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[  168.631602] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  168.632437] WARNING: CPU: 0 PID: 2599 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  168.634528] Modules linked in:
[  168.635103] CPU: 0 UID: 0 PID: 2599 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.0-next-20250603 #1 PREEMPT(voluntary) 
[  168.635773] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  168.636368] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  168.637039] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  168.637342] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 cb 41 87 00 48 c7 c1 60 cd 3d 8d 4c 89 fa 48 c7 c7 c0 cd 3d 8d 48 89 c6 e8 c2 db 7a fe 90 <0f> 0b 90 90 e9 1c ff ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 ea
[  168.638187] RSP: 0000:ffff8881011efb68 EFLAGS: 00010282
[  168.638908] RAX: 0000000000000000 RBX: ffff8881011efc40 RCX: 1ffffffff1c24c5c
[  168.639375] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  168.640155] RBP: ffff8881011efb90 R08: 0000000000000000 R09: fffffbfff1c24c5c
[  168.640553] R10: 0000000000000003 R11: 0000000000037ad0 R12: ffff8881011efc18
[  168.641205] R13: ffff888100f73000 R14: ffff888103a73000 R15: ffff888106586a00
[  168.641885] FS:  0000000000000000(0000) GS:ffff8881cbc5b000(0000) knlGS:0000000000000000
[  168.642362] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  168.642895] CR2: 00007ffff7ffe000 CR3: 00000000780bc000 CR4: 00000000000006f0
[  168.643245] DR0: ffffffff8f469400 DR1: ffffffff8f469401 DR2: ffffffff8f469402
[  168.643499] DR3: ffffffff8f469403 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  168.644306] Call Trace:
[  168.644529]  <TASK>
[  168.644908]  drm_test_framebuffer_free+0x1ab/0x610
[  168.645409]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  168.645818]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  168.646322]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  168.646675]  ? __drmm_add_action_or_reset+0x22/0x50
[  168.647133]  ? __schedule+0x10cc/0x2b60
[  168.647596]  ? __pfx_read_tsc+0x10/0x10
[  168.647888]  ? ktime_get_ts64+0x86/0x230
[  168.648646]  kunit_try_run_case+0x1a5/0x480
[  168.649146]  ? __pfx_kunit_try_run_case+0x10/0x10
[  168.649351]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  168.649602]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  168.650580]  ? __kthread_parkme+0x82/0x180
[  168.651014]  ? preempt_count_sub+0x50/0x80
[  168.651492]  ? __pfx_kunit_try_run_case+0x10/0x10
[  168.651716]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  168.652311]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  168.652678]  kthread+0x337/0x6f0
[  168.653037]  ? trace_preempt_on+0x20/0xc0
[  168.654181]  ? __pfx_kthread+0x10/0x10
[  168.654471]  ? _raw_spin_unlock_irq+0x47/0x80
[  168.654810]  ? calculate_sigpending+0x7b/0xa0
[  168.655418]  ? __pfx_kthread+0x10/0x10
[  168.655676]  ret_from_fork+0x116/0x1d0
[  168.656120]  ? __pfx_kthread+0x10/0x10
[  168.656452]  ret_from_fork_asm+0x1a/0x30
[  168.657051]  </TASK>
[  168.657307] ---[ end trace 0000000000000000 ]---