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[  139.083346] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  139.083479] WARNING: CPU: 1 PID: 2521 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  139.084533] Modules linked in:
[  139.084937] CPU: 1 UID: 0 PID: 2521 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.7-rc1 #1 PREEMPT(voluntary) 
[  139.085385] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  139.085607] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  139.086011] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  139.086339] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 6b 8b 84 00 48 c7 c1 80 66 9c 99 4c 89 fa 48 c7 c7 e0 66 9c 99 48 89 c6 e8 b2 7a 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
[  139.087146] RSP: 0000:ffff888106e9fb68 EFLAGS: 00010282
[  139.087543] RAX: 0000000000000000 RBX: ffff888106e9fc40 RCX: 1ffffffff34e4be8
[  139.087787] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  139.088228] RBP: ffff888106e9fb90 R08: 0000000000000000 R09: fffffbfff34e4be8
[  139.088502] R10: 0000000000000003 R11: 0000000000037280 R12: ffff888106e9fc18
[  139.088832] R13: ffff888103d92800 R14: ffff888103d9a000 R15: ffff888106f01180
[  139.089167] FS:  0000000000000000(0000) GS:ffff8881bf790000(0000) knlGS:0000000000000000
[  139.089437] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  139.089695] CR2: 00007ffff7ffe000 CR3: 00000001348ba000 CR4: 00000000000006f0
[  139.090055] DR0: ffffffff9ba33900 DR1: ffffffff9ba33901 DR2: ffffffff9ba33903
[  139.090272] DR3: ffffffff9ba33905 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  139.090589] Call Trace:
[  139.090720]  <TASK>
[  139.090853]  drm_test_framebuffer_free+0x1ab/0x610
[  139.091508]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  139.092781]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  139.093071]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  139.093305]  ? __drmm_add_action_or_reset+0x22/0x50
[  139.093547]  ? __schedule+0x10cc/0x2b60
[  139.093800]  ? __pfx_read_tsc+0x10/0x10
[  139.094363]  ? ktime_get_ts64+0x86/0x230
[  139.094567]  kunit_try_run_case+0x1a5/0x480
[  139.094920]  ? __pfx_kunit_try_run_case+0x10/0x10
[  139.095139]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  139.095559]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  139.095911]  ? __kthread_parkme+0x82/0x180
[  139.096161]  ? preempt_count_sub+0x50/0x80
[  139.096506]  ? __pfx_kunit_try_run_case+0x10/0x10
[  139.096886]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  139.097228]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  139.097507]  kthread+0x337/0x6f0
[  139.097992]  ? trace_preempt_on+0x20/0xc0
[  139.098191]  ? __pfx_kthread+0x10/0x10
[  139.098375]  ? _raw_spin_unlock_irq+0x47/0x80
[  139.098571]  ? calculate_sigpending+0x7b/0xa0
[  139.098822]  ? __pfx_kthread+0x10/0x10
[  139.099072]  ret_from_fork+0x41/0x80
[  139.099402]  ? __pfx_kthread+0x10/0x10
[  139.099669]  ret_from_fork_asm+0x1a/0x30
[  139.100141]  </TASK>
[  139.100295] ---[ end trace 0000000000000000 ]---