135.717146]  </TASK>
[  135.717293] ---[ end trace 0000000000000000 ]---