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[  145.782990] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  145.783120] WARNING: CPU: 1 PID: 2521 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  145.786046] Modules linked in:
[  145.786511] CPU: 1 UID: 0 PID: 2521 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.0-rc7 #1 PREEMPT(voluntary) 
[  145.787310] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  145.787511] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  145.787889] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  145.788381] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 6b 80 84 00 48 c7 c1 a0 55 fc a2 4c 89 fa 48 c7 c7 00 56 fc a2 48 89 c6 e8 a2 d8 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
[  145.789363] RSP: 0000:ffff8881053ffb68 EFLAGS: 00010282
[  145.789655] RAX: 0000000000000000 RBX: ffff8881053ffc40 RCX: 1ffffffff47a4b3c
[  145.789944] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  145.790456] RBP: ffff8881053ffb90 R08: 0000000000000000 R09: fffffbfff47a4b3c
[  145.790738] R10: 0000000000000003 R11: 0000000000036c38 R12: ffff8881053ffc18
[  145.791109] R13: ffff88810292d800 R14: ffff888103c8a000 R15: ffff888102712a00
[  145.791535] FS:  0000000000000000(0000) GS:ffff8881b6193000(0000) knlGS:0000000000000000
[  145.791950] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  145.792365] CR2: 00007ffff7ffe000 CR3: 0000000157eba000 CR4: 00000000000006f0
[  145.792730] DR0: ffffffffa5030884 DR1: ffffffffa5030889 DR2: ffffffffa503088a
[  145.793179] DR3: ffffffffa503088b DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  145.793853] Call Trace:
[  145.794051]  <TASK>
[  145.794279]  drm_test_framebuffer_free+0x1ab/0x610
[  145.794496]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  145.794752]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  145.795009]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  145.795358]  ? __drmm_add_action_or_reset+0x22/0x50
[  145.796045]  ? __schedule+0x10cc/0x2b30
[  145.796333]  ? __pfx_read_tsc+0x10/0x10
[  145.796545]  ? ktime_get_ts64+0x86/0x230
[  145.796758]  kunit_try_run_case+0x1a5/0x480
[  145.797438]  ? __pfx_kunit_try_run_case+0x10/0x10
[  145.797777]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  145.798238]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  145.798479]  ? __kthread_parkme+0x82/0x180
[  145.798688]  ? preempt_count_sub+0x50/0x80
[  145.799249]  ? __pfx_kunit_try_run_case+0x10/0x10
[  145.799471]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  145.799790]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  145.800310]  kthread+0x337/0x6f0
[  145.800610]  ? trace_preempt_on+0x20/0xc0
[  145.800786]  ? __pfx_kthread+0x10/0x10
[  145.801407]  ? _raw_spin_unlock_irq+0x47/0x80
[  145.801623]  ? calculate_sigpending+0x7b/0xa0
[  145.801832]  ? __pfx_kthread+0x10/0x10
[  145.802391]  ret_from_fork+0x41/0x80
[  145.802555]  ? __pfx_kthread+0x10/0x10
[  145.803070]  ret_from_fork_asm+0x1a/0x30
[  145.803313]  </TASK>
[  145.803540] ---[ end trace 0000000000000000 ]---