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[  198.163736] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  198.163877] WARNING: drivers/gpu/drm/drm_framebuffer.c:833 at drm_framebuffer_free+0x13f/0x1c0, CPU#1: kunit_try_catch/2731
[  198.164888] Modules linked in:
[  198.165266] CPU: 1 UID: 0 PID: 2731 Comm: kunit_try_catch Tainted: G    B D W        N  6.16.0-rc7-next-20250723 #1 PREEMPT(voluntary) 
[  198.165910] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  198.166192] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  198.166612] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  198.167066] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 1b 06 89 00 48 c7 c1 e0 35 a0 90 4c 89 fa 48 c7 c7 40 36 a0 90 48 89 c6 e8 62 49 77 fe 90 <0f> 0b 90 90 e9 1c ff ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 ea
[  198.167837] RSP: 0000:ffff888103b0fb68 EFLAGS: 00010282
[  198.168048] RAX: 0000000000000000 RBX: ffff888103b0fc40 RCX: 1ffffffff22e4aac
[  198.168354] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  198.168602] RBP: ffff888103b0fb90 R08: 0000000000000000 R09: fffffbfff22e4aac
[  198.168915] R10: 0000000000000003 R11: 00000000000490d0 R12: ffff888103b0fc18
[  198.169294] R13: ffff8881061a9800 R14: ffff88810370d000 R15: ffff8881077e4f80
[  198.169815] FS:  0000000000000000(0000) GS:ffff8881c870d000(0000) knlGS:0000000000000000
[  198.170190] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  198.170422] CR2: 00007ffff7ffe000 CR3: 000000001e2bc000 CR4: 00000000000006f0
[  198.170818] DR0: ffffffff92ab9580 DR1: ffffffff92ab9581 DR2: ffffffff92ab9583
[  198.171115] DR3: ffffffff92ab9585 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  198.171526] Call Trace:
[  198.171639]  <TASK>
[  198.171740]  drm_test_framebuffer_free+0x1ab/0x610
[  198.172026]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  198.172419]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  198.172783]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  198.172960]  ? __drmm_add_action_or_reset+0x22/0x50
[  198.173911]  ? __schedule+0x10da/0x2b60
[  198.174123]  ? __pfx_read_tsc+0x10/0x10
[  198.174304]  ? ktime_get_ts64+0x86/0x230
[  198.174487]  kunit_try_run_case+0x1a5/0x480
[  198.174800]  ? __pfx_kunit_try_run_case+0x10/0x10
[  198.175089]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  198.175253]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  198.175667]  ? __kthread_parkme+0x82/0x180
[  198.175951]  ? preempt_count_sub+0x50/0x80
[  198.176178]  ? __pfx_kunit_try_run_case+0x10/0x10
[  198.176560]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  198.176810]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  198.177233]  kthread+0x337/0x6f0
[  198.177414]  ? trace_preempt_on+0x20/0xc0
[  198.177904]  ? __pfx_kthread+0x10/0x10
[  198.178091]  ? _raw_spin_unlock_irq+0x47/0x80
[  198.178341]  ? calculate_sigpending+0x7b/0xa0
[  198.178653]  ? __pfx_kthread+0x10/0x10
[  198.179003]  ret_from_fork+0x116/0x1d0
[  198.179265]  ? __pfx_kthread+0x10/0x10
[  198.179513]  ret_from_fork_asm+0x1a/0x30
[  198.180008]  </TASK>
[  198.180145] ---[ end trace 0000000000000000 ]---