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[  143.274318] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  143.274445] WARNING: CPU: 1 PID: 2522 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  143.275942] Modules linked in:
[  143.276371] CPU: 1 UID: 0 PID: 2522 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.6-rc1 #1 PREEMPT(voluntary) 
[  143.277642] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  143.278246] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  143.279149] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  143.279454] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 1b 7f 84 00 48 c7 c1 00 66 7c 94 4c 89 fa 48 c7 c7 60 66 7c 94 48 89 c6 e8 62 72 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
[  143.281055] RSP: 0000:ffff888102697b68 EFLAGS: 00010282
[  143.281288] RAX: 0000000000000000 RBX: ffff888102697c40 RCX: 1ffffffff2aa4bd0
[  143.281504] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  143.281715] RBP: ffff888102697b90 R08: 0000000000000000 R09: fffffbfff2aa4bd0
[  143.282282] R10: 0000000000000003 R11: 0000000000037870 R12: ffff888102697c18
[  143.282750] R13: ffff8881025b7000 R14: ffff888101194000 R15: ffff888102d43580
[  143.283111] FS:  0000000000000000(0000) GS:ffff8881c4990000(0000) knlGS:0000000000000000
[  143.283462] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  143.283705] CR2: 00007ffff7ffe000 CR3: 00000000720ba000 CR4: 00000000000006f0
[  143.284091] DR0: ffffffff96833900 DR1: ffffffff96833901 DR2: ffffffff96833903
[  143.284365] DR3: ffffffff96833905 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  143.284804] Call Trace:
[  143.285062]  <TASK>
[  143.285210]  drm_test_framebuffer_free+0x1ab/0x610
[  143.285438]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  143.285672]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  143.285923]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  143.286453]  ? __drmm_add_action_or_reset+0x22/0x50
[  143.286759]  ? __schedule+0x10cc/0x2b60
[  143.286933]  ? __pfx_read_tsc+0x10/0x10
[  143.287210]  ? ktime_get_ts64+0x86/0x230
[  143.287501]  kunit_try_run_case+0x1a5/0x480
[  143.287681]  ? __pfx_kunit_try_run_case+0x10/0x10
[  143.288154]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  143.288396]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  143.288675]  ? __kthread_parkme+0x82/0x180
[  143.288844]  ? preempt_count_sub+0x50/0x80
[  143.289181]  ? __pfx_kunit_try_run_case+0x10/0x10
[  143.289484]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  143.290039]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  143.290261]  kthread+0x337/0x6f0
[  143.290442]  ? trace_preempt_on+0x20/0xc0
[  143.290706]  ? __pfx_kthread+0x10/0x10
[  143.291074]  ? _raw_spin_unlock_irq+0x47/0x80
[  143.291311]  ? calculate_sigpending+0x7b/0xa0
[  143.291506]  ? __pfx_kthread+0x10/0x10
[  143.291804]  ret_from_fork+0x41/0x80
[  143.292135]  ? __pfx_kthread+0x10/0x10
[  143.292301]  ret_from_fork_asm+0x1a/0x30
[  143.292590]  </TASK>
[  143.292722] ---[ end trace 0000000000000000 ]---