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[  200.137525] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  200.137675] WARNING: drivers/gpu/drm/drm_framebuffer.c:832 at drm_framebuffer_free+0x13f/0x1c0, CPU#1: kunit_try_catch/2651
[  200.138761] Modules linked in:
[  200.138976] CPU: 1 UID: 0 PID: 2651 Comm: kunit_try_catch Tainted: G    B D W        N  6.16.0-rc4-next-20250704 #1 PREEMPT(voluntary) 
[  200.139921] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  200.140131] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  200.140818] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  200.141247] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 3b f5 88 00 48 c7 c1 a0 da 1f ac 4c 89 fa 48 c7 c7 00 db 1f ac 48 89 c6 e8 22 ed 79 fe 90 <0f> 0b 90 90 e9 1c ff ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 ea
[  200.143216] RSP: 0000:ffff888105db7b68 EFLAGS: 00010282
[  200.143758] RAX: 0000000000000000 RBX: ffff888105db7c40 RCX: 1ffffffff59e4ad4
[  200.143998] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  200.144228] RBP: ffff888105db7b90 R08: 0000000000000000 R09: fffffbfff59e4ad4
[  200.144480] R10: 0000000000000003 R11: 0000000000039d78 R12: ffff888105db7c18
[  200.144745] R13: ffff888105ef8800 R14: ffff88810493c000 R15: ffff88810972bf00
[  200.145360] FS:  0000000000000000(0000) GS:ffff8881acf24000(0000) knlGS:0000000000000000
[  200.145789] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  200.146359] CR2: 00007ffff7ffe000 CR3: 0000000131ebc000 CR4: 00000000000006f0
[  200.146730] DR0: ffffffffae2a2484 DR1: ffffffffae2a2489 DR2: ffffffffae2a248a
[  200.147059] DR3: ffffffffae2a248b DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  200.147469] Call Trace:
[  200.147713]  <TASK>
[  200.147937]  drm_test_framebuffer_free+0x1ab/0x610
[  200.148325]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  200.148676]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  200.148904]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  200.149264]  ? __drmm_add_action_or_reset+0x22/0x50
[  200.149579]  ? __schedule+0x10cc/0x2b60
[  200.149824]  ? __pfx_read_tsc+0x10/0x10
[  200.150245]  ? ktime_get_ts64+0x86/0x230
[  200.150568]  kunit_try_run_case+0x1a5/0x480
[  200.150834]  ? __pfx_kunit_try_run_case+0x10/0x10
[  200.151076]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  200.151384]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  200.151718]  ? __kthread_parkme+0x82/0x180
[  200.151936]  ? preempt_count_sub+0x50/0x80
[  200.152170]  ? __pfx_kunit_try_run_case+0x10/0x10
[  200.152661]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  200.152947]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  200.153442]  kthread+0x337/0x6f0
[  200.153703]  ? trace_preempt_on+0x20/0xc0
[  200.154023]  ? __pfx_kthread+0x10/0x10
[  200.154199]  ? _raw_spin_unlock_irq+0x47/0x80
[  200.154555]  ? calculate_sigpending+0x7b/0xa0
[  200.154722]  ? __pfx_kthread+0x10/0x10
[  200.155123]  ret_from_fork+0x116/0x1d0
[  200.155671]  ? __pfx_kthread+0x10/0x10
[  200.155895]  ret_from_fork_asm+0x1a/0x30
[  200.156095]  </TASK>
[  200.156686] ---[ end trace 0000000000000000 ]---