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[  138.830197] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  138.830347] WARNING: CPU: 1 PID: 2522 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  138.832339] Modules linked in:
[  138.833090] CPU: 1 UID: 0 PID: 2522 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.8-rc1 #1 PREEMPT(voluntary) 
[  138.834528] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  138.835148] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  138.835992] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  138.836525] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 6b 8b 84 00 48 c7 c1 00 68 5c b0 4c 89 fa 48 c7 c7 60 68 5c b0 48 89 c6 e8 32 6d 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
[  138.838124] RSP: 0000:ffff88810345fb68 EFLAGS: 00010282
[  138.838863] RAX: 0000000000000000 RBX: ffff88810345fc40 RCX: 1ffffffff6264be8
[  138.839580] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  138.840336] RBP: ffff88810345fb90 R08: 0000000000000000 R09: fffffbfff6264be8
[  138.841142] R10: 0000000000000003 R11: 00000000000379c8 R12: ffff88810345fc18
[  138.841587] R13: ffff8881078f9000 R14: ffff88810111a000 R15: ffff888103afb400
[  138.842729] FS:  0000000000000000(0000) GS:ffff8881a8b90000(0000) knlGS:0000000000000000
[  138.843471] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  138.843910] CR2: 00007ffff7ffe000 CR3: 000000002a6ba000 CR4: 00000000000006f0
[  138.844948] DR0: ffffffffb2633900 DR1: ffffffffb2633901 DR2: ffffffffb2633903
[  138.845453] DR3: ffffffffb2633905 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  138.845672] Call Trace:
[  138.845775]  <TASK>
[  138.845880]  drm_test_framebuffer_free+0x1ab/0x610
[  138.846059]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  138.846257]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  138.846733]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  138.847281]  ? __drmm_add_action_or_reset+0x22/0x50
[  138.847833]  ? __schedule+0x10c6/0x2b60
[  138.848275]  ? __pfx_read_tsc+0x10/0x10
[  138.848654]  ? ktime_get_ts64+0x86/0x230
[  138.849122]  kunit_try_run_case+0x1a5/0x480
[  138.849535]  ? __pfx_kunit_try_run_case+0x10/0x10
[  138.850037]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  138.850567]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  138.850784]  ? __kthread_parkme+0x82/0x180
[  138.851201]  ? preempt_count_sub+0x50/0x80
[  138.851529]  ? __pfx_kunit_try_run_case+0x10/0x10
[  138.851695]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  138.852225]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  138.852929]  kthread+0x337/0x6f0
[  138.853217]  ? trace_preempt_on+0x20/0xc0
[  138.853397]  ? __pfx_kthread+0x10/0x10
[  138.853801]  ? _raw_spin_unlock_irq+0x47/0x80
[  138.854226]  ? calculate_sigpending+0x7b/0xa0
[  138.854464]  ? __pfx_kthread+0x10/0x10
[  138.854869]  ret_from_fork+0x41/0x80
[  138.855126]  ? __pfx_kthread+0x10/0x10
[  138.855275]  ret_from_fork_asm+0x1a/0x30
[  138.855449]  </TASK>
[  138.855541] ---[ end trace 0000000000000000 ]---