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[  198.649814] drm-kunit-mock-device drm_test_framebuffer_free.drm-kunit-mock-device: [drm] drm_WARN_ON(!list_empty(&fb->filp_head))
[  198.649912] WARNING: drivers/gpu/drm/drm_framebuffer.c:833 at drm_framebuffer_free+0x13f/0x1c0, CPU#0: kunit_try_catch/2730
[  198.651376] Modules linked in:
[  198.651558] CPU: 0 UID: 0 PID: 2730 Comm: kunit_try_catch Tainted: G    B D W        N  6.16.0-rc7-next-20250724 #1 PREEMPT(voluntary) 
[  198.652281] Tainted: [B]=BAD_PAGE, [D]=DIE, [W]=WARN, [N]=TEST
[  198.652712] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[  198.653300] RIP: 0010:drm_framebuffer_free+0x13f/0x1c0
[  198.653653] Code: 8b 7d 50 4d 85 ff 74 2b 4c 89 ef e8 5b 06 89 00 48 c7 c1 60 35 20 a9 4c 89 fa 48 c7 c7 c0 35 20 a9 48 89 c6 e8 62 4a 77 fe 90 <0f> 0b 90 90 e9 1c ff ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 ea
[  198.654754] RSP: 0000:ffff88810a44fb68 EFLAGS: 00010282
[  198.655309] RAX: 0000000000000000 RBX: ffff88810a44fc40 RCX: 1ffffffff53e4aac
[  198.655955] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
[  198.656670] RBP: ffff88810a44fb90 R08: 0000000000000000 R09: fffffbfff53e4aac
[  198.657260] R10: 0000000000000003 R11: 000000000004b960 R12: ffff88810a44fc18
[  198.657612] R13: ffff88810a558000 R14: ffff88810a45c000 R15: ffff888102e8a300
[  198.658009] FS:  0000000000000000(0000) GS:ffff8881afe0d000(0000) knlGS:0000000000000000
[  198.658701] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  198.659180] CR2: ffffffffffffffff CR3: 000000013cebc000 CR4: 00000000000006f0
[  198.659499] DR0: ffffffffab2b9580 DR1: ffffffffab2b9581 DR2: ffffffffab2b9583
[  198.659719] DR3: ffffffffab2b9585 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[  198.660595] Call Trace:
[  198.660889]  <TASK>
[  198.661253]  drm_test_framebuffer_free+0x1ab/0x610
[  198.661864]  ? __pfx_drm_test_framebuffer_free+0x10/0x10
[  198.662055]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  198.662234]  ? __pfx_drm_mode_config_init_release+0x10/0x10
[  198.662410]  ? __drmm_add_action_or_reset+0x22/0x50
[  198.662598]  ? __schedule+0x10da/0x2b60
[  198.662740]  ? __pfx_read_tsc+0x10/0x10
[  198.663033]  ? ktime_get_ts64+0x86/0x230
[  198.663255]  kunit_try_run_case+0x1a5/0x480
[  198.663442]  ? __pfx_kunit_try_run_case+0x10/0x10
[  198.663655]  ? _raw_spin_lock_irqsave+0xa1/0x100
[  198.664522]  ? _raw_spin_unlock_irqrestore+0x5f/0x90
[  198.664749]  ? __kthread_parkme+0x82/0x180
[  198.664969]  ? preempt_count_sub+0x50/0x80
[  198.665494]  ? __pfx_kunit_try_run_case+0x10/0x10
[  198.665742]  kunit_generic_run_threadfn_adapter+0x85/0xf0
[  198.666234]  ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10
[  198.666617]  kthread+0x337/0x6f0
[  198.667000]  ? trace_preempt_on+0x20/0xc0
[  198.667229]  ? __pfx_kthread+0x10/0x10
[  198.667579]  ? _raw_spin_unlock_irq+0x47/0x80
[  198.668133]  ? calculate_sigpending+0x7b/0xa0
[  198.668373]  ? __pfx_kthread+0x10/0x10
[  198.668574]  ret_from_fork+0x116/0x1d0
[  198.668748]  ? __pfx_kthread+0x10/0x10
[  198.669319]  ret_from_fork_asm+0x1a/0x30
[  198.669677]  </TASK>
[  198.669904] ---[ end trace 0000000000000000 ]---