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[  139.999454] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  139.999583] WARNING: CPU: 0 PID: 2545 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  140.001836] Modules linked in:
[  140.002010] CPU: 0 UID: 0 PID: 2545 Comm: kunit_try_catch Tainted: G    B D W        N  6.16.0-rc5 #1 PREEMPT(voluntary) 
[  140.002329] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  140.002500] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  140.003512] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  140.004916] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 3b 3a 87 00 48 c7 c1 c0 38 bd 8c 4c 89 fa 48 c7 c7 20 39 bd 8c 48 89 c6 e8 c2 eb 7e fe 90 <0f> 0b 90 90 e9 1c ff ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 ea
[  140.007171] RSP: 0000:ffff88810401fb68 EFLAGS: 00010282
[  140.007747] RAX: 0000000000000000 RBX: ffff88810401fc40 RCX: 1ffffffff1b24ce8
[  140.008919] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  140.009509] RBP: ffff88810401fb90 R08: 0000000000000000 R09: fffffbfff1b24ce8
[  140.010143] R10: 0000000000000003 R11: 0000000000037278 R12: ffff88810401fc18
[  140.010367] R13: ffff88810dc4d800 R14: ffff88810e371000 R15: ffff88810c3d0f00
[  140.010579] FS:  0000000000000000(0000) GS:ffff8881cc472000(0000) knlGS:0000000000000000
[  140.010837] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  140.011180] CR2: 00007ffff7ffe000 CR3: 000000002febc000 CR4: 00000000000006f0
[  140.011503] DR0: ffffffff8ec52440 DR1: ffffffff8ec52441 DR2: ffffffff8ec52442
[  140.011749] DR3: ffffffff8ec52443 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  140.012190] Call Trace:
[  140.012598]  <TASK>
[  140.012742]  drm_test_framebuffer_free+0x1ab/0x610
[  140.012985]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  140.013315]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  140.013567]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  140.013981]  ? __drmm_add_action_or_reset+0x22/0x50
[  140.014311]  ? __schedule+0x10cc/0x2b60
[  140.014510]  ? __pfx_read_tsc+0x10/0x10
[  140.014739]  ? ktime_get_ts64+0x86/0x230
[  140.014908]  kunit_try_run_case+0x1a5/0x480
[  140.015224]  ? __pfx_kunit_try_run_case+0x10/0x10
[  140.015419]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  140.015696]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  140.015900]  ? __kthread_parkme+0x82/0x180
[  140.016230]  ? preempt_count_sub+0x50/0x80
[  140.016469]  ? __pfx_kunit_try_run_case+0x10/0x10
[  140.016784]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  140.016990]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  140.017453]  kthread+0x337/0x6f0
[  140.017700]  ? trace_preempt_on+0x20/0xc0
[  140.017915]  ? __pfx_kthread+0x10/0x10
[  140.018233]  ? _raw_spin_unlock_irq+0x47/0x80
[  140.018389]  ? calculate_sigpending+0x7b/0xa0
[  140.018609]  ? __pfx_kthread+0x10/0x10
[  140.018819]  ret_from_fork+0x116/0x1d0
[  140.019136]  ? __pfx_kthread+0x10/0x10
[  140.019282]  ret_from_fork_asm+0x1a/0x30
[  140.019491]  </TASK>
[  140.019634] ---[ end trace 0000000000000000 ]---