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[  176.466514] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  176.466619] WARNING: drivers/gpu/drm/drm_framebuffer.c:832 at drm_framebuffer_free+0x13f/0x1c0, CPU#0: kunit_try_catch/2584
[  176.468375] Modules linked in:
[  176.468819] CPU: 0 UID: 0 PID: 2584 Comm: kunit_try_catch Tainted: G    B D W        N  6.16.0-rc5-next-20250709 #1 PREEMPT(voluntary) 
[  176.469831] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  176.470218] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  176.470783] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  176.471323] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 bb fc 88 00 48 c7 c1 e0 49 df 91 4c 89 fa 48 c7 c7 40 4a df 91 48 89 c6 e8 72 a2 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
[  176.472355] RSP: 0000:ffff88810d5dfb68 EFLAGS: 00010282
[  176.472611] RAX: 0000000000000000 RBX: ffff88810d5dfc40 RCX: 1ffffffff2564b68
[  176.473185] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  176.473622] RBP: ffff88810d5dfb90 R08: 0000000000000000 R09: fffffbfff2564b68
[  176.474272] R10: 0000000000000003 R11: 000000000003ac40 R12: ffff88810d5dfc18
[  176.474754] R13: ffff88810d5c5800 R14: ffff88810d19a000 R15: ffff8881064b5500
[  176.475321] FS:  0000000000000000(0000) GS:ffff8881c722b000(0000) knlGS:0000000000000000
[  176.475834] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  176.476393] CR2: ffff88815a94a000 CR3: 000000012a2bc000 CR4: 00000000000006f0
[  176.476858] DR0: ffffffff93e9b500 DR1: ffffffff93e9b501 DR2: ffffffff93e9b503
[  176.477364] DR3: ffffffff93e9b505 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  176.477821] Call Trace:
[  176.478160]  <TASK>
[  176.478431]  drm_test_framebuffer_free+0x1ab/0x610
[  176.478859]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  176.479299]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  176.479704]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  176.480134]  ? __drmm_add_action_or_reset+0x22/0x50
[  176.480510]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  176.480817]  kunit_try_run_case+0x1a5/0x480
[  176.481322]  ? __pfx_kunit_try_run_case+0x10/0x10
[  176.481637]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  176.482175]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  176.482563]  ? __kthread_parkme+0x82/0x180
[  176.483012]  ? preempt_count_sub+0x50/0x80
[  176.483354]  ? __pfx_kunit_try_run_case+0x10/0x10
[  176.483761]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  176.484168]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  176.484600]  kthread+0x337/0x6f0
[  176.485007]  ? trace_preempt_on+0x20/0xc0
[  176.485205]  ? __pfx_kthread+0x10/0x10
[  176.485637]  ? _raw_spin_unlock_irq+0x47/0x80
[  176.486100]  ? calculate_sigpending+0x7b/0xa0
[  176.486447]  ? __pfx_kthread+0x10/0x10
[  176.486833]  ret_from_fork+0x116/0x1d0
[  176.487421]  ? __pfx_kthread+0x10/0x10
[  176.487800]  ret_from_fork_asm+0x1a/0x30
[  176.488042]  </TASK>
[  176.488282] ---[ end trace 0000000000000000 ]---