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[  159.331891] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  159.332062] WARNING: CPU: 0 PID: 2522 at drivers/gpu/drm/drm_framebuffer.c:832 drm_framebuffer_free+0x13f/0x1c0
[  159.332980] Modules linked in:
[  159.333495] CPU: 0 UID: 0 PID: 2522 Comm: kunit_try_catch Tainted: G    B D W        N  6.15.2-rc1 #1 PREEMPT(voluntary) 
[  159.334191] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  159.334379] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  159.334779] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  159.335306] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 6b 80 84 00 48 c7 c1 a0 55 dc 99 4c 89 fa 48 c7 c7 00 56 dc 99 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
[  159.335931] RSP: 0000:ffff88810762fb68 EFLAGS: 00010282
[  159.336103] RAX: 0000000000000000 RBX: ffff88810762fc40 RCX: 1ffffffff3564b3c
[  159.336236] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  159.336362] RBP: ffff88810762fb90 R08: 0000000000000000 R09: fffffbfff3564b3c
[  159.336861] R10: 0000000000000003 R11: 0000000000038278 R12: ffff88810762fc18
[  159.337315] R13: ffff8881079b7000 R14: ffff888107d9b000 R15: ffff8881073c0000
[  159.337581] FS:  0000000000000000(0000) GS:ffff8881bf293000(0000) knlGS:0000000000000000
[  159.338230] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  159.338464] CR2: ffffffffffffffff CR3: 00000000416ba000 CR4: 00000000000006f0
[  159.339007] DR0: ffffffff9be30880 DR1: ffffffff9be30881 DR2: ffffffff9be30882
[  159.339378] DR3: ffffffff9be30883 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  159.339674] Call Trace:
[  159.340036]  <TASK>
[  159.340225]  drm_test_framebuffer_free+0x1ab/0x610
[  159.340390]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  159.340504]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  159.341072]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  159.341270]  ? __drmm_add_action_or_reset+0x22/0x50
[  159.341405]  ? __schedule+0x10cc/0x2b30
[  159.341513]  ? __pfx_read_tsc+0x10/0x10
[  159.342001]  ? ktime_get_ts64+0x86/0x230
[  159.342286]  kunit_try_run_case+0x1a5/0x480
[  159.342407]  ? __pfx_kunit_try_run_case+0x10/0x10
[  159.342728]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  159.343234]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  159.343381]  ? __kthread_parkme+0x82/0x180
[  159.343604]  ? preempt_count_sub+0x50/0x80
[  159.344031]  ? __pfx_kunit_try_run_case+0x10/0x10
[  159.344214]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  159.344492]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  159.344768]  kthread+0x337/0x6f0
[  159.344937]  ? trace_preempt_on+0x20/0xc0
[  159.345223]  ? __pfx_kthread+0x10/0x10
[  159.345360]  ? _raw_spin_unlock_irq+0x47/0x80
[  159.345482]  ? calculate_sigpending+0x7b/0xa0
[  159.345783]  ? __pfx_kthread+0x10/0x10
[  159.346103]  ret_from_fork+0x41/0x80
[  159.346280]  ? __pfx_kthread+0x10/0x10
[  159.346421]  ret_from_fork_asm+0x1a/0x30
[  159.346694]  </TASK>
[  159.346843] ---[ end trace 0000000000000000 ]---