------------[ cut here ]------------
[  163.339084] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  163.339211] WARNING: CPU: 0 PID: 2551 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  163.340093] Modules linked in:
[  163.340331] CPU: 0 UID: 0 PID: 2551 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.0-rc6-next-20250513 #1 PREEMPT(voluntary) 
[  163.340830] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  163.341611] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  163.341972] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  163.342353] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 eb 2f 87 00 48 c7 c1 40 17 3d 92 4c 89 fa 48 c7 c7 a0 17 3d 92 48 89 c6 e8 32 c8 7f fe 90 <0f> 0b 90 90 e9 1c ff ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 ea
[  163.343433] RSP: 0000:ffff88810cc67b68 EFLAGS: 00010282
[  163.343845] RAX: 0000000000000000 RBX: ffff88810cc67c40 RCX: 1ffffffff2624d20
[  163.344283] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  163.344819] RBP: ffff88810cc67b90 R08: 0000000000000000 R09: fffffbfff2624d20
[  163.345264] R10: 0000000000000003 R11: 0000000000037fb8 R12: ffff88810cc67c18
[  163.345759] R13: ffff88810cb8b800 R14: ffff88810c1de000 R15: ffff88810a853780
[  163.346193] FS:  0000000000000000(0000) GS:ffff8881c0477000(0000) knlGS:0000000000000000
[  163.346698] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  163.346911] CR2: 00007ffff7ffe000 CR3: 000000016d2bc000 CR4: 00000000000006f0
[  163.347437] DR0: ffffffff9444d4c0 DR1: ffffffff9444d4c1 DR2: ffffffff9444d4c3
[  163.347898] DR3: ffffffff9444d4c5 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  163.348333] Call Trace:
[  163.348648]  <TASK>
[  163.348798]  drm_test_framebuffer_free+0x1ab/0x610
[  163.349029]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  163.349485]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  163.349975]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  163.350401]  ? __drmm_add_action_or_reset+0x22/0x50
[  163.350973]  ? __schedule+0x10cc/0x2b60
[  163.351323]  ? __pfx_read_tsc+0x10/0x10
[  163.351854]  ? ktime_get_ts64+0x86/0x230
[  163.352073]  kunit_try_run_case+0x1a5/0x480
[  163.352458]  ? __pfx_kunit_try_run_case+0x10/0x10
[  163.352767]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  163.352993]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  163.353241]  ? __kthread_parkme+0x82/0x180
[  163.353436]  ? preempt_count_sub+0x50/0x80
[  163.353964]  ? __pfx_kunit_try_run_case+0x10/0x10
[  163.354163]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  163.354853]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  163.355118]  kthread+0x337/0x6f0
[  163.355310]  ? trace_preempt_on+0x20/0xc0
[  163.355514]  ? __pfx_kthread+0x10/0x10
[  163.355940]  ? _raw_spin_unlock_irq+0x47/0x80
[  163.356140]  ? calculate_sigpending+0x7b/0xa0
[  163.356431]  ? __pfx_kthread+0x10/0x10
[  163.356628]  ret_from_fork+0x116/0x1d0
[  163.356888]  ? __pfx_kthread+0x10/0x10
[  163.357083]  ret_from_fork_asm+0x1a/0x30
[  163.357300]  </TASK>
[  163.357399] ---[ end trace 0000000000000000 ]---