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[  140.130784] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  140.131014] WARNING: CPU: 0 PID: 2521 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  140.132008] Modules linked in:
[  140.132261] CPU: 0 UID: 0 PID: 2521 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.4-rc3 #1 PREEMPT(voluntary) 
[  140.132772] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  140.133100] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  140.133493] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  140.133790] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 bb 84 84 00 48 c7 c1 60 5b 5c 88 4c 89 fa 48 c7 c7 c0 5b 5c 88 48 89 c6 e8 02 b0 81 fe 90 <0f> 0b 90 90 e9 1c ff ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 ea
[  140.134675] RSP: 0000:ffff888106b4fb68 EFLAGS: 00010282
[  140.135029] RAX: 0000000000000000 RBX: ffff888106b4fc40 RCX: 1ffffffff1264b60
[  140.135296] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  140.135595] RBP: ffff888106b4fb90 R08: 0000000000000000 R09: fffffbfff1264b60
[  140.135871] R10: 0000000000000003 R11: 00000000000380f0 R12: ffff888106b4fc18
[  140.136182] R13: ffff888106869000 R14: ffff888106b56000 R15: ffff88810645f400
[  140.136674] FS:  0000000000000000(0000) GS:ffff8881d0a93000(0000) knlGS:0000000000000000
[  140.137060] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  140.137393] CR2: 00007ffff7ffd000 CR3: 00000000504ba000 CR4: 00000000000006f0
[  140.137895] DR0: ffffffff8a630900 DR1: ffffffff8a630901 DR2: ffffffff8a630903
[  140.138209] DR3: ffffffff8a630905 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  140.138493] Call Trace:
[  140.138627]  <TASK>
[  140.138820]  drm_test_framebuffer_free+0x1ab/0x610
[  140.139054]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  140.139291]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  140.139527]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  140.139787]  ? __drmm_add_action_or_reset+0x22/0x50
[  140.140114]  ? __schedule+0x10cc/0x2b60
[  140.140437]  ? __pfx_read_tsc+0x10/0x10
[  140.140817]  ? ktime_get_ts64+0x86/0x230
[  140.141013]  kunit_try_run_case+0x1a5/0x480
[  140.141243]  ? __pfx_kunit_try_run_case+0x10/0x10
[  140.141414]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  140.141825]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  140.142107]  ? __kthread_parkme+0x82/0x180
[  140.142266]  ? preempt_count_sub+0x50/0x80
[  140.142497]  ? __pfx_kunit_try_run_case+0x10/0x10
[  140.142760]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  140.143019]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  140.143338]  kthread+0x337/0x6f0
[  140.143474]  ? trace_preempt_on+0x20/0xc0
[  140.143876]  ? __pfx_kthread+0x10/0x10
[  140.144243]  ? _raw_spin_unlock_irq+0x47/0x80
[  140.144469]  ? calculate_sigpending+0x7b/0xa0
[  140.144719]  ? __pfx_kthread+0x10/0x10
[  140.144950]  ret_from_fork+0x41/0x80
[  140.145174]  ? __pfx_kthread+0x10/0x10
[  140.145369]  ret_from_fork_asm+0x1a/0x30
[  140.145541]  </TASK>
[  140.145644] ---[ end trace 0000000000000000 ]---