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[  173.529088] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  173.529490] WARNING: CPU: 0 PID: 2551 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  173.531961] Modules linked in:
[  173.532482] CPU: 0 UID: 0 PID: 2551 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.0-rc6-next-20250512 #1 PREEMPT(voluntary) 
[  173.533294] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  173.533750] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  173.534223] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  173.534896] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 6b 30 87 00 48 c7 c1 00 10 1d 91 4c 89 fa 48 c7 c7 60 10 1d 91 48 89 c6 e8 42 be 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
[  173.536180] RSP: 0000:ffff888109a2fb68 EFLAGS: 00010282
[  173.536556] RAX: 0000000000000000 RBX: ffff888109a2fc40 RCX: 1ffffffff23e4c90
[  173.536958] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  173.537718] RBP: ffff888109a2fb90 R08: 0000000000000000 R09: fffffbfff23e4c90
[  173.538226] R10: 0000000000000003 R11: 0000000000037ef0 R12: ffff888109a2fc18
[  173.538711] R13: ffff888109b32000 R14: ffff888109891000 R15: ffff888101566a80
[  173.538971] FS:  0000000000000000(0000) GS:ffff8881c7e77000(0000) knlGS:0000000000000000
[  173.539792] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  173.540286] CR2: ffffffffffffffff CR3: 000000013debc000 CR4: 00000000000006f0
[  173.540873] DR0: ffffffff9324d4c0 DR1: ffffffff9324d4c1 DR2: ffffffff9324d4c3
[  173.541423] DR3: ffffffff9324d4c5 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  173.541958] Call Trace:
[  173.542345]  <TASK>
[  173.542663]  drm_test_framebuffer_free+0x1ab/0x610
[  173.543443]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  173.543839]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  173.544404]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  173.544861]  ? __drmm_add_action_or_reset+0x22/0x50
[  173.545555]  ? __schedule+0x10cc/0x2b60
[  173.545978]  ? __pfx_read_tsc+0x10/0x10
[  173.546229]  ? ktime_get_ts64+0x86/0x230
[  173.546605]  kunit_try_run_case+0x1a5/0x480
[  173.546984]  ? __pfx_kunit_try_run_case+0x10/0x10
[  173.547814]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  173.548362]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  173.548809]  ? __kthread_parkme+0x82/0x180
[  173.549263]  ? preempt_count_sub+0x50/0x80
[  173.549715]  ? __pfx_kunit_try_run_case+0x10/0x10
[  173.549998]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  173.550498]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  173.550966]  kthread+0x337/0x6f0
[  173.551469]  ? trace_preempt_on+0x20/0xc0
[  173.551848]  ? __pfx_kthread+0x10/0x10
[  173.552388]  ? _raw_spin_unlock_irq+0x47/0x80
[  173.552700]  ? calculate_sigpending+0x7b/0xa0
[  173.553285]  ? __pfx_kthread+0x10/0x10
[  173.553623]  ret_from_fork+0x116/0x1d0
[  173.553955]  ? __pfx_kthread+0x10/0x10
[  173.554472]  ret_from_fork_asm+0x1a/0x30
[  173.554917]  </TASK>
[  173.555304] ---[ end trace 0000000000000000 ]---