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[  194.984488] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  194.984637] WARNING: drivers/gpu/drm/drm_framebuffer.c:832 at drm_framebuffer_free+0x13f/0x1c0, CPU#0: kunit_try_catch/2692
[  194.985281] Modules linked in:
[  194.986099] CPU: 0 UID: 0 PID: 2692 Comm: kunit_try_catch Tainted: G    B D W        N  6.16.0-rc5-next-20250711 #1 PREEMPT(voluntary) 
[  194.987441] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  194.988276] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  194.989321] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  194.990003] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 bb 01 89 00 48 c7 c1 c0 df 7f bb 4c 89 fa 48 c7 c7 20 e0 7f bb 48 89 c6 e8 12 31 79 fe 90 <0f> 0b 90 90 e9 1c ff ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 ea
[  194.991732] RSP: 0000:ffff88810e80fb68 EFLAGS: 00010282
[  194.991932] RAX: 0000000000000000 RBX: ffff88810e80fc40 RCX: 1ffffffff78a4b70
[  194.992136] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  194.992764] RBP: ffff88810e80fb90 R08: 0000000000000000 R09: fffffbfff78a4b70
[  194.993241] R10: 0000000000000003 R11: 000000000003a180 R12: ffff88810e80fc18
[  194.994037] R13: ffff88810d3b5000 R14: ffff88810d3c3000 R15: ffff888105912200
[  194.994452] FS:  0000000000000000(0000) GS:ffff88819d81d000(0000) knlGS:0000000000000000
[  194.994979] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  194.995344] CR2: ffffffffffffffff CR3: 000000012eebc000 CR4: 00000000000006f0
[  194.995710] DR0: ffffffffbd8a9500 DR1: ffffffffbd8a9501 DR2: ffffffffbd8a9502
[  194.995916] DR3: ffffffffbd8a9503 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  194.996114] Call Trace:
[  194.996214]  <TASK>
[  194.996779]  drm_test_framebuffer_free+0x1ab/0x610
[  194.997282]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  194.997883]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  194.998461]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  194.998971]  ? __drmm_add_action_or_reset+0x22/0x50
[  194.999376]  ? __schedule+0x10cc/0x2b60
[  194.999699]  ? __pfx_read_tsc+0x10/0x10
[  194.999845]  ? ktime_get_ts64+0x86/0x230
[  194.999987]  kunit_try_run_case+0x1a5/0x480
[  195.000132]  ? __pfx_kunit_try_run_case+0x10/0x10
[  195.000309]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  195.000532]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  195.000902]  ? __kthread_parkme+0x82/0x180
[  195.001073]  ? preempt_count_sub+0x50/0x80
[  195.001271]  ? __pfx_kunit_try_run_case+0x10/0x10
[  195.001518]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  195.001701]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  195.002030]  kthread+0x337/0x6f0
[  195.002207]  ? trace_preempt_on+0x20/0xc0
[  195.002390]  ? __pfx_kthread+0x10/0x10
[  195.002580]  ? _raw_spin_unlock_irq+0x47/0x80
[  195.002925]  ? calculate_sigpending+0x7b/0xa0
[  195.003153]  ? __pfx_kthread+0x10/0x10
[  195.003286]  ret_from_fork+0x116/0x1d0
[  195.003460]  ? __pfx_kthread+0x10/0x10
[  195.003675]  ret_from_fork_asm+0x1a/0x30
[  195.004040]  </TASK>
[  195.004133] ---[ end trace 0000000000000000 ]---