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[  173.143218] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  173.143479] WARNING: CPU: 0 PID: 2523 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  173.145362] Modules linked in:
[  173.145754] CPU: 0 UID: 0 PID: 2523 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.1-rc1 #1 PREEMPT(voluntary) 
[  173.146302] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  173.147004] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  173.147908] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  173.148741] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 6b 80 84 00 48 c7 c1 a0 55 5c 92 4c 89 fa 48 c7 c7 00 56 5c 92 48 89 c6 e8 12 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
[  173.149946] RSP: 0000:ffff888104377b68 EFLAGS: 00010282
[  173.150216] RAX: 0000000000000000 RBX: ffff888104377c40 RCX: 1ffffffff2664b3c
[  173.151234] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  173.151941] RBP: ffff888104377b90 R08: 0000000000000000 R09: fffffbfff2664b3c
[  173.152731] R10: 0000000000000003 R11: 0000000000037580 R12: ffff888104377c18
[  173.153199] R13: ffff888106d64800 R14: ffff888107544000 R15: ffff888107002c80
[  173.154059] FS:  0000000000000000(0000) GS:ffff8881c6a93000(0000) knlGS:0000000000000000
[  173.154761] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  173.155291] CR2: ffffffffffffffff CR3: 00000000498ba000 CR4: 00000000000006f0
[  173.156057] DR0: ffffffff94630880 DR1: ffffffff94630881 DR2: ffffffff94630883
[  173.156549] DR3: ffffffff94630885 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  173.157710] Call Trace:
[  173.157942]  <TASK>
[  173.158567]  drm_test_framebuffer_free+0x1ab/0x610
[  173.159076]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  173.159614]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  173.159988]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  173.160589]  ? __drmm_add_action_or_reset+0x22/0x50
[  173.160960]  ? __schedule+0x10cc/0x2b30
[  173.161619]  ? __pfx_read_tsc+0x10/0x10
[  173.161966]  ? ktime_get_ts64+0x86/0x230
[  173.162936]  kunit_try_run_case+0x1a5/0x480
[  173.163736]  ? __pfx_kunit_try_run_case+0x10/0x10
[  173.163923]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  173.164539]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  173.164797]  ? __kthread_parkme+0x82/0x180
[  173.164931]  ? preempt_count_sub+0x50/0x80
[  173.165730]  ? __pfx_kunit_try_run_case+0x10/0x10
[  173.166831]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  173.167200]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  173.168133]  kthread+0x337/0x6f0
[  173.168699]  ? trace_preempt_on+0x20/0xc0
[  173.168975]  ? __pfx_kthread+0x10/0x10
[  173.169364]  ? _raw_spin_unlock_irq+0x47/0x80
[  173.170769]  ? calculate_sigpending+0x7b/0xa0
[  173.171115]  ? __pfx_kthread+0x10/0x10
[  173.171592]  ret_from_fork+0x41/0x80
[  173.172618]  ? __pfx_kthread+0x10/0x10
[  173.172862]  ret_from_fork_asm+0x1a/0x30
[  173.173640]  </TASK>
[  173.173866] ---[ end trace 0000000000000000 ]---