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[  161.099000] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  161.099255] WARNING: CPU: 1 PID: 2552 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  161.100816] Modules linked in:
[  161.101374] CPU: 1 UID: 0 PID: 2552 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.0-rc6-next-20250515 #1 PREEMPT(voluntary) 
[  161.102111] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  161.102691] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  161.103415] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  161.103846] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 eb 2f 87 00 48 c7 c1 80 14 7d a8 4c 89 fa 48 c7 c7 e0 14 7d a8 48 89 c6 e8 92 c2 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
[  161.105392] RSP: 0000:ffff888105aa7b68 EFLAGS: 00010282
[  161.105880] RAX: 0000000000000000 RBX: ffff888105aa7c40 RCX: 1ffffffff52a4d18
[  161.106963] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  161.107321] RBP: ffff888105aa7b90 R08: 0000000000000000 R09: fffffbfff52a4d18
[  161.107723] R10: 0000000000000003 R11: 0000000000037be8 R12: ffff888105aa7c18
[  161.108198] R13: ffff888109f56000 R14: ffff888105977000 R15: ffff88810b4c5080
[  161.109074] FS:  0000000000000000(0000) GS:ffff8881b0976000(0000) knlGS:0000000000000000
[  161.109633] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  161.109903] CR2: 00007ffff7ffe000 CR3: 000000002bebc000 CR4: 00000000000006f0
[  161.110343] DR0: ffffffffaa84e480 DR1: ffffffffaa84e481 DR2: ffffffffaa84e483
[  161.111416] DR3: ffffffffaa84e485 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  161.111987] Call Trace:
[  161.112379]  <TASK>
[  161.112887]  drm_test_framebuffer_free+0x1ab/0x610
[  161.113349]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  161.113989]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  161.114304]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  161.115075]  ? __drmm_add_action_or_reset+0x22/0x50
[  161.115683]  ? __schedule+0x10cc/0x2b60
[  161.116142]  ? __pfx_read_tsc+0x10/0x10
[  161.116667]  ? ktime_get_ts64+0x86/0x230
[  161.116965]  kunit_try_run_case+0x1a5/0x480
[  161.117174]  ? __pfx_kunit_try_run_case+0x10/0x10
[  161.117761]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  161.118215]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  161.118669]  ? __kthread_parkme+0x82/0x180
[  161.119128]  ? preempt_count_sub+0x50/0x80
[  161.119711]  ? __pfx_kunit_try_run_case+0x10/0x10
[  161.120049]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  161.120657]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  161.120927]  kthread+0x337/0x6f0
[  161.121135]  ? trace_preempt_on+0x20/0xc0
[  161.121517]  ? __pfx_kthread+0x10/0x10
[  161.121876]  ? _raw_spin_unlock_irq+0x47/0x80
[  161.123439]  ? calculate_sigpending+0x7b/0xa0
[  161.124076]  ? __pfx_kthread+0x10/0x10
[  161.124635]  ret_from_fork+0x116/0x1d0
[  161.125001]  ? __pfx_kthread+0x10/0x10
[  161.125323]  ret_from_fork_asm+0x1a/0x30
[  161.125754]  </TASK>
[  161.126012] ---[ end trace 0000000000000000 ]---